/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 00:22:09,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 00:22:09,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 00:22:09,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 00:22:09,400 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 [2021-03-11 00:22:09,413 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 00:22:09,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 00:22:09,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-11 00:22:09,413 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-11 00:22:09,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 00:22:09,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 00:22:09,414 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 00:22:09,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 00:22:09,415 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 00:22:09,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 00:22:09,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 00:22:09,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 00:22:09,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 00:22:09,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 00:22:09,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 00:22:09,416 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 00:22:09,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 00:22:09,416 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 00:22:09,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 00:22:09,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 00:22:09,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 00:22:09,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 00:22:09,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 00:22:09,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:22:09,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 00:22:09,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 00:22:09,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 00:22:09,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 00:22:09,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 00:22:09,417 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 00:22:09,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 00:22:09,418 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 00:22:09,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 00:22:09,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 00:22:09,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 00:22:09,662 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 00:22:09,664 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 00:22:09,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl [2021-03-11 00:22:09,665 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl' [2021-03-11 00:22:09,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 00:22:09,707 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 00:22:09,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 00:22:09,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 00:22:09,708 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 00:22:09,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:22:09" (1/1) ... [2021-03-11 00:22:09,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:22:09" (1/1) ... [2021-03-11 00:22:09,727 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 00:22:09,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 00:22:09,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 00:22:09,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 00:22:09,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:22:09" (1/1) ... [2021-03-11 00:22:09,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:22:09" (1/1) ... [2021-03-11 00:22:09,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:22:09" (1/1) ... [2021-03-11 00:22:09,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:22:09" (1/1) ... [2021-03-11 00:22:09,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:22:09" (1/1) ... [2021-03-11 00:22:09,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:22:09" (1/1) ... [2021-03-11 00:22:09,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:22:09" (1/1) ... [2021-03-11 00:22:09,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 00:22:09,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 00:22:09,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 00:22:09,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 00:22:09,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:22:09" (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 [2021-03-11 00:22:09,799 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 00:22:09,799 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 00:22:09,799 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 00:22:09,799 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 00:22:09,799 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 00:22:09,799 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 00:22:09,800 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 00:22:09,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 00:22:09,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 00:22:09,800 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 00:22:09,800 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 00:22:09,800 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 00:22:09,800 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 00:22:10,024 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 00:22:10,024 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 00:22:10,025 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:22:10 BoogieIcfgContainer [2021-03-11 00:22:10,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 00:22:10,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 00:22:10,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 00:22:10,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 00:22:10,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:22:09" (1/2) ... [2021-03-11 00:22:10,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469a1716 and model type sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 12:22:10, skipping insertion in model container [2021-03-11 00:22:10,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:22:10" (2/2) ... [2021-03-11 00:22:10,030 INFO L111 eAbstractionObserver]: Analyzing ICFG sorted.wvr.bpl [2021-03-11 00:22:10,034 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 00:22:10,034 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 00:22:10,049 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 00:22:10,050 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 00:22:10,113 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 00:22:10,124 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 00:22:10,146 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 00:22:10,146 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 00:22:10,146 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 00:22:10,146 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 00:22:10,147 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 00:22:10,147 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 00:22:10,147 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 00:22:10,147 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 00:22:10,158 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-03-11 00:22:10,177 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:22:10,189 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:10,189 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:10,190 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:10,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:10,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1415304500, now seen corresponding path program 1 times [2021-03-11 00:22:10,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:10,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723727537] [2021-03-11 00:22:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:10,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723727537] [2021-03-11 00:22:10,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:22:10,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:22:10,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410255496] [2021-03-11 00:22:10,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:22:10,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:10,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:22:10,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:22:10,350 INFO L87 Difference]: Start difference. First operand has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:10,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:10,389 INFO L93 Difference]: Finished difference Result 410 states and 1170 transitions. [2021-03-11 00:22:10,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 00:22:10,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-11 00:22:10,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:10,400 INFO L225 Difference]: With dead ends: 410 [2021-03-11 00:22:10,400 INFO L226 Difference]: Without dead ends: 395 [2021-03-11 00:22:10,401 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:22:10,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-03-11 00:22:10,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 152. [2021-03-11 00:22:10,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.794701986754967) internal successors, (422), 151 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 422 transitions. [2021-03-11 00:22:10,437 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 422 transitions. Word has length 21 [2021-03-11 00:22:10,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:10,438 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 422 transitions. [2021-03-11 00:22:10,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:10,438 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 422 transitions. [2021-03-11 00:22:10,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:22:10,440 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:10,440 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:10,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 00:22:10,440 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:10,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash 435293552, now seen corresponding path program 1 times [2021-03-11 00:22:10,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:10,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227451602] [2021-03-11 00:22:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:10,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227451602] [2021-03-11 00:22:10,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016288754] [2021-03-11 00:22:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:10,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:22:10,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:10,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:10,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-11 00:22:10,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091275064] [2021-03-11 00:22:10,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:22:10,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:10,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:22:10,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:22:10,656 INFO L87 Difference]: Start difference. First operand 152 states and 422 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:10,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:10,914 INFO L93 Difference]: Finished difference Result 532 states and 1491 transitions. [2021-03-11 00:22:10,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:22:10,915 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:22:10,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:10,919 INFO L225 Difference]: With dead ends: 532 [2021-03-11 00:22:10,919 INFO L226 Difference]: Without dead ends: 532 [2021-03-11 00:22:10,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:22:10,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-03-11 00:22:10,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 165. [2021-03-11 00:22:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.8963414634146343) internal successors, (475), 164 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:10,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 475 transitions. [2021-03-11 00:22:10,952 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 475 transitions. Word has length 23 [2021-03-11 00:22:10,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:10,952 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 475 transitions. [2021-03-11 00:22:10,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:10,953 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 475 transitions. [2021-03-11 00:22:10,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:22:10,956 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:10,956 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:11,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-11 00:22:11,164 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:11,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:11,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1894116080, now seen corresponding path program 2 times [2021-03-11 00:22:11,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:11,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663463968] [2021-03-11 00:22:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:11,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663463968] [2021-03-11 00:22:11,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911987129] [2021-03-11 00:22:11,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:11,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:11,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:11,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:22:11,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:11,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:11,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-11 00:22:11,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57127706] [2021-03-11 00:22:11,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:22:11,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:11,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:22:11,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:22:11,402 INFO L87 Difference]: Start difference. First operand 165 states and 475 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:11,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:11,626 INFO L93 Difference]: Finished difference Result 565 states and 1578 transitions. [2021-03-11 00:22:11,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:22:11,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:22:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:11,632 INFO L225 Difference]: With dead ends: 565 [2021-03-11 00:22:11,632 INFO L226 Difference]: Without dead ends: 565 [2021-03-11 00:22:11,633 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:22:11,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-03-11 00:22:11,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 166. [2021-03-11 00:22:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.878787878787879) internal successors, (475), 165 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:11,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 475 transitions. [2021-03-11 00:22:11,645 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 475 transitions. Word has length 23 [2021-03-11 00:22:11,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:11,645 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 475 transitions. [2021-03-11 00:22:11,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:11,645 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 475 transitions. [2021-03-11 00:22:11,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:22:11,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:11,647 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:11,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:11,861 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:11,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:11,861 INFO L82 PathProgramCache]: Analyzing trace with hash 730755178, now seen corresponding path program 1 times [2021-03-11 00:22:11,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:11,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208512684] [2021-03-11 00:22:11,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:11,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208512684] [2021-03-11 00:22:11,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163034886] [2021-03-11 00:22:11,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:11,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:22:11,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:12,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:12,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-11 00:22:12,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842164921] [2021-03-11 00:22:12,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:22:12,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:12,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:22:12,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:22:12,031 INFO L87 Difference]: Start difference. First operand 166 states and 475 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:12,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:12,080 INFO L93 Difference]: Finished difference Result 356 states and 997 transitions. [2021-03-11 00:22:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 00:22:12,080 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:22:12,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:12,082 INFO L225 Difference]: With dead ends: 356 [2021-03-11 00:22:12,082 INFO L226 Difference]: Without dead ends: 356 [2021-03-11 00:22:12,082 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:12,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-03-11 00:22:12,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 186. [2021-03-11 00:22:12,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9783783783783786) internal successors, (551), 185 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 551 transitions. [2021-03-11 00:22:12,088 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 551 transitions. Word has length 23 [2021-03-11 00:22:12,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:12,088 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 551 transitions. [2021-03-11 00:22:12,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:12,088 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 551 transitions. [2021-03-11 00:22:12,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:22:12,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:12,089 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:12,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:12,304 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:12,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:12,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1327749482, now seen corresponding path program 3 times [2021-03-11 00:22:12,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:12,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074372840] [2021-03-11 00:22:12,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:12,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074372840] [2021-03-11 00:22:12,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136560070] [2021-03-11 00:22:12,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:12,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:22:12,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:12,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:22:12,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:12,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:12,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-11 00:22:12,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361680071] [2021-03-11 00:22:12,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:22:12,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:12,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:22:12,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:22:12,443 INFO L87 Difference]: Start difference. First operand 186 states and 551 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:12,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:12,598 INFO L93 Difference]: Finished difference Result 597 states and 1646 transitions. [2021-03-11 00:22:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:22:12,599 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:22:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:12,601 INFO L225 Difference]: With dead ends: 597 [2021-03-11 00:22:12,601 INFO L226 Difference]: Without dead ends: 597 [2021-03-11 00:22:12,601 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:22:12,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-03-11 00:22:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 186. [2021-03-11 00:22:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9783783783783786) internal successors, (551), 185 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 551 transitions. [2021-03-11 00:22:12,608 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 551 transitions. Word has length 23 [2021-03-11 00:22:12,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:12,608 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 551 transitions. [2021-03-11 00:22:12,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:12,608 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 551 transitions. [2021-03-11 00:22:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:22:12,609 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:12,609 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:12,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:12,824 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:12,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1644969426, now seen corresponding path program 1 times [2021-03-11 00:22:12,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:12,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332445153] [2021-03-11 00:22:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:12,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332445153] [2021-03-11 00:22:12,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:22:12,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:22:12,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400411954] [2021-03-11 00:22:12,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:22:12,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:12,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:22:12,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:22:12,862 INFO L87 Difference]: Start difference. First operand 186 states and 551 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:12,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:12,922 INFO L93 Difference]: Finished difference Result 329 states and 915 transitions. [2021-03-11 00:22:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 00:22:12,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:22:12,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:12,927 INFO L225 Difference]: With dead ends: 329 [2021-03-11 00:22:12,927 INFO L226 Difference]: Without dead ends: 323 [2021-03-11 00:22:12,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:22:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-03-11 00:22:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 225. [2021-03-11 00:22:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.924107142857143) internal successors, (655), 224 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 655 transitions. [2021-03-11 00:22:12,933 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 655 transitions. Word has length 23 [2021-03-11 00:22:12,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:12,933 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 655 transitions. [2021-03-11 00:22:12,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:12,934 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 655 transitions. [2021-03-11 00:22:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:22:12,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:12,934 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:12,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 00:22:12,935 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:12,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:12,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1918692182, now seen corresponding path program 2 times [2021-03-11 00:22:12,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:12,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184970057] [2021-03-11 00:22:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:12,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184970057] [2021-03-11 00:22:12,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:22:12,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:22:12,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891451446] [2021-03-11 00:22:12,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:22:12,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:12,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:22:12,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:22:12,996 INFO L87 Difference]: Start difference. First operand 225 states and 655 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:13,026 INFO L93 Difference]: Finished difference Result 295 states and 825 transitions. [2021-03-11 00:22:13,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 00:22:13,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:22:13,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:13,030 INFO L225 Difference]: With dead ends: 295 [2021-03-11 00:22:13,030 INFO L226 Difference]: Without dead ends: 295 [2021-03-11 00:22:13,030 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:22:13,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-03-11 00:22:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 209. [2021-03-11 00:22:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.9278846153846154) internal successors, (609), 208 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 609 transitions. [2021-03-11 00:22:13,036 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 609 transitions. Word has length 23 [2021-03-11 00:22:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:13,037 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 609 transitions. [2021-03-11 00:22:13,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,038 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 609 transitions. [2021-03-11 00:22:13,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:22:13,039 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:13,039 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:13,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 00:22:13,039 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:13,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:13,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1943824618, now seen corresponding path program 3 times [2021-03-11 00:22:13,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:13,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505482243] [2021-03-11 00:22:13,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:13,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505482243] [2021-03-11 00:22:13,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:22:13,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 00:22:13,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765464749] [2021-03-11 00:22:13,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 00:22:13,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:13,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 00:22:13,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:22:13,076 INFO L87 Difference]: Start difference. First operand 209 states and 609 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:13,121 INFO L93 Difference]: Finished difference Result 303 states and 837 transitions. [2021-03-11 00:22:13,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 00:22:13,121 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:22:13,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:13,122 INFO L225 Difference]: With dead ends: 303 [2021-03-11 00:22:13,122 INFO L226 Difference]: Without dead ends: 303 [2021-03-11 00:22:13,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:22:13,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-03-11 00:22:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 201. [2021-03-11 00:22:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.865) internal successors, (573), 200 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) [2021-03-11 00:22:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 573 transitions. [2021-03-11 00:22:13,134 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 573 transitions. Word has length 23 [2021-03-11 00:22:13,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:13,134 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 573 transitions. [2021-03-11 00:22:13,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,134 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 573 transitions. [2021-03-11 00:22:13,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:22:13,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:13,136 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:13,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 00:22:13,136 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:13,137 INFO L82 PathProgramCache]: Analyzing trace with hash 2060210918, now seen corresponding path program 4 times [2021-03-11 00:22:13,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:13,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142517310] [2021-03-11 00:22:13,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:13,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142517310] [2021-03-11 00:22:13,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:22:13,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 00:22:13,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292050276] [2021-03-11 00:22:13,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 00:22:13,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:13,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 00:22:13,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:22:13,169 INFO L87 Difference]: Start difference. First operand 201 states and 573 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:13,259 INFO L93 Difference]: Finished difference Result 326 states and 884 transitions. [2021-03-11 00:22:13,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:22:13,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:22:13,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:13,261 INFO L225 Difference]: With dead ends: 326 [2021-03-11 00:22:13,261 INFO L226 Difference]: Without dead ends: 322 [2021-03-11 00:22:13,261 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:22:13,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-03-11 00:22:13,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 201. [2021-03-11 00:22:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.855) internal successors, (571), 200 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 571 transitions. [2021-03-11 00:22:13,266 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 571 transitions. Word has length 23 [2021-03-11 00:22:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:13,266 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 571 transitions. [2021-03-11 00:22:13,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,267 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 571 transitions. [2021-03-11 00:22:13,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:22:13,267 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:13,267 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:13,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 00:22:13,268 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:13,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:13,269 INFO L82 PathProgramCache]: Analyzing trace with hash 227810994, now seen corresponding path program 2 times [2021-03-11 00:22:13,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:13,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347672834] [2021-03-11 00:22:13,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:13,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347672834] [2021-03-11 00:22:13,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:22:13,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:22:13,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933442271] [2021-03-11 00:22:13,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 00:22:13,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:13,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 00:22:13,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:22:13,318 INFO L87 Difference]: Start difference. First operand 201 states and 571 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:13,368 INFO L93 Difference]: Finished difference Result 229 states and 638 transitions. [2021-03-11 00:22:13,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:22:13,369 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:22:13,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:13,370 INFO L225 Difference]: With dead ends: 229 [2021-03-11 00:22:13,370 INFO L226 Difference]: Without dead ends: 211 [2021-03-11 00:22:13,370 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:22:13,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-03-11 00:22:13,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 178. [2021-03-11 00:22:13,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.847457627118644) internal successors, (504), 177 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 504 transitions. [2021-03-11 00:22:13,375 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 504 transitions. Word has length 23 [2021-03-11 00:22:13,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:13,375 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 504 transitions. [2021-03-11 00:22:13,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,375 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 504 transitions. [2021-03-11 00:22:13,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:22:13,375 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:13,376 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:13,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 00:22:13,376 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:13,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:13,376 INFO L82 PathProgramCache]: Analyzing trace with hash -961400090, now seen corresponding path program 5 times [2021-03-11 00:22:13,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:13,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694819684] [2021-03-11 00:22:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:13,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694819684] [2021-03-11 00:22:13,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:22:13,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 00:22:13,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344639302] [2021-03-11 00:22:13,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 00:22:13,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:13,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 00:22:13,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:22:13,425 INFO L87 Difference]: Start difference. First operand 178 states and 504 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:13,497 INFO L93 Difference]: Finished difference Result 331 states and 903 transitions. [2021-03-11 00:22:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:22:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:22:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:13,499 INFO L225 Difference]: With dead ends: 331 [2021-03-11 00:22:13,499 INFO L226 Difference]: Without dead ends: 327 [2021-03-11 00:22:13,499 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:22:13,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-03-11 00:22:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 198. [2021-03-11 00:22:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.83248730964467) internal successors, (558), 197 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 558 transitions. [2021-03-11 00:22:13,508 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 558 transitions. Word has length 23 [2021-03-11 00:22:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:13,509 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 558 transitions. [2021-03-11 00:22:13,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 558 transitions. [2021-03-11 00:22:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:22:13,510 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:13,510 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:13,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-11 00:22:13,510 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:13,511 INFO L82 PathProgramCache]: Analyzing trace with hash 17157354, now seen corresponding path program 6 times [2021-03-11 00:22:13,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:13,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166108974] [2021-03-11 00:22:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:13,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166108974] [2021-03-11 00:22:13,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:22:13,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 00:22:13,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444085404] [2021-03-11 00:22:13,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 00:22:13,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:13,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 00:22:13,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:22:13,556 INFO L87 Difference]: Start difference. First operand 198 states and 558 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:13,638 INFO L93 Difference]: Finished difference Result 313 states and 871 transitions. [2021-03-11 00:22:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:22:13,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:22:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:13,641 INFO L225 Difference]: With dead ends: 313 [2021-03-11 00:22:13,641 INFO L226 Difference]: Without dead ends: 313 [2021-03-11 00:22:13,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:13,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-03-11 00:22:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 182. [2021-03-11 00:22:13,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.839779005524862) internal successors, (514), 181 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 514 transitions. [2021-03-11 00:22:13,647 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 514 transitions. Word has length 23 [2021-03-11 00:22:13,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:13,647 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 514 transitions. [2021-03-11 00:22:13,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:13,647 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 514 transitions. [2021-03-11 00:22:13,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:22:13,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:13,647 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:13,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-11 00:22:13,648 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:13,648 INFO L82 PathProgramCache]: Analyzing trace with hash 751961810, now seen corresponding path program 1 times [2021-03-11 00:22:13,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:13,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346281714] [2021-03-11 00:22:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:13,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346281714] [2021-03-11 00:22:13,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844647905] [2021-03-11 00:22:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-11 00:22:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:14,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-11 00:22:14,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:14,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:14,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:14,498 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:22:14,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 23 [2021-03-11 00:22:14,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:14,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:14,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:14,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:14,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:14,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2021-03-11 00:22:14,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:14,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:14,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:14,625 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:22:14,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 21 [2021-03-11 00:22:14,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:14,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:14,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:14,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:14,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:14,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2021-03-11 00:22:14,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:14,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:14,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:22:14,740 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:121, output treesize:51 [2021-03-11 00:22:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:14,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:14,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:22:14,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588976389] [2021-03-11 00:22:14,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:22:14,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:14,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:22:14,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:22:14,819 INFO L87 Difference]: Start difference. First operand 182 states and 514 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:15,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:15,433 INFO L93 Difference]: Finished difference Result 545 states and 1590 transitions. [2021-03-11 00:22:15,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:22:15,433 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:22:15,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:15,436 INFO L225 Difference]: With dead ends: 545 [2021-03-11 00:22:15,436 INFO L226 Difference]: Without dead ends: 515 [2021-03-11 00:22:15,437 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 797.6ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:22:15,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-03-11 00:22:15,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 236. [2021-03-11 00:22:15,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.948936170212766) internal successors, (693), 235 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 693 transitions. [2021-03-11 00:22:15,442 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 693 transitions. Word has length 25 [2021-03-11 00:22:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:15,442 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 693 transitions. [2021-03-11 00:22:15,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 693 transitions. [2021-03-11 00:22:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:22:15,443 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:15,443 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:15,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-11 00:22:15,651 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:15,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:15,651 INFO L82 PathProgramCache]: Analyzing trace with hash 758582462, now seen corresponding path program 2 times [2021-03-11 00:22:15,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:15,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158754307] [2021-03-11 00:22:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:15,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158754307] [2021-03-11 00:22:15,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369147144] [2021-03-11 00:22:15,950 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 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 [2021-03-11 00:22:15,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:15,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:15,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:22:15,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:16,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:16,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:16,141 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-03-11 00:22:16,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 19 [2021-03-11 00:22:16,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:16,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:16,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:16,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:16,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-03-11 00:22:16,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:16,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:16,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:16,203 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:22:16,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 21 [2021-03-11 00:22:16,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:16,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:16,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:16,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:16,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-03-11 00:22:16,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:16,281 INFO L628 ElimStorePlain]: treesize reduction 18, result has 66.0 percent of original size [2021-03-11 00:22:16,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:22:16,284 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:35 [2021-03-11 00:22:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:16,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:16,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:22:16,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073276106] [2021-03-11 00:22:16,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:22:16,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:16,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:22:16,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:22:16,367 INFO L87 Difference]: Start difference. First operand 236 states and 693 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:17,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:17,473 INFO L93 Difference]: Finished difference Result 697 states and 2045 transitions. [2021-03-11 00:22:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:22:17,473 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:22:17,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:17,476 INFO L225 Difference]: With dead ends: 697 [2021-03-11 00:22:17,476 INFO L226 Difference]: Without dead ends: 682 [2021-03-11 00:22:17,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1172.4ms TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:22:17,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-03-11 00:22:17,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 256. [2021-03-11 00:22:17,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.011764705882353) internal successors, (768), 255 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:17,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 768 transitions. [2021-03-11 00:22:17,484 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 768 transitions. Word has length 25 [2021-03-11 00:22:17,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:17,485 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 768 transitions. [2021-03-11 00:22:17,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 768 transitions. [2021-03-11 00:22:17,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:22:17,485 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:17,485 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:17,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-11 00:22:17,699 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:17,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:17,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1762556338, now seen corresponding path program 3 times [2021-03-11 00:22:17,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:17,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713867264] [2021-03-11 00:22:17,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:18,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713867264] [2021-03-11 00:22:18,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321004112] [2021-03-11 00:22:18,047 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 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 [2021-03-11 00:22:18,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:22:18,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:18,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-11 00:22:18,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:18,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:18,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:22:18,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728798308] [2021-03-11 00:22:18,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:22:18,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:18,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:22:18,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:22:18,290 INFO L87 Difference]: Start difference. First operand 256 states and 768 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-03-11 00:22:18,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:18,486 INFO L93 Difference]: Finished difference Result 450 states and 1268 transitions. [2021-03-11 00:22:18,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:22:18,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 25 [2021-03-11 00:22:18,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:18,488 INFO L225 Difference]: With dead ends: 450 [2021-03-11 00:22:18,488 INFO L226 Difference]: Without dead ends: 435 [2021-03-11 00:22:18,488 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:22:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-03-11 00:22:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 280. [2021-03-11 00:22:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.96415770609319) internal successors, (827), 279 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 827 transitions. [2021-03-11 00:22:18,494 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 827 transitions. Word has length 25 [2021-03-11 00:22:18,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:18,494 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 827 transitions. [2021-03-11 00:22:18,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-03-11 00:22:18,494 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 827 transitions. [2021-03-11 00:22:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:22:18,495 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:18,495 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:18,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:18,704 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:18,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:18,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1965066352, now seen corresponding path program 4 times [2021-03-11 00:22:18,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:18,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129325989] [2021-03-11 00:22:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:18,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129325989] [2021-03-11 00:22:18,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567196632] [2021-03-11 00:22:18,994 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 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 [2021-03-11 00:22:19,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:19,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:19,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:22:19,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:19,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:19,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:22:19,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164422873] [2021-03-11 00:22:19,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:22:19,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:19,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:22:19,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:22:19,209 INFO L87 Difference]: Start difference. First operand 280 states and 827 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-03-11 00:22:19,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:19,411 INFO L93 Difference]: Finished difference Result 406 states and 1141 transitions. [2021-03-11 00:22:19,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:22:19,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 25 [2021-03-11 00:22:19,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:19,413 INFO L225 Difference]: With dead ends: 406 [2021-03-11 00:22:19,413 INFO L226 Difference]: Without dead ends: 391 [2021-03-11 00:22:19,413 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:22:19,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-03-11 00:22:19,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 274. [2021-03-11 00:22:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.9523809523809526) internal successors, (806), 273 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 806 transitions. [2021-03-11 00:22:19,420 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 806 transitions. Word has length 25 [2021-03-11 00:22:19,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:19,421 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 806 transitions. [2021-03-11 00:22:19,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-03-11 00:22:19,421 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 806 transitions. [2021-03-11 00:22:19,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:22:19,421 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:19,421 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:19,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-03-11 00:22:19,639 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:19,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:19,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1336701998, now seen corresponding path program 1 times [2021-03-11 00:22:19,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:19,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468823651] [2021-03-11 00:22:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:19,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468823651] [2021-03-11 00:22:19,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795284837] [2021-03-11 00:22:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-11 00:22:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:19,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:22:19,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:19,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:19,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-11 00:22:19,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603567192] [2021-03-11 00:22:19,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:22:19,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:19,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:22:19,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:22:19,847 INFO L87 Difference]: Start difference. First operand 274 states and 806 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:19,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:19,906 INFO L93 Difference]: Finished difference Result 469 states and 1371 transitions. [2021-03-11 00:22:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:22:19,906 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:22:19,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:19,908 INFO L225 Difference]: With dead ends: 469 [2021-03-11 00:22:19,908 INFO L226 Difference]: Without dead ends: 454 [2021-03-11 00:22:19,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:22:19,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-03-11 00:22:19,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 306. [2021-03-11 00:22:19,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.944262295081967) internal successors, (898), 305 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:19,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 898 transitions. [2021-03-11 00:22:19,914 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 898 transitions. Word has length 25 [2021-03-11 00:22:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:19,914 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 898 transitions. [2021-03-11 00:22:19,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 898 transitions. [2021-03-11 00:22:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:22:19,915 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:19,915 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:20,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:20,123 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:20,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:20,124 INFO L82 PathProgramCache]: Analyzing trace with hash -297591214, now seen corresponding path program 2 times [2021-03-11 00:22:20,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:20,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208642376] [2021-03-11 00:22:20,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:20,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208642376] [2021-03-11 00:22:20,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430418034] [2021-03-11 00:22:20,189 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:22:20,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:20,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:20,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:22:20,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:20,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:20,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-11 00:22:20,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465967600] [2021-03-11 00:22:20,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:22:20,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:20,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:22:20,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:22:20,329 INFO L87 Difference]: Start difference. First operand 306 states and 898 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:20,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:20,382 INFO L93 Difference]: Finished difference Result 491 states and 1441 transitions. [2021-03-11 00:22:20,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:22:20,383 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:22:20,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:20,385 INFO L225 Difference]: With dead ends: 491 [2021-03-11 00:22:20,385 INFO L226 Difference]: Without dead ends: 476 [2021-03-11 00:22:20,385 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:22:20,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-03-11 00:22:20,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 312. [2021-03-11 00:22:20,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.945337620578778) internal successors, (916), 311 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 916 transitions. [2021-03-11 00:22:20,391 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 916 transitions. Word has length 25 [2021-03-11 00:22:20,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:20,391 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 916 transitions. [2021-03-11 00:22:20,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:20,391 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 916 transitions. [2021-03-11 00:22:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:20,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:20,392 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:20,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:20,610 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:20,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:20,610 INFO L82 PathProgramCache]: Analyzing trace with hash 127479732, now seen corresponding path program 5 times [2021-03-11 00:22:20,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:20,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131602755] [2021-03-11 00:22:20,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:20,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131602755] [2021-03-11 00:22:20,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986827596] [2021-03-11 00:22:20,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:20,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:22:20,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:20,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:20,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:20,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:20,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:22:20,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386096396] [2021-03-11 00:22:20,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:20,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:20,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:20,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:20,742 INFO L87 Difference]: Start difference. First operand 312 states and 916 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-03-11 00:22:20,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:20,857 INFO L93 Difference]: Finished difference Result 446 states and 1312 transitions. [2021-03-11 00:22:20,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:22:20,858 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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 27 [2021-03-11 00:22:20,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:20,859 INFO L225 Difference]: With dead ends: 446 [2021-03-11 00:22:20,859 INFO L226 Difference]: Without dead ends: 446 [2021-03-11 00:22:20,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:22:20,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-03-11 00:22:20,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 370. [2021-03-11 00:22:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.035230352303523) internal successors, (1120), 369 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1120 transitions. [2021-03-11 00:22:20,866 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1120 transitions. Word has length 27 [2021-03-11 00:22:20,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:20,866 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 1120 transitions. [2021-03-11 00:22:20,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-03-11 00:22:20,866 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1120 transitions. [2021-03-11 00:22:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:20,867 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:20,867 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:21,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-03-11 00:22:21,082 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:21,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:21,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1011534832, now seen corresponding path program 6 times [2021-03-11 00:22:21,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:21,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545152024] [2021-03-11 00:22:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:21,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545152024] [2021-03-11 00:22:21,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911513740] [2021-03-11 00:22:21,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:22:21,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:22:21,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:21,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:21,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:21,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:21,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:22:21,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946316030] [2021-03-11 00:22:21,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:21,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:21,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:21,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:21,226 INFO L87 Difference]: Start difference. First operand 370 states and 1120 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-03-11 00:22:21,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:21,620 INFO L93 Difference]: Finished difference Result 1017 states and 2828 transitions. [2021-03-11 00:22:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:22:21,620 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 27 [2021-03-11 00:22:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:21,623 INFO L225 Difference]: With dead ends: 1017 [2021-03-11 00:22:21,623 INFO L226 Difference]: Without dead ends: 1017 [2021-03-11 00:22:21,624 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=337, Invalid=1069, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:22:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-03-11 00:22:21,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 409. [2021-03-11 00:22:21,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.1151960784313726) internal successors, (1271), 408 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:21,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1271 transitions. [2021-03-11 00:22:21,633 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1271 transitions. Word has length 27 [2021-03-11 00:22:21,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:21,633 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 1271 transitions. [2021-03-11 00:22:21,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-03-11 00:22:21,634 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1271 transitions. [2021-03-11 00:22:21,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:21,634 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:21,634 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:21,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-11 00:22:21,849 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:21,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:21,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1961184076, now seen corresponding path program 1 times [2021-03-11 00:22:21,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:21,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639287035] [2021-03-11 00:22:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:21,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639287035] [2021-03-11 00:22:21,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501433756] [2021-03-11 00:22:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:21,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:21,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:21,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:21,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-11 00:22:21,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835885998] [2021-03-11 00:22:21,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:21,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:21,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:21,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:21,962 INFO L87 Difference]: Start difference. First operand 409 states and 1271 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-03-11 00:22:22,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:22,159 INFO L93 Difference]: Finished difference Result 838 states and 2442 transitions. [2021-03-11 00:22:22,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:22:22,159 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2021-03-11 00:22:22,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:22,163 INFO L225 Difference]: With dead ends: 838 [2021-03-11 00:22:22,163 INFO L226 Difference]: Without dead ends: 832 [2021-03-11 00:22:22,163 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:22:22,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-03-11 00:22:22,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 522. [2021-03-11 00:22:22,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.1861804222648753) internal successors, (1660), 521 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:22,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1660 transitions. [2021-03-11 00:22:22,174 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1660 transitions. Word has length 27 [2021-03-11 00:22:22,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:22,174 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 1660 transitions. [2021-03-11 00:22:22,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-03-11 00:22:22,175 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1660 transitions. [2021-03-11 00:22:22,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:22,176 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:22,176 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:22,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-03-11 00:22:22,392 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:22,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:22,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1602477532, now seen corresponding path program 2 times [2021-03-11 00:22:22,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:22,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369173599] [2021-03-11 00:22:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:22,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369173599] [2021-03-11 00:22:22,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038105492] [2021-03-11 00:22:22,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:22,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:22,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:22,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:22,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:22,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:22,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-11 00:22:22,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540872099] [2021-03-11 00:22:22,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:22,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:22,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:22,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:22,530 INFO L87 Difference]: Start difference. First operand 522 states and 1660 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-03-11 00:22:22,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:22,747 INFO L93 Difference]: Finished difference Result 905 states and 2647 transitions. [2021-03-11 00:22:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:22:22,747 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2021-03-11 00:22:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:22,750 INFO L225 Difference]: With dead ends: 905 [2021-03-11 00:22:22,751 INFO L226 Difference]: Without dead ends: 905 [2021-03-11 00:22:22,751 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:22:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-03-11 00:22:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 524. [2021-03-11 00:22:22,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.1720841300191203) internal successors, (1659), 523 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:22,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1659 transitions. [2021-03-11 00:22:22,762 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1659 transitions. Word has length 27 [2021-03-11 00:22:22,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:22,762 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 1659 transitions. [2021-03-11 00:22:22,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-03-11 00:22:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1659 transitions. [2021-03-11 00:22:22,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:22,763 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:22,763 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:22,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:22,979 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:22,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:22,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1743996268, now seen corresponding path program 7 times [2021-03-11 00:22:22,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:22,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303980265] [2021-03-11 00:22:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:23,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303980265] [2021-03-11 00:22:23,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992229572] [2021-03-11 00:22:23,017 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 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 [2021-03-11 00:22:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:23,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:23,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:23,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:23,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:22:23,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898011585] [2021-03-11 00:22:23,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:23,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:23,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:23,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:23,108 INFO L87 Difference]: Start difference. First operand 524 states and 1659 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-03-11 00:22:23,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:23,464 INFO L93 Difference]: Finished difference Result 1149 states and 3311 transitions. [2021-03-11 00:22:23,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:22:23,468 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 27 [2021-03-11 00:22:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:23,472 INFO L225 Difference]: With dead ends: 1149 [2021-03-11 00:22:23,472 INFO L226 Difference]: Without dead ends: 1145 [2021-03-11 00:22:23,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 242.0ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:23,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-03-11 00:22:23,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 528. [2021-03-11 00:22:23,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.159392789373814) internal successors, (1665), 527 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:23,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1665 transitions. [2021-03-11 00:22:23,487 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1665 transitions. Word has length 27 [2021-03-11 00:22:23,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:23,487 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 1665 transitions. [2021-03-11 00:22:23,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-03-11 00:22:23,488 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1665 transitions. [2021-03-11 00:22:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:23,490 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:23,490 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:23,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:23,703 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:23,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:23,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1159578392, now seen corresponding path program 3 times [2021-03-11 00:22:23,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:23,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731487495] [2021-03-11 00:22:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:23,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731487495] [2021-03-11 00:22:23,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097861598] [2021-03-11 00:22:23,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:23,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:22:23,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:23,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:23,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:23,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:23,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-11 00:22:23,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553145404] [2021-03-11 00:22:23,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:23,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:23,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:23,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:23,812 INFO L87 Difference]: Start difference. First operand 528 states and 1665 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-03-11 00:22:23,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:23,962 INFO L93 Difference]: Finished difference Result 751 states and 2328 transitions. [2021-03-11 00:22:23,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:22:23,963 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2021-03-11 00:22:23,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:23,965 INFO L225 Difference]: With dead ends: 751 [2021-03-11 00:22:23,965 INFO L226 Difference]: Without dead ends: 751 [2021-03-11 00:22:23,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:22:23,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-03-11 00:22:23,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 540. [2021-03-11 00:22:23,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 3.1521335807050095) internal successors, (1699), 539 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1699 transitions. [2021-03-11 00:22:23,979 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1699 transitions. Word has length 27 [2021-03-11 00:22:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:23,979 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1699 transitions. [2021-03-11 00:22:23,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-03-11 00:22:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1699 transitions. [2021-03-11 00:22:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:23,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:23,981 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:24,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:24,195 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:24,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:24,196 INFO L82 PathProgramCache]: Analyzing trace with hash -480090768, now seen corresponding path program 8 times [2021-03-11 00:22:24,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:24,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455138284] [2021-03-11 00:22:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:24,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455138284] [2021-03-11 00:22:24,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657472282] [2021-03-11 00:22:24,236 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 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 [2021-03-11 00:22:24,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:24,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:24,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:24,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:24,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:24,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:22:24,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849271972] [2021-03-11 00:22:24,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:24,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:24,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:24,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:24,322 INFO L87 Difference]: Start difference. First operand 540 states and 1699 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:24,499 INFO L93 Difference]: Finished difference Result 983 states and 2946 transitions. [2021-03-11 00:22:24,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:22:24,500 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:24,503 INFO L225 Difference]: With dead ends: 983 [2021-03-11 00:22:24,503 INFO L226 Difference]: Without dead ends: 971 [2021-03-11 00:22:24,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:22:24,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-03-11 00:22:24,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 558. [2021-03-11 00:22:24,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.1382405745062836) internal successors, (1748), 557 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:24,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1748 transitions. [2021-03-11 00:22:24,514 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1748 transitions. Word has length 27 [2021-03-11 00:22:24,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:24,514 INFO L480 AbstractCegarLoop]: Abstraction has 558 states and 1748 transitions. [2021-03-11 00:22:24,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:24,514 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1748 transitions. [2021-03-11 00:22:24,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:24,515 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:24,515 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:24,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:24,731 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:24,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:24,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1407034092, now seen corresponding path program 9 times [2021-03-11 00:22:24,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:24,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443460871] [2021-03-11 00:22:24,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:24,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443460871] [2021-03-11 00:22:24,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478132901] [2021-03-11 00:22:24,762 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 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 [2021-03-11 00:22:24,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:22:24,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:24,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:24,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:24,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:24,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:22:24,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745441216] [2021-03-11 00:22:24,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:24,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:24,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:24,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:24,852 INFO L87 Difference]: Start difference. First operand 558 states and 1748 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-03-11 00:22:25,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:25,019 INFO L93 Difference]: Finished difference Result 983 states and 2948 transitions. [2021-03-11 00:22:25,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:22:25,020 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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 27 [2021-03-11 00:22:25,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:25,023 INFO L225 Difference]: With dead ends: 983 [2021-03-11 00:22:25,023 INFO L226 Difference]: Without dead ends: 983 [2021-03-11 00:22:25,023 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:22:25,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-03-11 00:22:25,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 567. [2021-03-11 00:22:25,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.1696113074204946) internal successors, (1794), 566 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:25,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1794 transitions. [2021-03-11 00:22:25,038 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1794 transitions. Word has length 27 [2021-03-11 00:22:25,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:25,038 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 1794 transitions. [2021-03-11 00:22:25,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-03-11 00:22:25,038 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1794 transitions. [2021-03-11 00:22:25,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:25,039 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:25,039 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:25,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-03-11 00:22:25,254 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:25,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:25,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2004028396, now seen corresponding path program 10 times [2021-03-11 00:22:25,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:25,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711261554] [2021-03-11 00:22:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:25,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711261554] [2021-03-11 00:22:25,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785469668] [2021-03-11 00:22:25,285 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 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 [2021-03-11 00:22:25,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:25,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:25,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:25,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:25,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:25,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:22:25,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092803753] [2021-03-11 00:22:25,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:25,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:25,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:25,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:25,382 INFO L87 Difference]: Start difference. First operand 567 states and 1794 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-03-11 00:22:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:25,850 INFO L93 Difference]: Finished difference Result 1871 states and 5394 transitions. [2021-03-11 00:22:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:22:25,850 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 27 [2021-03-11 00:22:25,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:25,859 INFO L225 Difference]: With dead ends: 1871 [2021-03-11 00:22:25,859 INFO L226 Difference]: Without dead ends: 1871 [2021-03-11 00:22:25,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 293.1ms TimeCoverageRelationStatistics Valid=357, Invalid=1125, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:22:25,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-03-11 00:22:25,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 640. [2021-03-11 00:22:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 3.29264475743349) internal successors, (2104), 639 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 2104 transitions. [2021-03-11 00:22:25,887 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 2104 transitions. Word has length 27 [2021-03-11 00:22:25,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:25,887 INFO L480 AbstractCegarLoop]: Abstraction has 640 states and 2104 transitions. [2021-03-11 00:22:25,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-03-11 00:22:25,887 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 2104 transitions. [2021-03-11 00:22:25,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:25,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:25,888 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:26,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:26,095 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:26,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:26,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1558477464, now seen corresponding path program 11 times [2021-03-11 00:22:26,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:26,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983596838] [2021-03-11 00:22:26,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:26,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983596838] [2021-03-11 00:22:26,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476466537] [2021-03-11 00:22:26,125 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 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 [2021-03-11 00:22:26,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:22:26,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:26,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:26,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:26,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:26,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:22:26,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835001723] [2021-03-11 00:22:26,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:26,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:26,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:26,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:26,239 INFO L87 Difference]: Start difference. First operand 640 states and 2104 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-03-11 00:22:26,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:26,647 INFO L93 Difference]: Finished difference Result 1774 states and 5180 transitions. [2021-03-11 00:22:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:22:26,648 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 27 [2021-03-11 00:22:26,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:26,655 INFO L225 Difference]: With dead ends: 1774 [2021-03-11 00:22:26,656 INFO L226 Difference]: Without dead ends: 1766 [2021-03-11 00:22:26,656 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 253.7ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:22:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-03-11 00:22:26,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 628. [2021-03-11 00:22:26,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.291866028708134) internal successors, (2064), 627 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2064 transitions. [2021-03-11 00:22:26,672 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2064 transitions. Word has length 27 [2021-03-11 00:22:26,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:26,672 INFO L480 AbstractCegarLoop]: Abstraction has 628 states and 2064 transitions. [2021-03-11 00:22:26,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-03-11 00:22:26,672 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2064 transitions. [2021-03-11 00:22:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:26,673 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:26,673 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:26,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-03-11 00:22:26,879 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:26,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:26,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1799894256, now seen corresponding path program 12 times [2021-03-11 00:22:26,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:26,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003820461] [2021-03-11 00:22:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:26,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003820461] [2021-03-11 00:22:26,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214770353] [2021-03-11 00:22:26,911 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:22:26,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:22:26,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:26,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:26,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:27,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:27,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:22:27,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404229696] [2021-03-11 00:22:27,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:27,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:27,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:27,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:27,006 INFO L87 Difference]: Start difference. First operand 628 states and 2064 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:27,433 INFO L93 Difference]: Finished difference Result 1916 states and 5637 transitions. [2021-03-11 00:22:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:22:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:27,436 INFO L225 Difference]: With dead ends: 1916 [2021-03-11 00:22:27,436 INFO L226 Difference]: Without dead ends: 1916 [2021-03-11 00:22:27,437 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:22:27,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-03-11 00:22:27,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 645. [2021-03-11 00:22:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.340062111801242) internal successors, (2151), 644 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2151 transitions. [2021-03-11 00:22:27,467 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2151 transitions. Word has length 27 [2021-03-11 00:22:27,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:27,467 INFO L480 AbstractCegarLoop]: Abstraction has 645 states and 2151 transitions. [2021-03-11 00:22:27,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:27,467 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2151 transitions. [2021-03-11 00:22:27,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:27,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:27,469 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:27,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-03-11 00:22:27,683 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:27,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1036250512, now seen corresponding path program 13 times [2021-03-11 00:22:27,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:27,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099667497] [2021-03-11 00:22:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:27,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099667497] [2021-03-11 00:22:27,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060239086] [2021-03-11 00:22:27,715 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 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 [2021-03-11 00:22:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:27,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:27,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:27,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:27,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:22:27,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876140084] [2021-03-11 00:22:27,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:27,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:27,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:27,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:27,826 INFO L87 Difference]: Start difference. First operand 645 states and 2151 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:28,266 INFO L93 Difference]: Finished difference Result 1888 states and 5563 transitions. [2021-03-11 00:22:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:22:28,266 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:28,269 INFO L225 Difference]: With dead ends: 1888 [2021-03-11 00:22:28,269 INFO L226 Difference]: Without dead ends: 1888 [2021-03-11 00:22:28,270 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 278.3ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:22:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-03-11 00:22:28,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 635. [2021-03-11 00:22:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.326498422712934) internal successors, (2109), 634 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:28,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2109 transitions. [2021-03-11 00:22:28,285 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2109 transitions. Word has length 27 [2021-03-11 00:22:28,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:28,285 INFO L480 AbstractCegarLoop]: Abstraction has 635 states and 2109 transitions. [2021-03-11 00:22:28,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:28,285 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2109 transitions. [2021-03-11 00:22:28,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:28,286 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:28,286 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:28,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:28,495 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:28,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:28,495 INFO L82 PathProgramCache]: Analyzing trace with hash 904089908, now seen corresponding path program 14 times [2021-03-11 00:22:28,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:28,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909670468] [2021-03-11 00:22:28,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:28,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909670468] [2021-03-11 00:22:28,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471666243] [2021-03-11 00:22:28,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:22:28,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:28,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:28,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:28,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:28,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:28,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:22:28,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353574541] [2021-03-11 00:22:28,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:28,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:28,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:28,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:28,640 INFO L87 Difference]: Start difference. First operand 635 states and 2109 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:28,788 INFO L93 Difference]: Finished difference Result 912 states and 2859 transitions. [2021-03-11 00:22:28,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:22:28,789 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:28,790 INFO L225 Difference]: With dead ends: 912 [2021-03-11 00:22:28,790 INFO L226 Difference]: Without dead ends: 902 [2021-03-11 00:22:28,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:22:28,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-03-11 00:22:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 639. [2021-03-11 00:22:28,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.29153605015674) internal successors, (2100), 638 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:28,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2100 transitions. [2021-03-11 00:22:28,801 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2100 transitions. Word has length 27 [2021-03-11 00:22:28,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:28,801 INFO L480 AbstractCegarLoop]: Abstraction has 639 states and 2100 transitions. [2021-03-11 00:22:28,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:28,801 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2100 transitions. [2021-03-11 00:22:28,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:28,802 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:28,802 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:29,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:29,015 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:29,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:29,016 INFO L82 PathProgramCache]: Analyzing trace with hash -285121176, now seen corresponding path program 15 times [2021-03-11 00:22:29,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:29,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291339420] [2021-03-11 00:22:29,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:29,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291339420] [2021-03-11 00:22:29,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373547010] [2021-03-11 00:22:29,044 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 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 [2021-03-11 00:22:29,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:22:29,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:29,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:29,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:29,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:29,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:22:29,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431538267] [2021-03-11 00:22:29,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:29,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:29,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:29,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:29,142 INFO L87 Difference]: Start difference. First operand 639 states and 2100 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:29,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:29,501 INFO L93 Difference]: Finished difference Result 1623 states and 4845 transitions. [2021-03-11 00:22:29,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:22:29,501 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:29,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:29,504 INFO L225 Difference]: With dead ends: 1623 [2021-03-11 00:22:29,504 INFO L226 Difference]: Without dead ends: 1615 [2021-03-11 00:22:29,504 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:22:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-03-11 00:22:29,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 657. [2021-03-11 00:22:29,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.285060975609756) internal successors, (2155), 656 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2155 transitions. [2021-03-11 00:22:29,518 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2155 transitions. Word has length 27 [2021-03-11 00:22:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:29,518 INFO L480 AbstractCegarLoop]: Abstraction has 657 states and 2155 transitions. [2021-03-11 00:22:29,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:29,518 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2155 transitions. [2021-03-11 00:22:29,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:29,519 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:29,519 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:29,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:29,728 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:29,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:29,728 INFO L82 PathProgramCache]: Analyzing trace with hash 693436268, now seen corresponding path program 16 times [2021-03-11 00:22:29,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:29,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950898073] [2021-03-11 00:22:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:29,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950898073] [2021-03-11 00:22:29,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249552899] [2021-03-11 00:22:29,756 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:22:29,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:29,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:29,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:29,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:29,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:29,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:22:29,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424373836] [2021-03-11 00:22:29,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:29,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:29,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:29,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:29,849 INFO L87 Difference]: Start difference. First operand 657 states and 2155 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:30,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:30,238 INFO L93 Difference]: Finished difference Result 1707 states and 5021 transitions. [2021-03-11 00:22:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:22:30,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:30,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:30,242 INFO L225 Difference]: With dead ends: 1707 [2021-03-11 00:22:30,242 INFO L226 Difference]: Without dead ends: 1707 [2021-03-11 00:22:30,242 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:22:30,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-03-11 00:22:30,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 642. [2021-03-11 00:22:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 3.282371294851794) internal successors, (2104), 641 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:30,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2104 transitions. [2021-03-11 00:22:30,257 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2104 transitions. Word has length 27 [2021-03-11 00:22:30,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:30,257 INFO L480 AbstractCegarLoop]: Abstraction has 642 states and 2104 transitions. [2021-03-11 00:22:30,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:30,257 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2104 transitions. [2021-03-11 00:22:30,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:30,258 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:30,258 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:30,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-03-11 00:22:30,473 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:30,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:30,474 INFO L82 PathProgramCache]: Analyzing trace with hash 339248496, now seen corresponding path program 17 times [2021-03-11 00:22:30,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:30,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364379649] [2021-03-11 00:22:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:30,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364379649] [2021-03-11 00:22:30,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239867466] [2021-03-11 00:22:30,507 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:22:30,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:22:30,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:30,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:30,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:30,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:30,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:22:30,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779254037] [2021-03-11 00:22:30,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:30,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:30,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:30,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:30,581 INFO L87 Difference]: Start difference. First operand 642 states and 2104 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:30,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:30,811 INFO L93 Difference]: Finished difference Result 1202 states and 3649 transitions. [2021-03-11 00:22:30,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:22:30,812 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:30,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:30,814 INFO L225 Difference]: With dead ends: 1202 [2021-03-11 00:22:30,814 INFO L226 Difference]: Without dead ends: 1190 [2021-03-11 00:22:30,814 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:22:30,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-03-11 00:22:30,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 664. [2021-03-11 00:22:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 3.2654600301659125) internal successors, (2165), 663 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 2165 transitions. [2021-03-11 00:22:30,825 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 2165 transitions. Word has length 27 [2021-03-11 00:22:30,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:30,826 INFO L480 AbstractCegarLoop]: Abstraction has 664 states and 2165 transitions. [2021-03-11 00:22:30,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 2165 transitions. [2021-03-11 00:22:30,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:30,827 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:30,827 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:31,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:31,039 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:31,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:31,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1260950636, now seen corresponding path program 18 times [2021-03-11 00:22:31,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:31,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365668542] [2021-03-11 00:22:31,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:31,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365668542] [2021-03-11 00:22:31,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97092143] [2021-03-11 00:22:31,070 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 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 [2021-03-11 00:22:31,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:22:31,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:31,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:31,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:31,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:31,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:22:31,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545020769] [2021-03-11 00:22:31,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:31,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:31,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:31,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:31,164 INFO L87 Difference]: Start difference. First operand 664 states and 2165 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:31,422 INFO L93 Difference]: Finished difference Result 1451 states and 4277 transitions. [2021-03-11 00:22:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:22:31,423 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:31,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:31,425 INFO L225 Difference]: With dead ends: 1451 [2021-03-11 00:22:31,425 INFO L226 Difference]: Without dead ends: 1443 [2021-03-11 00:22:31,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:22:31,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-03-11 00:22:31,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 703. [2021-03-11 00:22:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.274928774928775) internal successors, (2299), 702 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2299 transitions. [2021-03-11 00:22:31,438 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2299 transitions. Word has length 27 [2021-03-11 00:22:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:31,438 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 2299 transitions. [2021-03-11 00:22:31,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2299 transitions. [2021-03-11 00:22:31,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:31,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:31,440 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:31,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-03-11 00:22:31,651 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:31,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:31,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2055459216, now seen corresponding path program 19 times [2021-03-11 00:22:31,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:31,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728024116] [2021-03-11 00:22:31,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:31,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728024116] [2021-03-11 00:22:31,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797739877] [2021-03-11 00:22:31,680 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 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 [2021-03-11 00:22:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:31,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:31,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:31,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:31,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:22:31,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558192577] [2021-03-11 00:22:31,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:31,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:31,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:31,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:31,770 INFO L87 Difference]: Start difference. First operand 703 states and 2299 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:32,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:32,073 INFO L93 Difference]: Finished difference Result 1579 states and 4588 transitions. [2021-03-11 00:22:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:22:32,074 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:32,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:32,088 INFO L225 Difference]: With dead ends: 1579 [2021-03-11 00:22:32,088 INFO L226 Difference]: Without dead ends: 1579 [2021-03-11 00:22:32,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:32,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-03-11 00:22:32,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 697. [2021-03-11 00:22:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.281609195402299) internal successors, (2284), 696 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:32,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2284 transitions. [2021-03-11 00:22:32,108 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2284 transitions. Word has length 27 [2021-03-11 00:22:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:32,108 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 2284 transitions. [2021-03-11 00:22:32,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:32,108 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2284 transitions. [2021-03-11 00:22:32,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:32,109 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:32,109 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:32,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:32,319 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:32,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1812947492, now seen corresponding path program 20 times [2021-03-11 00:22:32,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:32,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872220035] [2021-03-11 00:22:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:32,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872220035] [2021-03-11 00:22:32,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520243927] [2021-03-11 00:22:32,349 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 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 [2021-03-11 00:22:32,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:32,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:32,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:32,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:32,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:32,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:22:32,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62832778] [2021-03-11 00:22:32,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:32,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:32,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:32,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:32,442 INFO L87 Difference]: Start difference. First operand 697 states and 2284 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-03-11 00:22:32,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:32,700 INFO L93 Difference]: Finished difference Result 1913 states and 5956 transitions. [2021-03-11 00:22:32,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:22:32,701 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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 27 [2021-03-11 00:22:32,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:32,704 INFO L225 Difference]: With dead ends: 1913 [2021-03-11 00:22:32,704 INFO L226 Difference]: Without dead ends: 1913 [2021-03-11 00:22:32,705 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:22:32,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-03-11 00:22:32,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 898. [2021-03-11 00:22:32,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4247491638795986) internal successors, (3072), 897 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3072 transitions. [2021-03-11 00:22:32,722 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3072 transitions. Word has length 27 [2021-03-11 00:22:32,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:32,722 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3072 transitions. [2021-03-11 00:22:32,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-03-11 00:22:32,722 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3072 transitions. [2021-03-11 00:22:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:32,730 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:32,730 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:32,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-03-11 00:22:32,939 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1979075620, now seen corresponding path program 21 times [2021-03-11 00:22:32,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:32,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493870685] [2021-03-11 00:22:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:32,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493870685] [2021-03-11 00:22:32,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589385345] [2021-03-11 00:22:32,969 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 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 [2021-03-11 00:22:32,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:22:32,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:32,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:32,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:33,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:33,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:22:33,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795370111] [2021-03-11 00:22:33,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:33,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:33,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:33,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:33,071 INFO L87 Difference]: Start difference. First operand 898 states and 3072 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:33,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:33,305 INFO L93 Difference]: Finished difference Result 1741 states and 5401 transitions. [2021-03-11 00:22:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:22:33,305 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:33,309 INFO L225 Difference]: With dead ends: 1741 [2021-03-11 00:22:33,309 INFO L226 Difference]: Without dead ends: 1731 [2021-03-11 00:22:33,309 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:22:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-03-11 00:22:33,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 895. [2021-03-11 00:22:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4004474272930647) internal successors, (3040), 894 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:33,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3040 transitions. [2021-03-11 00:22:33,325 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3040 transitions. Word has length 27 [2021-03-11 00:22:33,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:33,325 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 3040 transitions. [2021-03-11 00:22:33,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:33,325 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3040 transitions. [2021-03-11 00:22:33,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:33,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:33,326 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:33,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:33,539 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:33,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:33,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1712063380, now seen corresponding path program 22 times [2021-03-11 00:22:33,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:33,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833627289] [2021-03-11 00:22:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:33,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833627289] [2021-03-11 00:22:33,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615077946] [2021-03-11 00:22:33,568 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:22:33,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:33,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:33,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:33,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:33,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:33,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:22:33,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200489859] [2021-03-11 00:22:33,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:33,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:33,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:33,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:33,658 INFO L87 Difference]: Start difference. First operand 895 states and 3040 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-03-11 00:22:33,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:33,961 INFO L93 Difference]: Finished difference Result 1821 states and 5773 transitions. [2021-03-11 00:22:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:22:33,961 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 27 [2021-03-11 00:22:33,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:33,964 INFO L225 Difference]: With dead ends: 1821 [2021-03-11 00:22:33,964 INFO L226 Difference]: Without dead ends: 1821 [2021-03-11 00:22:33,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:22:33,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-03-11 00:22:33,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 922. [2021-03-11 00:22:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.3832790445168297) internal successors, (3116), 921 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3116 transitions. [2021-03-11 00:22:33,981 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3116 transitions. Word has length 27 [2021-03-11 00:22:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:33,981 INFO L480 AbstractCegarLoop]: Abstraction has 922 states and 3116 transitions. [2021-03-11 00:22:33,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-03-11 00:22:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3116 transitions. [2021-03-11 00:22:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:33,983 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:33,983 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:34,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-03-11 00:22:34,197 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:34,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:34,197 INFO L82 PathProgramCache]: Analyzing trace with hash -406491114, now seen corresponding path program 23 times [2021-03-11 00:22:34,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:34,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120054663] [2021-03-11 00:22:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:34,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120054663] [2021-03-11 00:22:34,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262126845] [2021-03-11 00:22:34,227 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 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 [2021-03-11 00:22:34,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:34,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:34,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:34,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:34,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:34,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:22:34,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746605416] [2021-03-11 00:22:34,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:34,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:34,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:34,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:34,329 INFO L87 Difference]: Start difference. First operand 922 states and 3116 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:34,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:34,486 INFO L93 Difference]: Finished difference Result 1342 states and 4285 transitions. [2021-03-11 00:22:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:22:34,486 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:34,489 INFO L225 Difference]: With dead ends: 1342 [2021-03-11 00:22:34,489 INFO L226 Difference]: Without dead ends: 1311 [2021-03-11 00:22:34,489 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:22:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-03-11 00:22:34,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 986. [2021-03-11 00:22:34,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.3573604060913707) internal successors, (3307), 985 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3307 transitions. [2021-03-11 00:22:34,518 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3307 transitions. Word has length 27 [2021-03-11 00:22:34,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:34,518 INFO L480 AbstractCegarLoop]: Abstraction has 986 states and 3307 transitions. [2021-03-11 00:22:34,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:34,518 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3307 transitions. [2021-03-11 00:22:34,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:34,519 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:34,520 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:34,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-03-11 00:22:34,734 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:34,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:34,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1176867492, now seen corresponding path program 24 times [2021-03-11 00:22:34,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:34,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007137696] [2021-03-11 00:22:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:34,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007137696] [2021-03-11 00:22:34,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630525482] [2021-03-11 00:22:34,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:22:34,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:22:34,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:34,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:34,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:34,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:34,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:22:34,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274235656] [2021-03-11 00:22:34,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:34,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:34,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:34,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:34,841 INFO L87 Difference]: Start difference. First operand 986 states and 3307 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:35,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:35,171 INFO L93 Difference]: Finished difference Result 2119 states and 6592 transitions. [2021-03-11 00:22:35,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:22:35,171 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:35,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:35,175 INFO L225 Difference]: With dead ends: 2119 [2021-03-11 00:22:35,175 INFO L226 Difference]: Without dead ends: 2115 [2021-03-11 00:22:35,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:22:35,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-03-11 00:22:35,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1074. [2021-03-11 00:22:35,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.341099720410065) internal successors, (3585), 1073 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:35,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3585 transitions. [2021-03-11 00:22:35,194 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3585 transitions. Word has length 27 [2021-03-11 00:22:35,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:35,194 INFO L480 AbstractCegarLoop]: Abstraction has 1074 states and 3585 transitions. [2021-03-11 00:22:35,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:35,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3585 transitions. [2021-03-11 00:22:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:35,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:35,196 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:35,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-11 00:22:35,411 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:35,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:35,412 INFO L82 PathProgramCache]: Analyzing trace with hash -198310048, now seen corresponding path program 25 times [2021-03-11 00:22:35,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:35,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566116775] [2021-03-11 00:22:35,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:35,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566116775] [2021-03-11 00:22:35,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783272724] [2021-03-11 00:22:35,440 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:22:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:35,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:35,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:35,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:22:35,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757947925] [2021-03-11 00:22:35,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:35,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:35,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:35,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:35,517 INFO L87 Difference]: Start difference. First operand 1074 states and 3585 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:35,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:35,897 INFO L93 Difference]: Finished difference Result 2273 states and 6985 transitions. [2021-03-11 00:22:35,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:22:35,897 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:35,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:35,901 INFO L225 Difference]: With dead ends: 2273 [2021-03-11 00:22:35,901 INFO L226 Difference]: Without dead ends: 2273 [2021-03-11 00:22:35,901 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:22:35,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-03-11 00:22:35,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1032. [2021-03-11 00:22:35,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 3.344325897187197) internal successors, (3448), 1031 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 3448 transitions. [2021-03-11 00:22:35,919 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 3448 transitions. Word has length 27 [2021-03-11 00:22:35,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:35,919 INFO L480 AbstractCegarLoop]: Abstraction has 1032 states and 3448 transitions. [2021-03-11 00:22:35,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:35,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 3448 transitions. [2021-03-11 00:22:35,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:35,921 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:35,921 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:36,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-03-11 00:22:36,132 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:36,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:36,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2016185652, now seen corresponding path program 26 times [2021-03-11 00:22:36,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:36,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611526585] [2021-03-11 00:22:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:36,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611526585] [2021-03-11 00:22:36,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343208247] [2021-03-11 00:22:36,162 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 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 [2021-03-11 00:22:36,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:36,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:36,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:36,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:36,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:36,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:22:36,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969492533] [2021-03-11 00:22:36,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:36,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:36,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:36,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:36,244 INFO L87 Difference]: Start difference. First operand 1032 states and 3448 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:36,495 INFO L93 Difference]: Finished difference Result 2014 states and 6277 transitions. [2021-03-11 00:22:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:22:36,496 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:36,498 INFO L225 Difference]: With dead ends: 2014 [2021-03-11 00:22:36,498 INFO L226 Difference]: Without dead ends: 2014 [2021-03-11 00:22:36,498 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:22:36,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-03-11 00:22:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1044. [2021-03-11 00:22:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.340364333652924) internal successors, (3484), 1043 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3484 transitions. [2021-03-11 00:22:36,516 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3484 transitions. Word has length 27 [2021-03-11 00:22:36,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:36,516 INFO L480 AbstractCegarLoop]: Abstraction has 1044 states and 3484 transitions. [2021-03-11 00:22:36,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:36,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3484 transitions. [2021-03-11 00:22:36,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:36,518 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:36,518 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:36,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-11 00:22:36,729 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:36,730 INFO L82 PathProgramCache]: Analyzing trace with hash -499902228, now seen corresponding path program 27 times [2021-03-11 00:22:36,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:36,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190244428] [2021-03-11 00:22:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:36,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190244428] [2021-03-11 00:22:36,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430834503] [2021-03-11 00:22:36,755 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:22:36,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:22:36,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:36,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:36,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:36,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:36,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:22:36,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336948489] [2021-03-11 00:22:36,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:22:36,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:36,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:22:36,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:22:36,826 INFO L87 Difference]: Start difference. First operand 1044 states and 3484 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:37,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:37,034 INFO L93 Difference]: Finished difference Result 1776 states and 5488 transitions. [2021-03-11 00:22:37,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:22:37,035 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:37,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:37,037 INFO L225 Difference]: With dead ends: 1776 [2021-03-11 00:22:37,037 INFO L226 Difference]: Without dead ends: 1764 [2021-03-11 00:22:37,037 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:22:37,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2021-03-11 00:22:37,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1102. [2021-03-11 00:22:37,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.321525885558583) internal successors, (3657), 1101 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3657 transitions. [2021-03-11 00:22:37,055 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3657 transitions. Word has length 27 [2021-03-11 00:22:37,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:37,056 INFO L480 AbstractCegarLoop]: Abstraction has 1102 states and 3657 transitions. [2021-03-11 00:22:37,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:37,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3657 transitions. [2021-03-11 00:22:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:37,057 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:37,058 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:37,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-11 00:22:37,271 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:37,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:37,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1595195728, now seen corresponding path program 28 times [2021-03-11 00:22:37,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:37,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301988236] [2021-03-11 00:22:37,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:37,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301988236] [2021-03-11 00:22:37,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099300090] [2021-03-11 00:22:37,298 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 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 [2021-03-11 00:22:37,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:37,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:37,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:37,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:37,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:37,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:22:37,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056960804] [2021-03-11 00:22:37,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:22:37,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:37,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:22:37,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:22:37,362 INFO L87 Difference]: Start difference. First operand 1102 states and 3657 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:37,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:37,608 INFO L93 Difference]: Finished difference Result 1940 states and 5945 transitions. [2021-03-11 00:22:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:22:37,609 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:37,611 INFO L225 Difference]: With dead ends: 1940 [2021-03-11 00:22:37,611 INFO L226 Difference]: Without dead ends: 1940 [2021-03-11 00:22:37,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:22:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-03-11 00:22:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1158. [2021-03-11 00:22:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.3094209161624892) internal successors, (3829), 1157 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3829 transitions. [2021-03-11 00:22:37,627 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3829 transitions. Word has length 27 [2021-03-11 00:22:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:37,627 INFO L480 AbstractCegarLoop]: Abstraction has 1158 states and 3829 transitions. [2021-03-11 00:22:37,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3829 transitions. [2021-03-11 00:22:37,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:37,629 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:37,629 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:37,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-03-11 00:22:37,830 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:37,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:37,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1507209712, now seen corresponding path program 3 times [2021-03-11 00:22:37,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:37,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147735794] [2021-03-11 00:22:37,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:37,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147735794] [2021-03-11 00:22:37,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807674511] [2021-03-11 00:22:37,860 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 [2021-03-11 00:22:37,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:22:37,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:37,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:37,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:37,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:37,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:22:37,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912532094] [2021-03-11 00:22:37,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:37,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:37,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:37,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:37,948 INFO L87 Difference]: Start difference. First operand 1158 states and 3829 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:38,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:38,211 INFO L93 Difference]: Finished difference Result 1759 states and 5449 transitions. [2021-03-11 00:22:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:22:38,211 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:38,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:38,214 INFO L225 Difference]: With dead ends: 1759 [2021-03-11 00:22:38,214 INFO L226 Difference]: Without dead ends: 1759 [2021-03-11 00:22:38,214 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:22:38,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2021-03-11 00:22:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1180. [2021-03-11 00:22:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.3078880407124682) internal successors, (3900), 1179 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3900 transitions. [2021-03-11 00:22:38,230 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3900 transitions. Word has length 27 [2021-03-11 00:22:38,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:38,230 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 3900 transitions. [2021-03-11 00:22:38,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:38,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3900 transitions. [2021-03-11 00:22:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:38,232 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:38,232 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:38,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:38,446 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:38,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:38,446 INFO L82 PathProgramCache]: Analyzing trace with hash 877590964, now seen corresponding path program 4 times [2021-03-11 00:22:38,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:38,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891981776] [2021-03-11 00:22:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:38,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891981776] [2021-03-11 00:22:38,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989506825] [2021-03-11 00:22:38,472 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 [2021-03-11 00:22:38,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:38,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:38,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:38,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:38,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:38,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:22:38,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442631515] [2021-03-11 00:22:38,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:22:38,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:38,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:22:38,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:22:38,542 INFO L87 Difference]: Start difference. First operand 1180 states and 3900 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:38,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:38,648 INFO L93 Difference]: Finished difference Result 1872 states and 5977 transitions. [2021-03-11 00:22:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:22:38,648 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:38,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:38,651 INFO L225 Difference]: With dead ends: 1872 [2021-03-11 00:22:38,651 INFO L226 Difference]: Without dead ends: 1854 [2021-03-11 00:22:38,651 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:22:38,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-03-11 00:22:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1389. [2021-03-11 00:22:38,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1388 states have (on average 3.3746397694524495) internal successors, (4684), 1388 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:38,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 4684 transitions. [2021-03-11 00:22:38,669 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 4684 transitions. Word has length 27 [2021-03-11 00:22:38,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:38,669 INFO L480 AbstractCegarLoop]: Abstraction has 1389 states and 4684 transitions. [2021-03-11 00:22:38,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:38,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 4684 transitions. [2021-03-11 00:22:38,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:38,671 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:38,671 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:38,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-03-11 00:22:38,871 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:38,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:38,871 INFO L82 PathProgramCache]: Analyzing trace with hash 118622872, now seen corresponding path program 5 times [2021-03-11 00:22:38,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:38,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198790891] [2021-03-11 00:22:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:38,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198790891] [2021-03-11 00:22:38,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432256008] [2021-03-11 00:22:38,895 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 [2021-03-11 00:22:38,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:22:38,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:38,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:38,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:38,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:38,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-03-11 00:22:38,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104928097] [2021-03-11 00:22:38,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:22:38,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:38,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:22:38,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:22:38,966 INFO L87 Difference]: Start difference. First operand 1389 states and 4684 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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) [2021-03-11 00:22:39,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:39,098 INFO L93 Difference]: Finished difference Result 2133 states and 6693 transitions. [2021-03-11 00:22:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:22:39,098 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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 27 [2021-03-11 00:22:39,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:39,101 INFO L225 Difference]: With dead ends: 2133 [2021-03-11 00:22:39,101 INFO L226 Difference]: Without dead ends: 2133 [2021-03-11 00:22:39,101 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:22:39,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-03-11 00:22:39,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1392. [2021-03-11 00:22:39,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.3608914450035945) internal successors, (4675), 1391 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:39,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4675 transitions. [2021-03-11 00:22:39,121 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4675 transitions. Word has length 27 [2021-03-11 00:22:39,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:39,121 INFO L480 AbstractCegarLoop]: Abstraction has 1392 states and 4675 transitions. [2021-03-11 00:22:39,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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) [2021-03-11 00:22:39,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4675 transitions. [2021-03-11 00:22:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:39,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:39,123 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:39,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:39,337 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:39,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:39,338 INFO L82 PathProgramCache]: Analyzing trace with hash 260141608, now seen corresponding path program 6 times [2021-03-11 00:22:39,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:39,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615148122] [2021-03-11 00:22:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:39,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615148122] [2021-03-11 00:22:39,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195953620] [2021-03-11 00:22:39,367 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) [2021-03-11 00:22:39,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:22:39,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:39,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:39,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:39,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:39,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-11 00:22:39,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297560903] [2021-03-11 00:22:39,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:39,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:39,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:39,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:39,449 INFO L87 Difference]: Start difference. First operand 1392 states and 4675 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:39,674 INFO L93 Difference]: Finished difference Result 2050 states and 6469 transitions. [2021-03-11 00:22:39,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:22:39,674 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:39,677 INFO L225 Difference]: With dead ends: 2050 [2021-03-11 00:22:39,677 INFO L226 Difference]: Without dead ends: 2046 [2021-03-11 00:22:39,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:22:39,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-03-11 00:22:39,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1392. [2021-03-11 00:22:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.359453630481668) internal successors, (4673), 1391 states have internal predecessors, (4673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4673 transitions. [2021-03-11 00:22:39,696 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4673 transitions. Word has length 27 [2021-03-11 00:22:39,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:39,696 INFO L480 AbstractCegarLoop]: Abstraction has 1392 states and 4673 transitions. [2021-03-11 00:22:39,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:39,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4673 transitions. [2021-03-11 00:22:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:39,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:39,698 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:39,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:39,899 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:39,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:39,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1708393328, now seen corresponding path program 7 times [2021-03-11 00:22:39,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:39,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208962510] [2021-03-11 00:22:39,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:39,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208962510] [2021-03-11 00:22:39,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794991943] [2021-03-11 00:22:39,929 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 [2021-03-11 00:22:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:39,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:39,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:40,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:40,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-11 00:22:40,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214515139] [2021-03-11 00:22:40,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:40,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:40,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:40,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:40,011 INFO L87 Difference]: Start difference. First operand 1392 states and 4673 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:40,238 INFO L93 Difference]: Finished difference Result 2257 states and 7002 transitions. [2021-03-11 00:22:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:22:40,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:40,241 INFO L225 Difference]: With dead ends: 2257 [2021-03-11 00:22:40,241 INFO L226 Difference]: Without dead ends: 2257 [2021-03-11 00:22:40,242 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:22:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-03-11 00:22:40,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1442. [2021-03-11 00:22:40,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3587786259541983) internal successors, (4840), 1441 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4840 transitions. [2021-03-11 00:22:40,262 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4840 transitions. Word has length 27 [2021-03-11 00:22:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:40,262 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4840 transitions. [2021-03-11 00:22:40,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4840 transitions. [2021-03-11 00:22:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:40,264 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:40,264 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:40,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:40,470 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:40,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:40,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1264325580, now seen corresponding path program 8 times [2021-03-11 00:22:40,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:40,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498869301] [2021-03-11 00:22:40,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:40,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498869301] [2021-03-11 00:22:40,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783226821] [2021-03-11 00:22:40,499 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 [2021-03-11 00:22:40,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:40,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:40,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:40,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:40,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:40,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-03-11 00:22:40,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431850297] [2021-03-11 00:22:40,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:22:40,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:40,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:22:40,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:22:40,567 INFO L87 Difference]: Start difference. First operand 1442 states and 4840 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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) [2021-03-11 00:22:40,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:40,704 INFO L93 Difference]: Finished difference Result 2263 states and 7241 transitions. [2021-03-11 00:22:40,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:22:40,704 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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 27 [2021-03-11 00:22:40,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:40,707 INFO L225 Difference]: With dead ends: 2263 [2021-03-11 00:22:40,707 INFO L226 Difference]: Without dead ends: 2257 [2021-03-11 00:22:40,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:22:40,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-03-11 00:22:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1535. [2021-03-11 00:22:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3872229465449806) internal successors, (5196), 1534 states have internal predecessors, (5196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5196 transitions. [2021-03-11 00:22:40,729 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5196 transitions. Word has length 27 [2021-03-11 00:22:40,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:40,729 INFO L480 AbstractCegarLoop]: Abstraction has 1535 states and 5196 transitions. [2021-03-11 00:22:40,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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) [2021-03-11 00:22:40,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5196 transitions. [2021-03-11 00:22:40,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:40,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:40,731 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:40,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:40,932 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:40,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:40,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1995631268, now seen corresponding path program 9 times [2021-03-11 00:22:40,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:40,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928902303] [2021-03-11 00:22:40,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:40,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928902303] [2021-03-11 00:22:40,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427680548] [2021-03-11 00:22:40,956 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) [2021-03-11 00:22:40,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:22:40,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:40,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:40,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:41,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:41,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-03-11 00:22:41,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634124704] [2021-03-11 00:22:41,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:22:41,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:41,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:22:41,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:22:41,028 INFO L87 Difference]: Start difference. First operand 1535 states and 5196 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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) [2021-03-11 00:22:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:41,165 INFO L93 Difference]: Finished difference Result 2415 states and 7685 transitions. [2021-03-11 00:22:41,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:22:41,165 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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 27 [2021-03-11 00:22:41,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:41,168 INFO L225 Difference]: With dead ends: 2415 [2021-03-11 00:22:41,168 INFO L226 Difference]: Without dead ends: 2415 [2021-03-11 00:22:41,168 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:22:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-03-11 00:22:41,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1459. [2021-03-11 00:22:41,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 3.347736625514403) internal successors, (4881), 1458 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 4881 transitions. [2021-03-11 00:22:41,198 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 4881 transitions. Word has length 27 [2021-03-11 00:22:41,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:41,198 INFO L480 AbstractCegarLoop]: Abstraction has 1459 states and 4881 transitions. [2021-03-11 00:22:41,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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) [2021-03-11 00:22:41,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 4881 transitions. [2021-03-11 00:22:41,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:41,200 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:41,200 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:41,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-03-11 00:22:41,411 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:41,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:41,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1854112532, now seen corresponding path program 10 times [2021-03-11 00:22:41,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:41,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850070003] [2021-03-11 00:22:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:41,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850070003] [2021-03-11 00:22:41,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431945057] [2021-03-11 00:22:41,446 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 [2021-03-11 00:22:41,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:41,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:41,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:41,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:41,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:41,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-11 00:22:41,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089869447] [2021-03-11 00:22:41,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:41,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:41,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:41,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:41,525 INFO L87 Difference]: Start difference. First operand 1459 states and 4881 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:41,765 INFO L93 Difference]: Finished difference Result 2204 states and 6862 transitions. [2021-03-11 00:22:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:22:41,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:41,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:41,769 INFO L225 Difference]: With dead ends: 2204 [2021-03-11 00:22:41,769 INFO L226 Difference]: Without dead ends: 2200 [2021-03-11 00:22:41,769 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:22:41,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-03-11 00:22:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1419. [2021-03-11 00:22:41,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.349083215796897) internal successors, (4749), 1418 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4749 transitions. [2021-03-11 00:22:41,792 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4749 transitions. Word has length 27 [2021-03-11 00:22:41,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:41,792 INFO L480 AbstractCegarLoop]: Abstraction has 1419 states and 4749 transitions. [2021-03-11 00:22:41,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:41,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4749 transitions. [2021-03-11 00:22:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:41,794 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:41,794 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:42,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-11 00:22:42,007 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:42,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:42,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1856436888, now seen corresponding path program 11 times [2021-03-11 00:22:42,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:42,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964065702] [2021-03-11 00:22:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:42,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964065702] [2021-03-11 00:22:42,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514423435] [2021-03-11 00:22:42,034 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 [2021-03-11 00:22:42,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:22:42,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:42,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:42,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:42,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:42,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:22:42,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755953792] [2021-03-11 00:22:42,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:22:42,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:42,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:22:42,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:22:42,105 INFO L87 Difference]: Start difference. First operand 1419 states and 4749 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:42,248 INFO L93 Difference]: Finished difference Result 2022 states and 6496 transitions. [2021-03-11 00:22:42,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:22:42,248 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:42,251 INFO L225 Difference]: With dead ends: 2022 [2021-03-11 00:22:42,251 INFO L226 Difference]: Without dead ends: 2022 [2021-03-11 00:22:42,251 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:22:42,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-03-11 00:22:42,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1518. [2021-03-11 00:22:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3698088332234675) internal successors, (5112), 1517 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5112 transitions. [2021-03-11 00:22:42,272 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5112 transitions. Word has length 27 [2021-03-11 00:22:42,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:42,272 INFO L480 AbstractCegarLoop]: Abstraction has 1518 states and 5112 transitions. [2021-03-11 00:22:42,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5112 transitions. [2021-03-11 00:22:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:42,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:42,275 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:42,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-03-11 00:22:42,490 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:42,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:42,491 INFO L82 PathProgramCache]: Analyzing trace with hash 216767728, now seen corresponding path program 12 times [2021-03-11 00:22:42,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:42,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737467611] [2021-03-11 00:22:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:42,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737467611] [2021-03-11 00:22:42,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276375559] [2021-03-11 00:22:42,520 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) [2021-03-11 00:22:42,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:22:42,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:42,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:42,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:42,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:42,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:22:42,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229028044] [2021-03-11 00:22:42,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:42,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:42,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:42,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:42,600 INFO L87 Difference]: Start difference. First operand 1518 states and 5112 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:42,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:42,806 INFO L93 Difference]: Finished difference Result 2124 states and 6748 transitions. [2021-03-11 00:22:42,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:22:42,807 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:42,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:42,809 INFO L225 Difference]: With dead ends: 2124 [2021-03-11 00:22:42,810 INFO L226 Difference]: Without dead ends: 2112 [2021-03-11 00:22:42,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:22:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-03-11 00:22:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1536. [2021-03-11 00:22:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 3.3674267100977198) internal successors, (5169), 1535 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:42,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 5169 transitions. [2021-03-11 00:22:42,840 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 5169 transitions. Word has length 27 [2021-03-11 00:22:42,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:42,840 INFO L480 AbstractCegarLoop]: Abstraction has 1536 states and 5169 transitions. [2021-03-11 00:22:42,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:42,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 5169 transitions. [2021-03-11 00:22:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:42,843 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:42,843 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:43,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-11 00:22:43,043 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:43,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:43,044 INFO L82 PathProgramCache]: Analyzing trace with hash -670090772, now seen corresponding path program 4 times [2021-03-11 00:22:43,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:43,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703101694] [2021-03-11 00:22:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:43,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703101694] [2021-03-11 00:22:43,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982557943] [2021-03-11 00:22:43,071 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:22:43,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:43,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:43,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:43,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:43,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:43,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-11 00:22:43,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812121640] [2021-03-11 00:22:43,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:43,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:43,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:43,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:43,157 INFO L87 Difference]: Start difference. First operand 1536 states and 5169 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-03-11 00:22:43,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:43,438 INFO L93 Difference]: Finished difference Result 2332 states and 7312 transitions. [2021-03-11 00:22:43,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:22:43,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2021-03-11 00:22:43,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:43,442 INFO L225 Difference]: With dead ends: 2332 [2021-03-11 00:22:43,442 INFO L226 Difference]: Without dead ends: 2320 [2021-03-11 00:22:43,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:22:43,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-03-11 00:22:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1566. [2021-03-11 00:22:43,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.375079872204473) internal successors, (5282), 1565 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:43,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5282 transitions. [2021-03-11 00:22:43,464 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5282 transitions. Word has length 27 [2021-03-11 00:22:43,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:43,464 INFO L480 AbstractCegarLoop]: Abstraction has 1566 states and 5282 transitions. [2021-03-11 00:22:43,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-03-11 00:22:43,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5282 transitions. [2021-03-11 00:22:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:43,466 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:43,466 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:43,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-03-11 00:22:43,679 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:43,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:43,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1401396460, now seen corresponding path program 5 times [2021-03-11 00:22:43,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:43,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922889383] [2021-03-11 00:22:43,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:43,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922889383] [2021-03-11 00:22:43,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263048576] [2021-03-11 00:22:43,700 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 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 [2021-03-11 00:22:43,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:22:43,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:43,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:43,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:43,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:43,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-11 00:22:43,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477853666] [2021-03-11 00:22:43,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:43,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:43,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:43,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:43,798 INFO L87 Difference]: Start difference. First operand 1566 states and 5282 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-03-11 00:22:44,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:44,038 INFO L93 Difference]: Finished difference Result 2490 states and 7823 transitions. [2021-03-11 00:22:44,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:22:44,038 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2021-03-11 00:22:44,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:44,041 INFO L225 Difference]: With dead ends: 2490 [2021-03-11 00:22:44,041 INFO L226 Difference]: Without dead ends: 2490 [2021-03-11 00:22:44,041 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:22:44,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-03-11 00:22:44,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 1435. [2021-03-11 00:22:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 3.311715481171548) internal successors, (4749), 1434 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4749 transitions. [2021-03-11 00:22:44,062 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4749 transitions. Word has length 27 [2021-03-11 00:22:44,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:44,062 INFO L480 AbstractCegarLoop]: Abstraction has 1435 states and 4749 transitions. [2021-03-11 00:22:44,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-03-11 00:22:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4749 transitions. [2021-03-11 00:22:44,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:44,064 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:44,064 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:44,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-03-11 00:22:44,264 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:44,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:44,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1810785004, now seen corresponding path program 13 times [2021-03-11 00:22:44,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:44,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893293806] [2021-03-11 00:22:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:44,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893293806] [2021-03-11 00:22:44,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338311956] [2021-03-11 00:22:44,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:44,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:44,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:44,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:44,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:22:44,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867357359] [2021-03-11 00:22:44,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:44,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:44,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:44,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:44,382 INFO L87 Difference]: Start difference. First operand 1435 states and 4749 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:44,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:44,656 INFO L93 Difference]: Finished difference Result 2497 states and 7799 transitions. [2021-03-11 00:22:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:22:44,656 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:44,659 INFO L225 Difference]: With dead ends: 2497 [2021-03-11 00:22:44,659 INFO L226 Difference]: Without dead ends: 2497 [2021-03-11 00:22:44,660 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:22:44,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-03-11 00:22:44,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1477. [2021-03-11 00:22:44,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.2981029810298104) internal successors, (4868), 1476 states have internal predecessors, (4868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:44,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4868 transitions. [2021-03-11 00:22:44,680 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4868 transitions. Word has length 27 [2021-03-11 00:22:44,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:44,680 INFO L480 AbstractCegarLoop]: Abstraction has 1477 states and 4868 transitions. [2021-03-11 00:22:44,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:44,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4868 transitions. [2021-03-11 00:22:44,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:44,682 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:44,682 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:44,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:44,895 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:44,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:44,895 INFO L82 PathProgramCache]: Analyzing trace with hash -168744536, now seen corresponding path program 14 times [2021-03-11 00:22:44,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:44,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749324737] [2021-03-11 00:22:44,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:44,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749324737] [2021-03-11 00:22:44,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527220538] [2021-03-11 00:22:44,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:44,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:44,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:44,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:44,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:45,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:45,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:22:45,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834583686] [2021-03-11 00:22:45,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:45,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:45,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:45,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:45,021 INFO L87 Difference]: Start difference. First operand 1477 states and 4868 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-03-11 00:22:45,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:45,490 INFO L93 Difference]: Finished difference Result 2724 states and 8387 transitions. [2021-03-11 00:22:45,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:22:45,490 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 27 [2021-03-11 00:22:45,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:45,493 INFO L225 Difference]: With dead ends: 2724 [2021-03-11 00:22:45,493 INFO L226 Difference]: Without dead ends: 2724 [2021-03-11 00:22:45,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 322.2ms TimeCoverageRelationStatistics Valid=412, Invalid=1394, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:22:45,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-03-11 00:22:45,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1533. [2021-03-11 00:22:45,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.3015665796344646) internal successors, (5058), 1532 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5058 transitions. [2021-03-11 00:22:45,515 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5058 transitions. Word has length 27 [2021-03-11 00:22:45,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:45,516 INFO L480 AbstractCegarLoop]: Abstraction has 1533 states and 5058 transitions. [2021-03-11 00:22:45,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-03-11 00:22:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5058 transitions. [2021-03-11 00:22:45,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:45,518 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:45,518 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:45,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-03-11 00:22:45,718 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:45,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:45,719 INFO L82 PathProgramCache]: Analyzing trace with hash 563716900, now seen corresponding path program 15 times [2021-03-11 00:22:45,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:45,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932258938] [2021-03-11 00:22:45,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:45,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932258938] [2021-03-11 00:22:45,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838608056] [2021-03-11 00:22:45,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:45,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:22:45,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:45,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:45,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:45,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:45,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:22:45,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642606881] [2021-03-11 00:22:45,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:45,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:45,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:45,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:45,847 INFO L87 Difference]: Start difference. First operand 1533 states and 5058 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-03-11 00:22:46,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:46,232 INFO L93 Difference]: Finished difference Result 2582 states and 8017 transitions. [2021-03-11 00:22:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:22:46,232 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 27 [2021-03-11 00:22:46,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:46,236 INFO L225 Difference]: With dead ends: 2582 [2021-03-11 00:22:46,236 INFO L226 Difference]: Without dead ends: 2578 [2021-03-11 00:22:46,236 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 247.1ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:22:46,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-03-11 00:22:46,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1487. [2021-03-11 00:22:46,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.2994616419919245) internal successors, (4903), 1486 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:46,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4903 transitions. [2021-03-11 00:22:46,257 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4903 transitions. Word has length 27 [2021-03-11 00:22:46,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:46,257 INFO L480 AbstractCegarLoop]: Abstraction has 1487 states and 4903 transitions. [2021-03-11 00:22:46,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-03-11 00:22:46,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4903 transitions. [2021-03-11 00:22:46,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:46,259 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:46,259 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:46,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:46,472 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:46,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:46,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1088595216, now seen corresponding path program 16 times [2021-03-11 00:22:46,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:46,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715301219] [2021-03-11 00:22:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:46,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715301219] [2021-03-11 00:22:46,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185533209] [2021-03-11 00:22:46,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:22:46,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:46,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:46,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:46,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:46,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:46,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:22:46,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468304815] [2021-03-11 00:22:46,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:46,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:46,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:46,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:46,589 INFO L87 Difference]: Start difference. First operand 1487 states and 4903 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:46,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:46,902 INFO L93 Difference]: Finished difference Result 2411 states and 7586 transitions. [2021-03-11 00:22:46,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:22:46,903 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:46,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:46,906 INFO L225 Difference]: With dead ends: 2411 [2021-03-11 00:22:46,906 INFO L226 Difference]: Without dead ends: 2411 [2021-03-11 00:22:46,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:22:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-03-11 00:22:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1471. [2021-03-11 00:22:46,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 3.3081632653061224) internal successors, (4863), 1470 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 4863 transitions. [2021-03-11 00:22:46,925 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 4863 transitions. Word has length 27 [2021-03-11 00:22:46,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:46,926 INFO L480 AbstractCegarLoop]: Abstraction has 1471 states and 4863 transitions. [2021-03-11 00:22:46,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 4863 transitions. [2021-03-11 00:22:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:46,928 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:46,928 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:47,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:47,128 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:47,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:47,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1331852852, now seen corresponding path program 6 times [2021-03-11 00:22:47,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:47,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423373778] [2021-03-11 00:22:47,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:47,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423373778] [2021-03-11 00:22:47,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497396177] [2021-03-11 00:22:47,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:22:47,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:22:47,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:47,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:47,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:47,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:47,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-11 00:22:47,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477962075] [2021-03-11 00:22:47,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:47,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:47,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:47,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:47,238 INFO L87 Difference]: Start difference. First operand 1471 states and 4863 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:47,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:47,456 INFO L93 Difference]: Finished difference Result 1987 states and 6138 transitions. [2021-03-11 00:22:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:22:47,456 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:47,458 INFO L225 Difference]: With dead ends: 1987 [2021-03-11 00:22:47,459 INFO L226 Difference]: Without dead ends: 1975 [2021-03-11 00:22:47,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:22:47,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-03-11 00:22:47,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1462. [2021-03-11 00:22:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.308008213552361) internal successors, (4833), 1461 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 4833 transitions. [2021-03-11 00:22:47,477 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 4833 transitions. Word has length 27 [2021-03-11 00:22:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:47,477 INFO L480 AbstractCegarLoop]: Abstraction has 1462 states and 4833 transitions. [2021-03-11 00:22:47,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:47,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 4833 transitions. [2021-03-11 00:22:47,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:47,479 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:47,479 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:47,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:47,680 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:47,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:47,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1010707988, now seen corresponding path program 7 times [2021-03-11 00:22:47,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:47,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133283860] [2021-03-11 00:22:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:47,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133283860] [2021-03-11 00:22:47,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44061477] [2021-03-11 00:22:47,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:47,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:47,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:47,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:47,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-11 00:22:47,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516351750] [2021-03-11 00:22:47,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:47,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:47,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:47,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:47,809 INFO L87 Difference]: Start difference. First operand 1462 states and 4833 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:48,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:48,042 INFO L93 Difference]: Finished difference Result 1951 states and 6027 transitions. [2021-03-11 00:22:48,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:22:48,043 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:48,045 INFO L225 Difference]: With dead ends: 1951 [2021-03-11 00:22:48,045 INFO L226 Difference]: Without dead ends: 1923 [2021-03-11 00:22:48,045 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:22:48,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-03-11 00:22:48,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1463. [2021-03-11 00:22:48,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 3.3071135430916554) internal successors, (4835), 1462 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:48,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4835 transitions. [2021-03-11 00:22:48,064 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4835 transitions. Word has length 27 [2021-03-11 00:22:48,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:48,065 INFO L480 AbstractCegarLoop]: Abstraction has 1463 states and 4835 transitions. [2021-03-11 00:22:48,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:48,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4835 transitions. [2021-03-11 00:22:48,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:48,067 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:48,067 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:48,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:48,275 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:48,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1924122076, now seen corresponding path program 8 times [2021-03-11 00:22:48,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:48,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995968831] [2021-03-11 00:22:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:48,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995968831] [2021-03-11 00:22:48,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529971359] [2021-03-11 00:22:48,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:48,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:48,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:48,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:48,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:48,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:48,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:22:48,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626442229] [2021-03-11 00:22:48,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:22:48,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:48,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:22:48,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:22:48,383 INFO L87 Difference]: Start difference. First operand 1463 states and 4835 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:48,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:48,571 INFO L93 Difference]: Finished difference Result 2417 states and 7513 transitions. [2021-03-11 00:22:48,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:22:48,571 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:48,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:48,574 INFO L225 Difference]: With dead ends: 2417 [2021-03-11 00:22:48,574 INFO L226 Difference]: Without dead ends: 2417 [2021-03-11 00:22:48,574 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:22:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-03-11 00:22:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1487. [2021-03-11 00:22:48,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.3250336473755047) internal successors, (4941), 1486 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4941 transitions. [2021-03-11 00:22:48,596 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4941 transitions. Word has length 27 [2021-03-11 00:22:48,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:48,596 INFO L480 AbstractCegarLoop]: Abstraction has 1487 states and 4941 transitions. [2021-03-11 00:22:48,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:48,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4941 transitions. [2021-03-11 00:22:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:48,598 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:48,598 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:48,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-03-11 00:22:48,812 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:48,813 INFO L82 PathProgramCache]: Analyzing trace with hash -782245740, now seen corresponding path program 9 times [2021-03-11 00:22:48,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:48,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399421518] [2021-03-11 00:22:48,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:48,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399421518] [2021-03-11 00:22:48,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8166648] [2021-03-11 00:22:48,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:48,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:22:48,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:48,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:48,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:48,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:48,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:22:48,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528457973] [2021-03-11 00:22:48,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:22:48,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:48,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:22:48,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:22:48,933 INFO L87 Difference]: Start difference. First operand 1487 states and 4941 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:49,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:49,132 INFO L93 Difference]: Finished difference Result 2191 states and 6835 transitions. [2021-03-11 00:22:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:22:49,133 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:49,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:49,135 INFO L225 Difference]: With dead ends: 2191 [2021-03-11 00:22:49,135 INFO L226 Difference]: Without dead ends: 2170 [2021-03-11 00:22:49,135 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:22:49,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-03-11 00:22:49,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1487. [2021-03-11 00:22:49,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.319650067294751) internal successors, (4933), 1486 states have internal predecessors, (4933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:49,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4933 transitions. [2021-03-11 00:22:49,155 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4933 transitions. Word has length 27 [2021-03-11 00:22:49,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:49,155 INFO L480 AbstractCegarLoop]: Abstraction has 1487 states and 4933 transitions. [2021-03-11 00:22:49,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:49,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4933 transitions. [2021-03-11 00:22:49,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:49,157 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:49,157 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:49,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:49,358 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:49,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:49,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1171437904, now seen corresponding path program 10 times [2021-03-11 00:22:49,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:49,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335475766] [2021-03-11 00:22:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:49,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335475766] [2021-03-11 00:22:49,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020987844] [2021-03-11 00:22:49,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:49,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:49,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:49,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:49,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:49,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:49,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-11 00:22:49,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559286246] [2021-03-11 00:22:49,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:49,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:49,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:49,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:49,471 INFO L87 Difference]: Start difference. First operand 1487 states and 4933 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-03-11 00:22:49,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:49,620 INFO L93 Difference]: Finished difference Result 1790 states and 5786 transitions. [2021-03-11 00:22:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:22:49,620 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2021-03-11 00:22:49,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:49,622 INFO L225 Difference]: With dead ends: 1790 [2021-03-11 00:22:49,622 INFO L226 Difference]: Without dead ends: 1790 [2021-03-11 00:22:49,622 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:22:49,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-03-11 00:22:49,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1467. [2021-03-11 00:22:49,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.319918144611187) internal successors, (4867), 1466 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 4867 transitions. [2021-03-11 00:22:49,639 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 4867 transitions. Word has length 27 [2021-03-11 00:22:49,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:49,639 INFO L480 AbstractCegarLoop]: Abstraction has 1467 states and 4867 transitions. [2021-03-11 00:22:49,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-03-11 00:22:49,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 4867 transitions. [2021-03-11 00:22:49,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:49,641 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:49,641 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:49,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-03-11 00:22:49,841 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:49,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:49,842 INFO L82 PathProgramCache]: Analyzing trace with hash -2112049896, now seen corresponding path program 11 times [2021-03-11 00:22:49,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:49,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796118184] [2021-03-11 00:22:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:49,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796118184] [2021-03-11 00:22:49,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642316517] [2021-03-11 00:22:49,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:49,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:22:49,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:49,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:49,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:49,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:49,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:22:49,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197496258] [2021-03-11 00:22:49,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:22:49,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:49,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:22:49,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:22:49,938 INFO L87 Difference]: Start difference. First operand 1467 states and 4867 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:50,091 INFO L93 Difference]: Finished difference Result 2556 states and 8173 transitions. [2021-03-11 00:22:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:22:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:50,095 INFO L225 Difference]: With dead ends: 2556 [2021-03-11 00:22:50,095 INFO L226 Difference]: Without dead ends: 2556 [2021-03-11 00:22:50,095 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:22:50,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-03-11 00:22:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1719. [2021-03-11 00:22:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 3.3963911525029102) internal successors, (5835), 1718 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5835 transitions. [2021-03-11 00:22:50,118 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5835 transitions. Word has length 27 [2021-03-11 00:22:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:50,119 INFO L480 AbstractCegarLoop]: Abstraction has 1719 states and 5835 transitions. [2021-03-11 00:22:50,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5835 transitions. [2021-03-11 00:22:50,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:50,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:50,121 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:50,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:50,331 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:50,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:50,331 INFO L82 PathProgramCache]: Analyzing trace with hash -523450416, now seen corresponding path program 12 times [2021-03-11 00:22:50,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:50,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737050553] [2021-03-11 00:22:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:50,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737050553] [2021-03-11 00:22:50,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335614360] [2021-03-11 00:22:50,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:22:50,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:22:50,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:50,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:22:50,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:50,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:50,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:22:50,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635129078] [2021-03-11 00:22:50,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:22:50,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:50,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:22:50,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:22:50,437 INFO L87 Difference]: Start difference. First operand 1719 states and 5835 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:50,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:50,598 INFO L93 Difference]: Finished difference Result 2232 states and 7209 transitions. [2021-03-11 00:22:50,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:22:50,598 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:50,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:50,601 INFO L225 Difference]: With dead ends: 2232 [2021-03-11 00:22:50,601 INFO L226 Difference]: Without dead ends: 2211 [2021-03-11 00:22:50,601 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:22:50,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-03-11 00:22:50,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1686. [2021-03-11 00:22:50,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.399406528189911) internal successors, (5728), 1685 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:50,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5728 transitions. [2021-03-11 00:22:50,625 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5728 transitions. Word has length 27 [2021-03-11 00:22:50,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:50,625 INFO L480 AbstractCegarLoop]: Abstraction has 1686 states and 5728 transitions. [2021-03-11 00:22:50,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5728 transitions. [2021-03-11 00:22:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:50,628 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:50,628 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:50,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-03-11 00:22:50,828 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:50,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:50,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1318431600, now seen corresponding path program 17 times [2021-03-11 00:22:50,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:50,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739352541] [2021-03-11 00:22:50,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:50,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739352541] [2021-03-11 00:22:50,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021021970] [2021-03-11 00:22:50,856 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 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 [2021-03-11 00:22:50,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:22:50,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:50,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:50,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:50,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:50,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:22:50,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806527216] [2021-03-11 00:22:50,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:50,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:50,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:50,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:50,952 INFO L87 Difference]: Start difference. First operand 1686 states and 5728 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-03-11 00:22:51,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:51,460 INFO L93 Difference]: Finished difference Result 3478 states and 10820 transitions. [2021-03-11 00:22:51,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:22:51,460 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 27 [2021-03-11 00:22:51,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:51,464 INFO L225 Difference]: With dead ends: 3478 [2021-03-11 00:22:51,464 INFO L226 Difference]: Without dead ends: 3478 [2021-03-11 00:22:51,465 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 332.5ms TimeCoverageRelationStatistics Valid=445, Invalid=1535, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:22:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-03-11 00:22:51,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 1866. [2021-03-11 00:22:51,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.4428954423592493) internal successors, (6421), 1865 states have internal predecessors, (6421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:51,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6421 transitions. [2021-03-11 00:22:51,495 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6421 transitions. Word has length 27 [2021-03-11 00:22:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:51,495 INFO L480 AbstractCegarLoop]: Abstraction has 1866 states and 6421 transitions. [2021-03-11 00:22:51,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-03-11 00:22:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6421 transitions. [2021-03-11 00:22:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:51,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:51,498 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:51,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:51,711 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:51,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:51,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2050893036, now seen corresponding path program 18 times [2021-03-11 00:22:51,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:51,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820317266] [2021-03-11 00:22:51,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:51,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820317266] [2021-03-11 00:22:51,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519140064] [2021-03-11 00:22:51,739 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 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 [2021-03-11 00:22:51,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:22:51,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:51,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:51,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:51,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:51,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:22:51,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273329351] [2021-03-11 00:22:51,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:51,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:51,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:51,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:51,830 INFO L87 Difference]: Start difference. First operand 1866 states and 6421 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-03-11 00:22:52,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:52,237 INFO L93 Difference]: Finished difference Result 3323 states and 10443 transitions. [2021-03-11 00:22:52,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-11 00:22:52,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 27 [2021-03-11 00:22:52,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:52,242 INFO L225 Difference]: With dead ends: 3323 [2021-03-11 00:22:52,242 INFO L226 Difference]: Without dead ends: 3319 [2021-03-11 00:22:52,242 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:22:52,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2021-03-11 00:22:52,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 1834. [2021-03-11 00:22:52,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 3.4451718494271684) internal successors, (6315), 1833 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 6315 transitions. [2021-03-11 00:22:52,269 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 6315 transitions. Word has length 27 [2021-03-11 00:22:52,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:52,269 INFO L480 AbstractCegarLoop]: Abstraction has 1834 states and 6315 transitions. [2021-03-11 00:22:52,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-03-11 00:22:52,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 6315 transitions. [2021-03-11 00:22:52,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:52,271 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:52,271 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:52,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-03-11 00:22:52,475 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:52,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:52,475 INFO L82 PathProgramCache]: Analyzing trace with hash -173194000, now seen corresponding path program 19 times [2021-03-11 00:22:52,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:52,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405587456] [2021-03-11 00:22:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:52,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405587456] [2021-03-11 00:22:52,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972335945] [2021-03-11 00:22:52,503 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:22:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:52,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:52,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:52,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:52,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:22:52,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786126800] [2021-03-11 00:22:52,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:52,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:52,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:52,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:52,616 INFO L87 Difference]: Start difference. First operand 1834 states and 6315 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:52,976 INFO L93 Difference]: Finished difference Result 3041 states and 9730 transitions. [2021-03-11 00:22:52,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:22:52,977 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:52,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:52,981 INFO L225 Difference]: With dead ends: 3041 [2021-03-11 00:22:52,981 INFO L226 Difference]: Without dead ends: 3029 [2021-03-11 00:22:52,981 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 223.6ms TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:52,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2021-03-11 00:22:53,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 1816. [2021-03-11 00:22:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.4512396694214877) internal successors, (6264), 1815 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:53,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 6264 transitions. [2021-03-11 00:22:53,007 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 6264 transitions. Word has length 27 [2021-03-11 00:22:53,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:53,007 INFO L480 AbstractCegarLoop]: Abstraction has 1816 states and 6264 transitions. [2021-03-11 00:22:53,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 6264 transitions. [2021-03-11 00:22:53,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:53,009 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:53,009 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:53,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:53,210 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:53,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:53,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2106791024, now seen corresponding path program 20 times [2021-03-11 00:22:53,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:53,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563605679] [2021-03-11 00:22:53,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:53,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563605679] [2021-03-11 00:22:53,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257796312] [2021-03-11 00:22:53,238 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:53,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:53,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:53,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:53,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:53,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:53,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-11 00:22:53,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842661084] [2021-03-11 00:22:53,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:53,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:53,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:53,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:53,340 INFO L87 Difference]: Start difference. First operand 1816 states and 6264 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:53,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:53,808 INFO L93 Difference]: Finished difference Result 4165 states and 13261 transitions. [2021-03-11 00:22:53,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-11 00:22:53,808 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:53,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:53,813 INFO L225 Difference]: With dead ends: 4165 [2021-03-11 00:22:53,813 INFO L226 Difference]: Without dead ends: 4165 [2021-03-11 00:22:53,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 296.7ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:22:53,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-03-11 00:22:53,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 2008. [2021-03-11 00:22:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.5366218236173395) internal successors, (7098), 2007 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7098 transitions. [2021-03-11 00:22:53,860 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7098 transitions. Word has length 27 [2021-03-11 00:22:53,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:53,860 INFO L480 AbstractCegarLoop]: Abstraction has 2008 states and 7098 transitions. [2021-03-11 00:22:53,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:53,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7098 transitions. [2021-03-11 00:22:53,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:53,863 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:53,863 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:54,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:54,064 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:54,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:54,064 INFO L82 PathProgramCache]: Analyzing trace with hash -729353744, now seen corresponding path program 21 times [2021-03-11 00:22:54,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:54,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128420300] [2021-03-11 00:22:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:54,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128420300] [2021-03-11 00:22:54,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458962592] [2021-03-11 00:22:54,095 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:54,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:22:54,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:54,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:54,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:54,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:54,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-11 00:22:54,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797862045] [2021-03-11 00:22:54,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:54,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:54,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:54,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:54,185 INFO L87 Difference]: Start difference. First operand 2008 states and 7098 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:54,671 INFO L93 Difference]: Finished difference Result 4184 states and 13322 transitions. [2021-03-11 00:22:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-11 00:22:54,671 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:54,676 INFO L225 Difference]: With dead ends: 4184 [2021-03-11 00:22:54,676 INFO L226 Difference]: Without dead ends: 4184 [2021-03-11 00:22:54,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:22:54,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4184 states. [2021-03-11 00:22:54,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4184 to 2009. [2021-03-11 00:22:54,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 3.5328685258964145) internal successors, (7094), 2008 states have internal predecessors, (7094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:54,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 7094 transitions. [2021-03-11 00:22:54,711 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 7094 transitions. Word has length 27 [2021-03-11 00:22:54,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:54,711 INFO L480 AbstractCegarLoop]: Abstraction has 2009 states and 7094 transitions. [2021-03-11 00:22:54,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:54,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 7094 transitions. [2021-03-11 00:22:54,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:54,713 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:54,713 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:54,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-03-11 00:22:54,914 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:54,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:54,914 INFO L82 PathProgramCache]: Analyzing trace with hash 21775592, now seen corresponding path program 22 times [2021-03-11 00:22:54,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:54,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981910660] [2021-03-11 00:22:54,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:54,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981910660] [2021-03-11 00:22:54,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369344900] [2021-03-11 00:22:54,941 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:54,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:54,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:54,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:54,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:55,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:55,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-03-11 00:22:55,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277318722] [2021-03-11 00:22:55,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:55,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:55,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:55,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:55,015 INFO L87 Difference]: Start difference. First operand 2009 states and 7094 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:55,400 INFO L93 Difference]: Finished difference Result 3911 states and 12446 transitions. [2021-03-11 00:22:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:22:55,400 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:55,405 INFO L225 Difference]: With dead ends: 3911 [2021-03-11 00:22:55,405 INFO L226 Difference]: Without dead ends: 3907 [2021-03-11 00:22:55,405 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:22:55,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-03-11 00:22:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 2031. [2021-03-11 00:22:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 3.531527093596059) internal successors, (7169), 2030 states have internal predecessors, (7169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 7169 transitions. [2021-03-11 00:22:55,437 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 7169 transitions. Word has length 27 [2021-03-11 00:22:55,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:55,437 INFO L480 AbstractCegarLoop]: Abstraction has 2031 states and 7169 transitions. [2021-03-11 00:22:55,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 7169 transitions. [2021-03-11 00:22:55,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:55,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:55,439 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:55,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-03-11 00:22:55,642 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:55,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:55,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1000333036, now seen corresponding path program 23 times [2021-03-11 00:22:55,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:55,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597674780] [2021-03-11 00:22:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:55,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597674780] [2021-03-11 00:22:55,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974598179] [2021-03-11 00:22:55,669 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:55,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:22:55,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:55,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:55,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:55,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:55,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-03-11 00:22:55,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662257645] [2021-03-11 00:22:55,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:55,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:55,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:55,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:55,749 INFO L87 Difference]: Start difference. First operand 2031 states and 7169 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:56,183 INFO L93 Difference]: Finished difference Result 4058 states and 12788 transitions. [2021-03-11 00:22:56,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:22:56,183 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:56,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:56,188 INFO L225 Difference]: With dead ends: 4058 [2021-03-11 00:22:56,188 INFO L226 Difference]: Without dead ends: 4058 [2021-03-11 00:22:56,188 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:22:56,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-03-11 00:22:56,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 2015. [2021-03-11 00:22:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.5307845084409135) internal successors, (7111), 2014 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:56,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 7111 transitions. [2021-03-11 00:22:56,221 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 7111 transitions. Word has length 27 [2021-03-11 00:22:56,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:56,221 INFO L480 AbstractCegarLoop]: Abstraction has 2015 states and 7111 transitions. [2021-03-11 00:22:56,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:56,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 7111 transitions. [2021-03-11 00:22:56,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:56,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:56,223 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:56,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:56,424 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:56,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:56,424 INFO L82 PathProgramCache]: Analyzing trace with hash 646145264, now seen corresponding path program 24 times [2021-03-11 00:22:56,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:56,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519993916] [2021-03-11 00:22:56,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:56,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519993916] [2021-03-11 00:22:56,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59389390] [2021-03-11 00:22:56,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:56,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:22:56,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:56,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:56,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:56,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:56,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:22:56,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027294284] [2021-03-11 00:22:56,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:56,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:56,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:56,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:56,523 INFO L87 Difference]: Start difference. First operand 2015 states and 7111 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:56,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:56,856 INFO L93 Difference]: Finished difference Result 3346 states and 10911 transitions. [2021-03-11 00:22:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:22:56,857 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:56,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:56,861 INFO L225 Difference]: With dead ends: 3346 [2021-03-11 00:22:56,861 INFO L226 Difference]: Without dead ends: 3334 [2021-03-11 00:22:56,861 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:22:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-03-11 00:22:56,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2049. [2021-03-11 00:22:56,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.5244140625) internal successors, (7218), 2048 states have internal predecessors, (7218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:56,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 7218 transitions. [2021-03-11 00:22:56,890 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 7218 transitions. Word has length 27 [2021-03-11 00:22:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:56,890 INFO L480 AbstractCegarLoop]: Abstraction has 2049 states and 7218 transitions. [2021-03-11 00:22:56,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 7218 transitions. [2021-03-11 00:22:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:56,892 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:56,892 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:57,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-03-11 00:22:57,093 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1567847404, now seen corresponding path program 25 times [2021-03-11 00:22:57,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:57,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734552390] [2021-03-11 00:22:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:57,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734552390] [2021-03-11 00:22:57,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125214069] [2021-03-11 00:22:57,120 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:57,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:57,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:57,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:57,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:22:57,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596269990] [2021-03-11 00:22:57,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:57,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:57,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:57,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:57,199 INFO L87 Difference]: Start difference. First operand 2049 states and 7218 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:57,602 INFO L93 Difference]: Finished difference Result 3635 states and 11672 transitions. [2021-03-11 00:22:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:22:57,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:57,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:57,607 INFO L225 Difference]: With dead ends: 3635 [2021-03-11 00:22:57,608 INFO L226 Difference]: Without dead ends: 3631 [2021-03-11 00:22:57,608 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:22:57,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2021-03-11 00:22:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 2132. [2021-03-11 00:22:57,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 3.5152510558423273) internal successors, (7491), 2131 states have internal predecessors, (7491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:57,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 7491 transitions. [2021-03-11 00:22:57,639 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 7491 transitions. Word has length 27 [2021-03-11 00:22:57,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:57,640 INFO L480 AbstractCegarLoop]: Abstraction has 2132 states and 7491 transitions. [2021-03-11 00:22:57,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:57,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 7491 transitions. [2021-03-11 00:22:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:22:57,642 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:57,642 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:57,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-03-11 00:22:57,842 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:57,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:57,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1748562448, now seen corresponding path program 26 times [2021-03-11 00:22:57,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:57,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567329997] [2021-03-11 00:22:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:57,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567329997] [2021-03-11 00:22:57,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138848466] [2021-03-11 00:22:57,870 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:57,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:57,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:57,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:57,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:57,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:57,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:22:57,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430535426] [2021-03-11 00:22:57,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:57,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:57,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:57,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:57,945 INFO L87 Difference]: Start difference. First operand 2132 states and 7491 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:58,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:58,414 INFO L93 Difference]: Finished difference Result 3810 states and 12119 transitions. [2021-03-11 00:22:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-11 00:22:58,415 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:22:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:58,419 INFO L225 Difference]: With dead ends: 3810 [2021-03-11 00:22:58,419 INFO L226 Difference]: Without dead ends: 3810 [2021-03-11 00:22:58,420 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 281.5ms TimeCoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:22:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-03-11 00:22:58,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 2086. [2021-03-11 00:22:58,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 3.51462829736211) internal successors, (7328), 2085 states have internal predecessors, (7328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:58,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 7328 transitions. [2021-03-11 00:22:58,452 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 7328 transitions. Word has length 27 [2021-03-11 00:22:58,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:58,452 INFO L480 AbstractCegarLoop]: Abstraction has 2086 states and 7328 transitions. [2021-03-11 00:22:58,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:58,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 7328 transitions. [2021-03-11 00:22:58,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:22:58,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:58,455 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:58,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-03-11 00:22:58,663 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:58,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:58,663 INFO L82 PathProgramCache]: Analyzing trace with hash -2115287982, now seen corresponding path program 29 times [2021-03-11 00:22:58,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:58,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790767872] [2021-03-11 00:22:58,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:59,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790767872] [2021-03-11 00:22:59,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886109538] [2021-03-11 00:22:59,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:59,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:22:59,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:59,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:22:59,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:59,748 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-11 00:22:59,960 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_17], 7=[v_prenex_19], 9=[A, v_prenex_14], 12=[v_prenex_21, v_prenex_15]} [2021-03-11 00:22:59,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:59,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:59,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:59,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2021-03-11 00:22:59,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:00,173 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-11 00:23:00,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:00,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,210 INFO L354 Elim1Store]: treesize reduction 26, result has 44.7 percent of original size [2021-03-11 00:23:00,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 30 [2021-03-11 00:23:00,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:00,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,261 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-03-11 00:23:00,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 42 [2021-03-11 00:23:00,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:00,573 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 108 [2021-03-11 00:23:00,574 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-03-11 00:23:00,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,599 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:23:00,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:23:00,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:00,744 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-11 00:23:00,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:00,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,770 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:23:00,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2021-03-11 00:23:00,788 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:00,928 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-11 00:23:00,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:00,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,970 INFO L354 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2021-03-11 00:23:00,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 31 [2021-03-11 00:23:00,973 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:00,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:00,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:01,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:01,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 69 [2021-03-11 00:23:01,028 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:01,276 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2021-03-11 00:23:01,276 INFO L628 ElimStorePlain]: treesize reduction 2, result has 99.3 percent of original size [2021-03-11 00:23:01,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:01,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:01,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:01,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:01,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:01,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:01,327 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-03-11 00:23:01,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 47 [2021-03-11 00:23:01,334 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:01,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:01,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:01,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:01,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:01,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:01,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:01,384 INFO L354 Elim1Store]: treesize reduction 14, result has 75.4 percent of original size [2021-03-11 00:23:01,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 55 [2021-03-11 00:23:01,400 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:01,508 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-11 00:23:01,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:01,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:23:01,512 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:433, output treesize:121 [2021-03-11 00:23:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:01,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:01,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-03-11 00:23:01,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133458289] [2021-03-11 00:23:01,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-11 00:23:01,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:01,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-11 00:23:01,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:23:01,642 INFO L87 Difference]: Start difference. First operand 2086 states and 7328 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-03-11 00:23:02,228 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-03-11 00:23:02,542 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-03-11 00:23:03,355 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-03-11 00:23:04,079 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2021-03-11 00:23:04,415 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 59 [2021-03-11 00:23:05,179 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 90 [2021-03-11 00:23:05,477 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 70 [2021-03-11 00:23:05,845 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-03-11 00:23:05,999 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-11 00:23:06,302 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-03-11 00:23:06,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:06,972 INFO L93 Difference]: Finished difference Result 2647 states and 8894 transitions. [2021-03-11 00:23:06,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-11 00:23:06,973 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 [2021-03-11 00:23:06,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:06,976 INFO L225 Difference]: With dead ends: 2647 [2021-03-11 00:23:06,976 INFO L226 Difference]: Without dead ends: 2617 [2021-03-11 00:23:06,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 5411.0ms TimeCoverageRelationStatistics Valid=950, Invalid=4162, Unknown=0, NotChecked=0, Total=5112 [2021-03-11 00:23:06,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2021-03-11 00:23:06,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 2119. [2021-03-11 00:23:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.514636449480642) internal successors, (7444), 2118 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7444 transitions. [2021-03-11 00:23:07,002 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7444 transitions. Word has length 29 [2021-03-11 00:23:07,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:07,002 INFO L480 AbstractCegarLoop]: Abstraction has 2119 states and 7444 transitions. [2021-03-11 00:23:07,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-03-11 00:23:07,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7444 transitions. [2021-03-11 00:23:07,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:23:07,005 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:07,005 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:07,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-03-11 00:23:07,220 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:07,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:07,220 INFO L82 PathProgramCache]: Analyzing trace with hash 663836106, now seen corresponding path program 30 times [2021-03-11 00:23:07,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:07,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893028832] [2021-03-11 00:23:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:07,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893028832] [2021-03-11 00:23:07,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292505621] [2021-03-11 00:23:07,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:07,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:23:07,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:07,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:23:07,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:08,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,442 INFO L354 Elim1Store]: treesize reduction 14, result has 82.7 percent of original size [2021-03-11 00:23:08,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 28 treesize of output 76 [2021-03-11 00:23:08,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:08,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,570 INFO L354 Elim1Store]: treesize reduction 14, result has 82.7 percent of original size [2021-03-11 00:23:08,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 28 treesize of output 76 [2021-03-11 00:23:08,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:08,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:08,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:08,629 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-03-11 00:23:08,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 22 [2021-03-11 00:23:08,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:08,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:08,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:08,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:08,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:08,652 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:23:08,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 10 [2021-03-11 00:23:08,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:08,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:08,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2021-03-11 00:23:08,671 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:08,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-11 00:23:08,675 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:08,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:08,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 37 treesize of output 127 [2021-03-11 00:23:08,902 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-03-11 00:23:08,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,935 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:23:08,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:23:08,936 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:08,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:08,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:08,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:08,971 INFO L354 Elim1Store]: treesize reduction 30, result has 43.4 percent of original size [2021-03-11 00:23:08,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 37 treesize of output 32 [2021-03-11 00:23:08,973 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:09,168 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2021-03-11 00:23:09,169 INFO L628 ElimStorePlain]: treesize reduction 356, result has 35.4 percent of original size [2021-03-11 00:23:09,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:23:09,172 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:505, output treesize:201 [2021-03-11 00:23:09,312 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-11 00:23:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:09,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:09,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-11 00:23:09,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234709360] [2021-03-11 00:23:09,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:23:09,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:09,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:23:09,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:23:09,465 INFO L87 Difference]: Start difference. First operand 2119 states and 7444 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:10,788 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 34 [2021-03-11 00:23:11,393 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2021-03-11 00:23:11,817 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 44 [2021-03-11 00:23:12,049 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-03-11 00:23:12,415 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 38 [2021-03-11 00:23:12,774 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-03-11 00:23:12,977 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-03-11 00:23:13,120 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-11 00:23:13,328 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2021-03-11 00:23:13,532 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-03-11 00:23:13,813 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-03-11 00:23:14,029 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:23:14,185 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-11 00:23:14,333 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-03-11 00:23:14,607 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-03-11 00:23:14,741 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-11 00:23:14,879 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-03-11 00:23:15,083 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-03-11 00:23:15,263 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-03-11 00:23:15,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:15,451 INFO L93 Difference]: Finished difference Result 3375 states and 11164 transitions. [2021-03-11 00:23:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-11 00:23:15,451 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-11 00:23:15,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:15,456 INFO L225 Difference]: With dead ends: 3375 [2021-03-11 00:23:15,456 INFO L226 Difference]: Without dead ends: 3330 [2021-03-11 00:23:15,456 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 5955.7ms TimeCoverageRelationStatistics Valid=1312, Invalid=5660, Unknown=0, NotChecked=0, Total=6972 [2021-03-11 00:23:15,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2021-03-11 00:23:15,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2135. [2021-03-11 00:23:15,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 3.5107778819119027) internal successors, (7492), 2134 states have internal predecessors, (7492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 7492 transitions. [2021-03-11 00:23:15,486 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 7492 transitions. Word has length 29 [2021-03-11 00:23:15,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:15,486 INFO L480 AbstractCegarLoop]: Abstraction has 2135 states and 7492 transitions. [2021-03-11 00:23:15,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:15,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 7492 transitions. [2021-03-11 00:23:15,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:23:15,488 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:15,488 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:15,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-03-11 00:23:15,689 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:15,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:15,689 INFO L82 PathProgramCache]: Analyzing trace with hash -390332982, now seen corresponding path program 31 times [2021-03-11 00:23:15,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:15,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983965703] [2021-03-11 00:23:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:16,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983965703] [2021-03-11 00:23:16,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999296091] [2021-03-11 00:23:16,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:16,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-11 00:23:16,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:16,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:16,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-03-11 00:23:16,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015994148] [2021-03-11 00:23:16,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-11 00:23:16,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:16,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-11 00:23:16,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:23:16,787 INFO L87 Difference]: Start difference. First operand 2135 states and 7492 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2021-03-11 00:23:17,364 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2021-03-11 00:23:18,058 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-03-11 00:23:18,425 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2021-03-11 00:23:18,626 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-03-11 00:23:18,777 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-03-11 00:23:19,058 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-03-11 00:23:19,219 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2021-03-11 00:23:19,405 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-03-11 00:23:19,681 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-11 00:23:19,931 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-03-11 00:23:20,200 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-03-11 00:23:20,439 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-03-11 00:23:20,716 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-03-11 00:23:21,085 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-11 00:23:21,289 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-03-11 00:23:21,576 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-11 00:23:21,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:21,678 INFO L93 Difference]: Finished difference Result 3159 states and 10589 transitions. [2021-03-11 00:23:21,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-11 00:23:21,679 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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 [2021-03-11 00:23:21,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:21,683 INFO L225 Difference]: With dead ends: 3159 [2021-03-11 00:23:21,683 INFO L226 Difference]: Without dead ends: 3144 [2021-03-11 00:23:21,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 4960.8ms TimeCoverageRelationStatistics Valid=925, Invalid=3905, Unknown=0, NotChecked=0, Total=4830 [2021-03-11 00:23:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2021-03-11 00:23:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 2139. [2021-03-11 00:23:21,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 3.510757717492984) internal successors, (7506), 2138 states have internal predecessors, (7506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 7506 transitions. [2021-03-11 00:23:21,712 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 7506 transitions. Word has length 29 [2021-03-11 00:23:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:21,712 INFO L480 AbstractCegarLoop]: Abstraction has 2139 states and 7506 transitions. [2021-03-11 00:23:21,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2021-03-11 00:23:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 7506 transitions. [2021-03-11 00:23:21,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:23:21,714 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:21,715 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:21,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:21,919 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:21,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:21,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1865872178, now seen corresponding path program 32 times [2021-03-11 00:23:21,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:21,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205467693] [2021-03-11 00:23:21,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:22,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205467693] [2021-03-11 00:23:22,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399908737] [2021-03-11 00:23:22,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:22,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:23:22,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:22,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-11 00:23:22,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:23,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:23,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-11 00:23:23,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304907997] [2021-03-11 00:23:23,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-11 00:23:23,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:23,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-11 00:23:23,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:23:23,062 INFO L87 Difference]: Start difference. First operand 2139 states and 7506 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2021-03-11 00:23:23,511 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-03-11 00:23:23,912 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-03-11 00:23:24,051 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2021-03-11 00:23:24,271 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 46 [2021-03-11 00:23:25,260 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2021-03-11 00:23:25,557 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-03-11 00:23:25,726 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2021-03-11 00:23:25,941 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-03-11 00:23:26,376 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-03-11 00:23:26,674 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2021-03-11 00:23:27,469 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-03-11 00:23:27,626 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-03-11 00:23:27,878 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-03-11 00:23:28,364 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-03-11 00:23:28,533 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-03-11 00:23:28,851 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-11 00:23:29,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:29,227 INFO L93 Difference]: Finished difference Result 3649 states and 12210 transitions. [2021-03-11 00:23:29,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-11 00:23:29,227 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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 [2021-03-11 00:23:29,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:29,232 INFO L225 Difference]: With dead ends: 3649 [2021-03-11 00:23:29,232 INFO L226 Difference]: Without dead ends: 3634 [2021-03-11 00:23:29,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2233 ImplicationChecksByTransitivity, 6127.4ms TimeCoverageRelationStatistics Valid=1277, Invalid=5863, Unknown=0, NotChecked=0, Total=7140 [2021-03-11 00:23:29,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2021-03-11 00:23:29,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 2143. [2021-03-11 00:23:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.510737628384687) internal successors, (7520), 2142 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:29,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7520 transitions. [2021-03-11 00:23:29,263 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7520 transitions. Word has length 29 [2021-03-11 00:23:29,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:29,263 INFO L480 AbstractCegarLoop]: Abstraction has 2143 states and 7520 transitions. [2021-03-11 00:23:29,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2021-03-11 00:23:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7520 transitions. [2021-03-11 00:23:29,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:23:29,266 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:29,266 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:29,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-03-11 00:23:29,467 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:29,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:29,467 INFO L82 PathProgramCache]: Analyzing trace with hash -47808706, now seen corresponding path program 33 times [2021-03-11 00:23:29,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:29,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908057422] [2021-03-11 00:23:29,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:30,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908057422] [2021-03-11 00:23:30,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836834692] [2021-03-11 00:23:30,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:30,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:23:30,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:30,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:23:30,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:30,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:30,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 47 [2021-03-11 00:23:30,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:30,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,726 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:23:30,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:23:30,727 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:30,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:30,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 37 treesize of output 127 [2021-03-11 00:23:30,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-11 00:23:30,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,994 INFO L354 Elim1Store]: treesize reduction 32, result has 39.6 percent of original size [2021-03-11 00:23:30,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 30 [2021-03-11 00:23:30,996 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:31,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,029 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-03-11 00:23:31,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 22 [2021-03-11 00:23:31,031 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:31,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,161 INFO L354 Elim1Store]: treesize reduction 16, result has 86.1 percent of original size [2021-03-11 00:23:31,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 37 treesize of output 111 [2021-03-11 00:23:31,232 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:31,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:31,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:31,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:31,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:31,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 3 [2021-03-11 00:23:31,242 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:31,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-11 00:23:31,247 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:31,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:31,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:31,277 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-03-11 00:23:31,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 22 [2021-03-11 00:23:31,279 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:31,496 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 41 [2021-03-11 00:23:31,497 INFO L628 ElimStorePlain]: treesize reduction 856, result has 18.6 percent of original size [2021-03-11 00:23:31,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:23:31,500 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:511, output treesize:201 [2021-03-11 00:23:31,646 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-11 00:23:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:31,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:31,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-03-11 00:23:31,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305990792] [2021-03-11 00:23:31,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-11 00:23:31,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:31,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-11 00:23:31,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:23:31,743 INFO L87 Difference]: Start difference. First operand 2143 states and 7520 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) [2021-03-11 00:23:32,148 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-03-11 00:23:32,295 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-03-11 00:23:32,996 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-11 00:23:33,320 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-03-11 00:23:33,937 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-11 00:23:34,082 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-11 00:23:34,215 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-03-11 00:23:34,366 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-03-11 00:23:34,593 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-03-11 00:23:35,103 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-03-11 00:23:35,546 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-03-11 00:23:36,109 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2021-03-11 00:23:36,749 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-11 00:23:36,937 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-03-11 00:23:37,228 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-11 00:23:37,391 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-03-11 00:23:37,571 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-03-11 00:23:37,772 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-03-11 00:23:37,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:37,993 INFO L93 Difference]: Finished difference Result 2991 states and 9866 transitions. [2021-03-11 00:23:37,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-11 00:23:37,994 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 [2021-03-11 00:23:37,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:37,998 INFO L225 Difference]: With dead ends: 2991 [2021-03-11 00:23:37,998 INFO L226 Difference]: Without dead ends: 2961 [2021-03-11 00:23:37,998 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 6321.5ms TimeCoverageRelationStatistics Valid=1189, Invalid=5131, Unknown=0, NotChecked=0, Total=6320 [2021-03-11 00:23:38,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-03-11 00:23:38,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2166. [2021-03-11 00:23:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2165 states have (on average 3.5163972286374134) internal successors, (7613), 2165 states have internal predecessors, (7613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 7613 transitions. [2021-03-11 00:23:38,028 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 7613 transitions. Word has length 29 [2021-03-11 00:23:38,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:38,028 INFO L480 AbstractCegarLoop]: Abstraction has 2166 states and 7613 transitions. [2021-03-11 00:23:38,028 INFO L481 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) [2021-03-11 00:23:38,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 7613 transitions. [2021-03-11 00:23:38,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:23:38,031 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:38,031 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:38,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:38,231 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:38,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:38,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1738821818, now seen corresponding path program 34 times [2021-03-11 00:23:38,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:38,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371737182] [2021-03-11 00:23:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:38,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371737182] [2021-03-11 00:23:38,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451306626] [2021-03-11 00:23:38,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:38,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:23:38,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:38,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-11 00:23:38,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:39,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,166 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-03-11 00:23:39,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 42 [2021-03-11 00:23:39,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:39,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:39,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:39,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-03-11 00:23:39,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:39,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,224 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:23:39,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:23:39,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:39,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:39,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:39,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:39,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:39,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2021-03-11 00:23:39,239 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:39,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-11 00:23:39,243 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:39,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,303 INFO L354 Elim1Store]: treesize reduction 22, result has 60.0 percent of original size [2021-03-11 00:23:39,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 45 [2021-03-11 00:23:39,311 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:39,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:39,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-03-11 00:23:39,376 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-03-11 00:23:39,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:39,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:39,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:39,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:39,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:39,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-03-11 00:23:39,384 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:39,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-11 00:23:39,387 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:39,438 INFO L628 ElimStorePlain]: treesize reduction 48, result has 42.2 percent of original size [2021-03-11 00:23:39,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:23:39,439 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:334, output treesize:35 [2021-03-11 00:23:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:39,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:39,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-03-11 00:23:39,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806756833] [2021-03-11 00:23:39,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-11 00:23:39,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:39,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-11 00:23:39,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:23:39,523 INFO L87 Difference]: Start difference. First operand 2166 states and 7613 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2021-03-11 00:23:39,917 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-03-11 00:23:40,168 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-11 00:23:40,473 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-03-11 00:23:40,605 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2021-03-11 00:23:41,103 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-03-11 00:23:41,260 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-03-11 00:23:41,522 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 41 [2021-03-11 00:23:42,428 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-03-11 00:23:42,645 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-03-11 00:23:43,247 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-03-11 00:23:43,417 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:23:43,572 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-03-11 00:23:44,146 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-03-11 00:23:44,487 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-11 00:23:44,784 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-11 00:23:45,157 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-03-11 00:23:45,330 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-11 00:23:45,604 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-03-11 00:23:45,870 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-03-11 00:23:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:46,159 INFO L93 Difference]: Finished difference Result 3804 states and 12493 transitions. [2021-03-11 00:23:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-03-11 00:23:46,159 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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 [2021-03-11 00:23:46,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:46,166 INFO L225 Difference]: With dead ends: 3804 [2021-03-11 00:23:46,166 INFO L226 Difference]: Without dead ends: 3770 [2021-03-11 00:23:46,166 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 6398.7ms TimeCoverageRelationStatistics Valid=1465, Invalid=5845, Unknown=0, NotChecked=0, Total=7310 [2021-03-11 00:23:46,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2021-03-11 00:23:46,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 2174. [2021-03-11 00:23:46,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2173 states have (on average 3.5227795674183158) internal successors, (7655), 2173 states have internal predecessors, (7655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 7655 transitions. [2021-03-11 00:23:46,200 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 7655 transitions. Word has length 29 [2021-03-11 00:23:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:46,200 INFO L480 AbstractCegarLoop]: Abstraction has 2174 states and 7655 transitions. [2021-03-11 00:23:46,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2021-03-11 00:23:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 7655 transitions. [2021-03-11 00:23:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:23:46,203 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:46,203 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:46,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-03-11 00:23:46,404 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:46,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:46,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1705222590, now seen corresponding path program 35 times [2021-03-11 00:23:46,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:46,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601285120] [2021-03-11 00:23:46,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:46,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601285120] [2021-03-11 00:23:46,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701990637] [2021-03-11 00:23:46,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:47,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:23:47,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:47,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-11 00:23:47,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:47,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:47,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 29 [2021-03-11 00:23:47,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657516606] [2021-03-11 00:23:47,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-11 00:23:47,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:47,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-11 00:23:47,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:23:47,609 INFO L87 Difference]: Start difference. First operand 2174 states and 7655 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:48,123 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-11 00:23:48,702 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-03-11 00:23:48,889 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2021-03-11 00:23:49,215 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-03-11 00:23:49,560 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-03-11 00:23:49,807 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 36 [2021-03-11 00:23:49,948 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-03-11 00:23:50,687 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-03-11 00:23:50,997 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-03-11 00:23:51,343 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-03-11 00:23:51,667 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-03-11 00:23:52,043 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-03-11 00:23:52,182 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-03-11 00:23:52,621 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-03-11 00:23:52,764 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-03-11 00:23:52,948 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-03-11 00:23:53,123 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-03-11 00:23:53,514 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-03-11 00:23:53,685 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-03-11 00:23:54,022 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-03-11 00:23:54,277 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-03-11 00:23:54,447 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-11 00:23:54,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:54,702 INFO L93 Difference]: Finished difference Result 3564 states and 11816 transitions. [2021-03-11 00:23:54,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-03-11 00:23:54,703 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-11 00:23:54,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:54,708 INFO L225 Difference]: With dead ends: 3564 [2021-03-11 00:23:54,708 INFO L226 Difference]: Without dead ends: 3534 [2021-03-11 00:23:54,709 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2939 ImplicationChecksByTransitivity, 6904.9ms TimeCoverageRelationStatistics Valid=1369, Invalid=7561, Unknown=0, NotChecked=0, Total=8930 [2021-03-11 00:23:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3534 states. [2021-03-11 00:23:54,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3534 to 2182. [2021-03-11 00:23:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 3.525905547913801) internal successors, (7690), 2181 states have internal predecessors, (7690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:54,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 7690 transitions. [2021-03-11 00:23:54,752 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 7690 transitions. Word has length 29 [2021-03-11 00:23:54,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:54,752 INFO L480 AbstractCegarLoop]: Abstraction has 2182 states and 7690 transitions. [2021-03-11 00:23:54,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:54,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 7690 transitions. [2021-03-11 00:23:54,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:23:54,755 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:54,755 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:54,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-03-11 00:23:54,955 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:54,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:54,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1876233986, now seen corresponding path program 36 times [2021-03-11 00:23:54,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:54,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35119356] [2021-03-11 00:23:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:55,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35119356] [2021-03-11 00:23:55,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617506917] [2021-03-11 00:23:55,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:55,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:23:55,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:55,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-11 00:23:55,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:55,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:55,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:55,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:55,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:55,966 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-03-11 00:23:55,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 42 [2021-03-11 00:23:55,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:55,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:55,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:55,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:55,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:55,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:55,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:55,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-03-11 00:23:55,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:55,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:55,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:55,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:55,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:55,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:55,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,021 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:23:56,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:23:56,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:56,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:56,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:56,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:56,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:56,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2021-03-11 00:23:56,036 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:56,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-11 00:23:56,039 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:56,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,095 INFO L354 Elim1Store]: treesize reduction 22, result has 60.0 percent of original size [2021-03-11 00:23:56,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 45 [2021-03-11 00:23:56,106 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:56,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:56,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-03-11 00:23:56,185 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-03-11 00:23:56,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:56,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:56,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:56,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:56,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-03-11 00:23:56,194 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:56,196 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-11 00:23:56,197 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:56,262 INFO L628 ElimStorePlain]: treesize reduction 48, result has 42.2 percent of original size [2021-03-11 00:23:56,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:23:56,263 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:334, output treesize:35 [2021-03-11 00:23:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:56,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:56,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-03-11 00:23:56,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982891844] [2021-03-11 00:23:56,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-11 00:23:56,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:56,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-11 00:23:56,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:23:56,371 INFO L87 Difference]: Start difference. First operand 2182 states and 7690 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2021-03-11 00:23:56,837 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-11 00:23:56,995 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-03-11 00:23:57,295 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-11 00:23:57,828 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-03-11 00:23:58,546 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-03-11 00:23:59,087 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-03-11 00:23:59,401 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-03-11 00:23:59,949 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-11 00:24:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:00,269 INFO L93 Difference]: Finished difference Result 3027 states and 10081 transitions. [2021-03-11 00:24:00,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-11 00:24:00,270 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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 [2021-03-11 00:24:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:00,275 INFO L225 Difference]: With dead ends: 3027 [2021-03-11 00:24:00,275 INFO L226 Difference]: Without dead ends: 3005 [2021-03-11 00:24:00,275 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 3923.0ms TimeCoverageRelationStatistics Valid=770, Invalid=2890, Unknown=0, NotChecked=0, Total=3660 [2021-03-11 00:24:00,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2021-03-11 00:24:00,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 2194. [2021-03-11 00:24:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 3.528499772001824) internal successors, (7738), 2193 states have internal predecessors, (7738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 7738 transitions. [2021-03-11 00:24:00,307 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 7738 transitions. Word has length 29 [2021-03-11 00:24:00,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:00,307 INFO L480 AbstractCegarLoop]: Abstraction has 2194 states and 7738 transitions. [2021-03-11 00:24:00,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2021-03-11 00:24:00,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 7738 transitions. [2021-03-11 00:24:00,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:24:00,310 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:00,310 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:00,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-03-11 00:24:00,511 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:00,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:00,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1414759434, now seen corresponding path program 37 times [2021-03-11 00:24:00,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:00,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161961856] [2021-03-11 00:24:00,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:01,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161961856] [2021-03-11 00:24:01,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012738129] [2021-03-11 00:24:01,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:01,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-11 00:24:01,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:01,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:01,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-03-11 00:24:01,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351557476] [2021-03-11 00:24:01,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-11 00:24:01,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:01,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-11 00:24:01,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:24:01,663 INFO L87 Difference]: Start difference. First operand 2194 states and 7738 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:02,724 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-03-11 00:24:03,223 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2021-03-11 00:24:03,603 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-03-11 00:24:03,741 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-03-11 00:24:04,460 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-11 00:24:04,860 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-03-11 00:24:05,189 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-03-11 00:24:05,507 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-03-11 00:24:05,937 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-03-11 00:24:06,154 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-03-11 00:24:06,433 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-03-11 00:24:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:06,770 INFO L93 Difference]: Finished difference Result 3152 states and 10618 transitions. [2021-03-11 00:24:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-11 00:24:06,770 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-11 00:24:06,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:06,774 INFO L225 Difference]: With dead ends: 3152 [2021-03-11 00:24:06,775 INFO L226 Difference]: Without dead ends: 3137 [2021-03-11 00:24:06,775 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 4815.9ms TimeCoverageRelationStatistics Valid=879, Invalid=4523, Unknown=0, NotChecked=0, Total=5402 [2021-03-11 00:24:06,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2021-03-11 00:24:06,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 2213. [2021-03-11 00:24:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2212 states have (on average 3.523508137432188) internal successors, (7794), 2212 states have internal predecessors, (7794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 7794 transitions. [2021-03-11 00:24:06,802 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 7794 transitions. Word has length 29 [2021-03-11 00:24:06,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:06,802 INFO L480 AbstractCegarLoop]: Abstraction has 2213 states and 7794 transitions. [2021-03-11 00:24:06,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:06,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 7794 transitions. [2021-03-11 00:24:06,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:24:06,804 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:06,804 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:07,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:07,005 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:07,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:07,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2040643966, now seen corresponding path program 38 times [2021-03-11 00:24:07,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:07,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755662374] [2021-03-11 00:24:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:07,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755662374] [2021-03-11 00:24:07,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433706231] [2021-03-11 00:24:07,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:07,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:24:07,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:07,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-11 00:24:07,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:08,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,234 INFO L354 Elim1Store]: treesize reduction 26, result has 44.7 percent of original size [2021-03-11 00:24:08,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 30 [2021-03-11 00:24:08,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:08,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,309 INFO L354 Elim1Store]: treesize reduction 12, result has 78.9 percent of original size [2021-03-11 00:24:08,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 57 [2021-03-11 00:24:08,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:08,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,364 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:24:08,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2021-03-11 00:24:08,366 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:08,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:08,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:08,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-03-11 00:24:08,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:08,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:08,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 69 [2021-03-11 00:24:08,455 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-03-11 00:24:08,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,502 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-03-11 00:24:08,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 23 [2021-03-11 00:24:08,504 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:08,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-11 00:24:08,508 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:08,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:08,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:08,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:08,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:08,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:08,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:08,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:08,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 10 [2021-03-11 00:24:08,521 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:08,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-11 00:24:08,524 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:08,590 INFO L628 ElimStorePlain]: treesize reduction 92, result has 35.2 percent of original size [2021-03-11 00:24:08,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:24:08,592 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:388, output treesize:34 [2021-03-11 00:24:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:08,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:08,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-03-11 00:24:08,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210559850] [2021-03-11 00:24:08,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-11 00:24:08,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:08,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-11 00:24:08,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:24:08,686 INFO L87 Difference]: Start difference. First operand 2213 states and 7794 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:09,404 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-03-11 00:24:09,787 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2021-03-11 00:24:10,131 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-11 00:24:10,375 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-03-11 00:24:10,579 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2021-03-11 00:24:10,724 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-03-11 00:24:11,017 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-11 00:24:11,616 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2021-03-11 00:24:12,098 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-03-11 00:24:12,488 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-03-11 00:24:12,782 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-03-11 00:24:13,195 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-03-11 00:24:13,576 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-03-11 00:24:14,024 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-11 00:24:14,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:14,228 INFO L93 Difference]: Finished difference Result 3817 states and 12863 transitions. [2021-03-11 00:24:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-11 00:24:14,229 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-11 00:24:14,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:14,235 INFO L225 Difference]: With dead ends: 3817 [2021-03-11 00:24:14,235 INFO L226 Difference]: Without dead ends: 3780 [2021-03-11 00:24:14,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1875 ImplicationChecksByTransitivity, 5524.9ms TimeCoverageRelationStatistics Valid=1099, Invalid=4907, Unknown=0, NotChecked=0, Total=6006 [2021-03-11 00:24:14,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-03-11 00:24:14,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 2226. [2021-03-11 00:24:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 3.526292134831461) internal successors, (7846), 2225 states have internal predecessors, (7846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 7846 transitions. [2021-03-11 00:24:14,282 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 7846 transitions. Word has length 29 [2021-03-11 00:24:14,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:14,282 INFO L480 AbstractCegarLoop]: Abstraction has 2226 states and 7846 transitions. [2021-03-11 00:24:14,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 7846 transitions. [2021-03-11 00:24:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:24:14,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:14,285 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:14,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-03-11 00:24:14,485 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:14,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1387426286, now seen corresponding path program 39 times [2021-03-11 00:24:14,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:14,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992841368] [2021-03-11 00:24:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:15,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992841368] [2021-03-11 00:24:15,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984691879] [2021-03-11 00:24:15,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:15,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:24:15,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:15,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-11 00:24:15,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:43,763 WARN L205 SmtUtils]: Spent 28.28 s on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-11 00:24:44,048 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_42], 7=[v_prenex_44], 9=[A], 12=[v_prenex_40, v_prenex_38]} [2021-03-11 00:24:44,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:44,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2021-03-11 00:24:44,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:44,263 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-11 00:24:44,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:44,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,313 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-03-11 00:24:44,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 32 [2021-03-11 00:24:44,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:44,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,367 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-03-11 00:24:44,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 44 [2021-03-11 00:24:44,379 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:44,658 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-03-11 00:24:44,658 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-03-11 00:24:44,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,689 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:24:44,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:24:44,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:44,825 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:24:44,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:44,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:44,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 69 [2021-03-11 00:24:44,900 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:44,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:44,942 INFO L354 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2021-03-11 00:24:44,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:24:44,944 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:45,175 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-03-11 00:24:45,176 INFO L628 ElimStorePlain]: treesize reduction 2, result has 99.1 percent of original size [2021-03-11 00:24:45,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:45,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:45,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:45,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:45,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:45,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:45,238 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-03-11 00:24:45,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 47 [2021-03-11 00:24:45,247 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:45,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:45,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:45,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:45,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:45,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:45,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:45,303 INFO L354 Elim1Store]: treesize reduction 14, result has 75.4 percent of original size [2021-03-11 00:24:45,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 55 [2021-03-11 00:24:45,320 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:45,434 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-11 00:24:45,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:45,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:24:45,437 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 10 variables, input treesize:345, output treesize:116 [2021-03-11 00:24:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:45,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:45,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-03-11 00:24:45,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014831276] [2021-03-11 00:24:45,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-11 00:24:45,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:45,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-11 00:24:45,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:24:45,562 INFO L87 Difference]: Start difference. First operand 2226 states and 7846 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:46,476 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-03-11 00:24:46,671 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-03-11 00:24:47,271 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-03-11 00:24:48,233 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-11 00:24:48,471 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-03-11 00:25:02,774 WARN L205 SmtUtils]: Spent 14.13 s on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:25:03,118 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-03-11 00:25:03,492 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-03-11 00:25:03,811 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-03-11 00:25:03,960 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-03-11 00:25:04,228 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-03-11 00:25:04,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:04,662 INFO L93 Difference]: Finished difference Result 3719 states and 12619 transitions. [2021-03-11 00:25:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:25:04,663 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-11 00:25:04,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:04,669 INFO L225 Difference]: With dead ends: 3719 [2021-03-11 00:25:04,669 INFO L226 Difference]: Without dead ends: 3692 [2021-03-11 00:25:04,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 47334.4ms TimeCoverageRelationStatistics Valid=942, Invalid=4170, Unknown=0, NotChecked=0, Total=5112 [2021-03-11 00:25:04,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3692 states. [2021-03-11 00:25:04,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3692 to 2234. [2021-03-11 00:25:04,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 3.5244066278549036) internal successors, (7870), 2233 states have internal predecessors, (7870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 7870 transitions. [2021-03-11 00:25:04,700 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 7870 transitions. Word has length 29 [2021-03-11 00:25:04,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:04,701 INFO L480 AbstractCegarLoop]: Abstraction has 2234 states and 7870 transitions. [2021-03-11 00:25:04,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:04,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 7870 transitions. [2021-03-11 00:25:04,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:25:04,703 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:04,703 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:04,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable699,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:04,918 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:04,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:04,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1589944394, now seen corresponding path program 40 times [2021-03-11 00:25:04,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:04,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132690587] [2021-03-11 00:25:04,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:05,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132690587] [2021-03-11 00:25:05,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177941506] [2021-03-11 00:25:05,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:05,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:25:05,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:05,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-11 00:25:05,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:06,074 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-11 00:25:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:06,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:06,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-11 00:25:06,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120483999] [2021-03-11 00:25:06,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-11 00:25:06,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:06,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-11 00:25:06,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:25:06,184 INFO L87 Difference]: Start difference. First operand 2234 states and 7870 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2021-03-11 00:25:07,085 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2021-03-11 00:25:07,360 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2021-03-11 00:25:07,716 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-03-11 00:25:08,953 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-03-11 00:25:09,092 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-03-11 00:25:09,406 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-03-11 00:25:09,763 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-03-11 00:25:09,985 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-03-11 00:25:10,920 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-03-11 00:25:11,250 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:25:11,459 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-03-11 00:25:11,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:11,795 INFO L93 Difference]: Finished difference Result 3714 states and 12523 transitions. [2021-03-11 00:25:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-11 00:25:11,796 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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 [2021-03-11 00:25:11,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:11,803 INFO L225 Difference]: With dead ends: 3714 [2021-03-11 00:25:11,803 INFO L226 Difference]: Without dead ends: 3699 [2021-03-11 00:25:11,804 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 5350.2ms TimeCoverageRelationStatistics Valid=1020, Invalid=4680, Unknown=0, NotChecked=0, Total=5700 [2021-03-11 00:25:11,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2021-03-11 00:25:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 2234. [2021-03-11 00:25:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 3.5244066278549036) internal successors, (7870), 2233 states have internal predecessors, (7870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:11,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 7870 transitions. [2021-03-11 00:25:11,838 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 7870 transitions. Word has length 29 [2021-03-11 00:25:11,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:11,838 INFO L480 AbstractCegarLoop]: Abstraction has 2234 states and 7870 transitions. [2021-03-11 00:25:11,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2021-03-11 00:25:11,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 7870 transitions. [2021-03-11 00:25:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:25:11,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:11,841 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:12,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-03-11 00:25:12,041 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:12,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:12,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1619613102, now seen corresponding path program 13 times [2021-03-11 00:25:12,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:12,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243403778] [2021-03-11 00:25:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:12,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243403778] [2021-03-11 00:25:12,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409459711] [2021-03-11 00:25:12,654 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:12,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-11 00:25:12,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:13,583 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-03-11 00:25:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:13,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:13,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-03-11 00:25:13,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104982220] [2021-03-11 00:25:13,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-11 00:25:13,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:13,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-11 00:25:13,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:25:13,861 INFO L87 Difference]: Start difference. First operand 2234 states and 7870 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) 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) [2021-03-11 00:25:24,708 WARN L205 SmtUtils]: Spent 10.21 s on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-03-11 00:25:28,244 WARN L205 SmtUtils]: Spent 3.11 s on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2021-03-11 00:25:30,705 WARN L205 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-03-11 00:25:36,965 WARN L205 SmtUtils]: Spent 6.20 s on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-03-11 00:25:37,135 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2021-03-11 00:25:39,956 WARN L205 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-03-11 00:25:46,299 WARN L205 SmtUtils]: Spent 6.23 s on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-03-11 00:25:46,734 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-03-11 00:25:46,921 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-11 00:25:47,134 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-03-11 00:25:47,601 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-03-11 00:25:47,796 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-03-11 00:25:48,204 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2021-03-11 00:25:48,611 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 73 [2021-03-11 00:25:48,823 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-11 00:25:49,010 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-11 00:25:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:49,051 INFO L93 Difference]: Finished difference Result 3634 states and 12031 transitions. [2021-03-11 00:25:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-11 00:25:49,052 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) 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 29 [2021-03-11 00:25:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:49,058 INFO L225 Difference]: With dead ends: 3634 [2021-03-11 00:25:49,059 INFO L226 Difference]: Without dead ends: 3619 [2021-03-11 00:25:49,059 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 35330.3ms TimeCoverageRelationStatistics Valid=782, Invalid=3250, Unknown=0, NotChecked=0, Total=4032 [2021-03-11 00:25:49,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-03-11 00:25:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 2244. [2021-03-11 00:25:49,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2243 states have (on average 3.521622826571556) internal successors, (7899), 2243 states have internal predecessors, (7899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:49,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 7899 transitions. [2021-03-11 00:25:49,093 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 7899 transitions. Word has length 29 [2021-03-11 00:25:49,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:49,093 INFO L480 AbstractCegarLoop]: Abstraction has 2244 states and 7899 transitions. [2021-03-11 00:25:49,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) 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) [2021-03-11 00:25:49,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 7899 transitions. [2021-03-11 00:25:49,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:25:49,096 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:49,096 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:49,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable771 [2021-03-11 00:25:49,296 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:49,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:49,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1969180942, now seen corresponding path program 14 times [2021-03-11 00:25:49,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:49,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472199641] [2021-03-11 00:25:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:49,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472199641] [2021-03-11 00:25:49,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189581815] [2021-03-11 00:25:49,852 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:49,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:25:49,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:49,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-11 00:25:49,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:11,083 WARN L205 SmtUtils]: Spent 20.38 s on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2021-03-11 00:26:11,295 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_62], 14=[A, v_prenex_60, v_prenex_65, v_prenex_63]} [2021-03-11 00:26:11,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:26:11,344 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-03-11 00:26:11,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 17 treesize of output 31 [2021-03-11 00:26:11,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:26:11,525 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-11 00:26:11,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:26:11,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:26:11,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:26:11,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:26:11,671 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-11 00:26:11,671 INFO L354 Elim1Store]: treesize reduction 30, result has 70.9 percent of original size [2021-03-11 00:26:11,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 26 treesize of output 82 [2021-03-11 00:26:11,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:26:12,060 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 98 [2021-03-11 00:26:12,061 INFO L628 ElimStorePlain]: treesize reduction 56, result has 82.2 percent of original size [2021-03-11 00:26:12,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:26:12,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:26:12,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:26:12,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:26:12,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 26 treesize of output 112 [2021-03-11 00:26:12,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:26:12,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:26:12,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:26:12,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:26:12,526 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-11 00:26:12,527 INFO L354 Elim1Store]: treesize reduction 26, result has 74.8 percent of original size [2021-03-11 00:26:12,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 26 treesize of output 86 [2021-03-11 00:26:12,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:26:12,895 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-03-11 00:26:12,896 INFO L628 ElimStorePlain]: treesize reduction 18, result has 92.3 percent of original size [2021-03-11 00:26:12,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:26:12,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:26:12,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:26:13,039 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-11 00:26:13,040 INFO L354 Elim1Store]: treesize reduction 28, result has 72.8 percent of original size [2021-03-11 00:26:13,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 26 treesize of output 84 [2021-03-11 00:26:13,100 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:26:13,386 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-03-11 00:26:13,386 INFO L628 ElimStorePlain]: treesize reduction 53, result has 78.9 percent of original size [2021-03-11 00:26:13,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:26:13,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:26:13,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:26:13,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:26:13,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 26 treesize of output 112 [2021-03-11 00:26:13,615 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 3 xjuncts. [2021-03-11 00:26:13,958 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 75 [2021-03-11 00:26:13,959 INFO L628 ElimStorePlain]: treesize reduction 309, result has 35.9 percent of original size [2021-03-11 00:26:13,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 5 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:26:13,969 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 14 variables, input treesize:287, output treesize:114 [2021-03-11 00:26:14,188 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-11 00:26:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:14,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:14,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-03-11 00:26:14,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686134594] [2021-03-11 00:26:14,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-11 00:26:14,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:14,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-11 00:26:14,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:26:14,236 INFO L87 Difference]: Start difference. First operand 2244 states and 7899 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:14,912 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2021-03-11 00:26:15,266 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 29 [2021-03-11 00:26:17,713 WARN L205 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-03-11 00:26:17,974 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-11 00:26:18,175 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 39 [2021-03-11 00:26:18,365 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-11 00:26:18,514 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-11 00:26:20,928 WARN L205 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 96 DAG size of output: 71 [2021-03-11 00:26:27,654 WARN L205 SmtUtils]: Spent 6.66 s on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-03-11 00:26:32,157 WARN L205 SmtUtils]: Spent 4.42 s on a formula simplification. DAG size of input: 101 DAG size of output: 60 [2021-03-11 00:26:32,569 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 28 [2021-03-11 00:26:35,050 WARN L205 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 100 DAG size of output: 74 [2021-03-11 00:26:37,559 WARN L205 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 118 DAG size of output: 72 [2021-03-11 00:26:42,223 WARN L205 SmtUtils]: Spent 4.44 s on a formula simplification. DAG size of input: 118 DAG size of output: 75 [2021-03-11 00:26:42,768 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-03-11 00:26:43,115 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2021-03-11 00:26:43,314 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-03-11 00:26:43,894 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-03-11 00:26:44,500 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-03-11 00:26:44,932 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-03-11 00:26:45,285 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-03-11 00:27:15,988 WARN L205 SmtUtils]: Spent 30.63 s on a formula simplification. DAG size of input: 97 DAG size of output: 90 [2021-03-11 00:27:16,508 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-11 00:27:17,186 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-11 00:27:17,496 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-03-11 00:27:17,970 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-03-11 00:27:18,203 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-11 00:27:18,583 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-03-11 00:27:18,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:18,710 INFO L93 Difference]: Finished difference Result 4034 states and 13369 transitions. [2021-03-11 00:27:18,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:27:18,712 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-11 00:27:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:18,720 INFO L225 Difference]: With dead ends: 4034 [2021-03-11 00:27:18,720 INFO L226 Difference]: Without dead ends: 4004 [2021-03-11 00:27:18,720 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 83987.1ms TimeCoverageRelationStatistics Valid=807, Invalid=3099, Unknown=0, NotChecked=0, Total=3906 [2021-03-11 00:27:18,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4004 states. [2021-03-11 00:27:18,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4004 to 2260. [2021-03-11 00:27:18,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2259 states have (on average 3.522355024347056) internal successors, (7957), 2259 states have internal predecessors, (7957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 7957 transitions. [2021-03-11 00:27:18,768 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 7957 transitions. Word has length 29 [2021-03-11 00:27:18,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:18,768 INFO L480 AbstractCegarLoop]: Abstraction has 2260 states and 7957 transitions. [2021-03-11 00:27:18,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 7957 transitions. [2021-03-11 00:27:18,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:27:18,771 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:18,771 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:18,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable781 [2021-03-11 00:27:18,971 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:18,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:18,972 INFO L82 PathProgramCache]: Analyzing trace with hash -580502318, now seen corresponding path program 15 times [2021-03-11 00:27:18,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:18,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344647094] [2021-03-11 00:27:18,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:19,658 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-11 00:27:19,805 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-11 00:27:19,929 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-11 00:27:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:20,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344647094] [2021-03-11 00:27:20,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426573394] [2021-03-11 00:27:20,044 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:20,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:27:20,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:20,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:27:20,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:21,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:21,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:21,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:21,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:21,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:21,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:21,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:21,856 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-11 00:27:21,857 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-03-11 00:27:21,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 28 treesize of output 76 [2021-03-11 00:27:21,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:21,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:21,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:21,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:21,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:21,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:21,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-03-11 00:27:21,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:21,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-11 00:27:21,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:21,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:21,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:21,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:21,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:27:22,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:27:22,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:27:22,065 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-03-11 00:27:22,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 13 [2021-03-11 00:27:22,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:22,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:27:22,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:27:22,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:27:22,333 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-11 00:27:22,334 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-03-11 00:27:22,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 76 [2021-03-11 00:27:22,385 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:22,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:22,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-03-11 00:27:22,438 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:22,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:27:22,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:27:22,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:27:22,528 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-03-11 00:27:22,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 13 [2021-03-11 00:27:22,531 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:22,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:27:22,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:27:22,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:27:22,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:22,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 88 [2021-03-11 00:27:22,796 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-03-11 00:27:22,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:22,993 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-03-11 00:27:22,994 INFO L354 Elim1Store]: treesize reduction 30, result has 62.0 percent of original size [2021-03-11 00:27:22,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 28 treesize of output 58 [2021-03-11 00:27:23,023 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:23,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:23,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:23,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:23,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:23,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:23,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:23,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:23,214 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-11 00:27:23,215 INFO L354 Elim1Store]: treesize reduction 14, result has 82.3 percent of original size [2021-03-11 00:27:23,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 28 treesize of output 74 [2021-03-11 00:27:23,306 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:23,744 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2021-03-11 00:27:23,745 INFO L628 ElimStorePlain]: treesize reduction 275, result has 39.0 percent of original size [2021-03-11 00:27:23,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:27:23,749 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:604, output treesize:216 [2021-03-11 00:27:24,174 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-11 00:27:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:24,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:24,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2021-03-11 00:27:24,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392920772] [2021-03-11 00:27:24,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-11 00:27:24,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:24,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-11 00:27:24,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:27:24,347 INFO L87 Difference]: Start difference. First operand 2260 states and 7957 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) 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) [2021-03-11 00:27:24,773 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-03-11 00:27:25,020 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-11 00:27:25,395 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-03-11 00:27:25,850 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-03-11 00:27:26,055 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-11 00:27:26,512 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-11 00:27:26,735 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-11 00:27:27,102 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-03-11 00:27:27,333 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:27:27,686 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-11 00:27:27,834 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-03-11 00:27:28,152 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-11 00:27:28,441 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-03-11 00:27:28,876 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-03-11 00:27:29,361 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-03-11 00:27:29,718 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-03-11 00:27:30,225 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-03-11 00:27:30,456 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:27:30,860 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-03-11 00:27:31,276 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-11 00:27:31,636 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-11 00:27:32,111 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-03-11 00:27:32,352 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-11 00:27:32,658 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-11 00:27:33,095 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-11 00:27:33,510 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-11 00:27:33,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:33,857 INFO L93 Difference]: Finished difference Result 3408 states and 11347 transitions. [2021-03-11 00:27:33,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:27:33,860 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) 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 29 [2021-03-11 00:27:33,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:33,866 INFO L225 Difference]: With dead ends: 3408 [2021-03-11 00:27:33,867 INFO L226 Difference]: Without dead ends: 3343 [2021-03-11 00:27:33,867 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 9600.4ms TimeCoverageRelationStatistics Valid=410, Invalid=2782, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:27:33,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2021-03-11 00:27:33,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 2288. [2021-03-11 00:27:33,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2287 states have (on average 3.515959772627897) internal successors, (8041), 2287 states have internal predecessors, (8041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 8041 transitions. [2021-03-11 00:27:33,903 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 8041 transitions. Word has length 29 [2021-03-11 00:27:33,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:33,904 INFO L480 AbstractCegarLoop]: Abstraction has 2288 states and 8041 transitions. [2021-03-11 00:27:33,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) 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) [2021-03-11 00:27:33,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 8041 transitions. [2021-03-11 00:27:33,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:27:33,907 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:33,907 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:34,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1004 [2021-03-11 00:27:34,119 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:34,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:34,119 INFO L82 PathProgramCache]: Analyzing trace with hash -517413926, now seen corresponding path program 16 times [2021-03-11 00:27:34,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:34,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030983067] [2021-03-11 00:27:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:34,553 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-11 00:27:34,816 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-11 00:27:34,950 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-11 00:27:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:35,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030983067] [2021-03-11 00:27:35,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734051390] [2021-03-11 00:27:35,176 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:35,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:27:35,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:35,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-11 00:27:35,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:36,093 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:27:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:36,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:36,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-11 00:27:36,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204112848] [2021-03-11 00:27:36,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:27:36,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:36,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:27:36,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:27:36,313 INFO L87 Difference]: Start difference. First operand 2288 states and 8041 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:36,664 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-03-11 00:27:37,097 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-11 00:27:37,284 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-03-11 00:27:37,887 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-03-11 00:27:38,208 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-11 00:27:39,033 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2021-03-11 00:27:39,258 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2021-03-11 00:27:39,593 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-11 00:27:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:39,670 INFO L93 Difference]: Finished difference Result 3178 states and 10668 transitions. [2021-03-11 00:27:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:27:39,672 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-11 00:27:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:39,677 INFO L225 Difference]: With dead ends: 3178 [2021-03-11 00:27:39,677 INFO L226 Difference]: Without dead ends: 3163 [2021-03-11 00:27:39,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 4063.9ms TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:27:39,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-03-11 00:27:39,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 2284. [2021-03-11 00:27:39,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 3.516863775733684) internal successors, (8029), 2283 states have internal predecessors, (8029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 8029 transitions. [2021-03-11 00:27:39,707 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 8029 transitions. Word has length 29 [2021-03-11 00:27:39,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:39,707 INFO L480 AbstractCegarLoop]: Abstraction has 2284 states and 8029 transitions. [2021-03-11 00:27:39,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 8029 transitions. [2021-03-11 00:27:39,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:27:39,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:39,710 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:39,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1167 [2021-03-11 00:27:39,911 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:39,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:39,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1600210838, now seen corresponding path program 17 times [2021-03-11 00:27:39,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:39,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943389235] [2021-03-11 00:27:39,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:40,636 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-11 00:27:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:40,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943389235] [2021-03-11 00:27:40,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095302036] [2021-03-11 00:27:40,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:40,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:27:40,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:40,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:27:40,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:41,826 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-11 00:27:42,123 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-11 00:27:42,399 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-11 00:27:42,622 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_75], 7=[v_prenex_74, v_prenex_73]} [2021-03-11 00:27:42,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:42,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:42,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:42,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:42,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:42,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-03-11 00:27:42,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:42,905 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-11 00:27:42,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:42,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:42,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:42,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:42,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:42,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:42,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-03-11 00:27:42,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:43,179 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-11 00:27:43,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:43,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:43,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:43,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:43,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:43,258 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:27:43,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-03-11 00:27:43,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:43,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:43,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:43,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:43,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:43,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:43,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-03-11 00:27:43,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:43,760 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-03-11 00:27:43,761 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.4 percent of original size [2021-03-11 00:27:43,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:43,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:43,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:43,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:43,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:43,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-03-11 00:27:43,848 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:43,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:43,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:43,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:43,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:27:43,907 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-03-11 00:27:43,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-03-11 00:27:43,910 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:44,272 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-03-11 00:27:44,273 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-03-11 00:27:44,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:27:44,280 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:254, output treesize:81 [2021-03-11 00:27:44,627 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-11 00:27:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:44,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:44,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-03-11 00:27:44,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790469014] [2021-03-11 00:27:44,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:27:44,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:44,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:27:44,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:27:44,669 INFO L87 Difference]: Start difference. First operand 2284 states and 8029 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-03-11 00:27:45,266 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-03-11 00:27:45,436 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-11 00:27:54,126 WARN L205 SmtUtils]: Spent 8.23 s on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-11 00:27:54,338 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-03-11 00:27:54,510 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-11 00:27:54,682 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-11 00:28:21,297 WARN L205 SmtUtils]: Spent 26.44 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-03-11 00:28:29,775 WARN L205 SmtUtils]: Spent 8.38 s on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-03-11 00:29:01,029 WARN L205 SmtUtils]: Spent 30.78 s on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-03-11 00:29:01,585 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:29:01,791 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-03-11 00:29:01,966 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-11 00:29:02,783 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-03-11 00:29:03,475 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-03-11 00:29:04,312 WARN L205 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-03-11 00:29:05,140 WARN L205 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-03-11 00:29:05,683 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:29:05,884 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-11 00:29:06,557 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-03-11 00:29:06,762 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:29:07,445 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-03-11 00:29:08,077 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-03-11 00:29:08,384 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-11 00:29:09,135 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2021-03-11 00:29:09,566 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-11 00:29:09,876 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-03-11 00:29:10,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:10,120 INFO L93 Difference]: Finished difference Result 3169 states and 10709 transitions. [2021-03-11 00:29:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-11 00:29:10,122 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 29 [2021-03-11 00:29:10,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:10,127 INFO L225 Difference]: With dead ends: 3169 [2021-03-11 00:29:10,127 INFO L226 Difference]: Without dead ends: 3115 [2021-03-11 00:29:10,127 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 85209.1ms TimeCoverageRelationStatistics Valid=458, Invalid=2734, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:29:10,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2021-03-11 00:29:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 2306. [2021-03-11 00:29:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 3.515401301518438) internal successors, (8103), 2305 states have internal predecessors, (8103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:10,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 8103 transitions. [2021-03-11 00:29:10,158 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 8103 transitions. Word has length 29 [2021-03-11 00:29:10,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:10,158 INFO L480 AbstractCegarLoop]: Abstraction has 2306 states and 8103 transitions. [2021-03-11 00:29:10,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-03-11 00:29:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 8103 transitions. [2021-03-11 00:29:10,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:29:10,161 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:10,161 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:29:10,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:10,361 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:10,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:10,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2024544714, now seen corresponding path program 18 times [2021-03-11 00:29:10,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:10,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885587779] [2021-03-11 00:29:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:10,632 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-03-11 00:29:10,784 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-11 00:29:10,954 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-11 00:29:11,106 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:29:11,253 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-11 00:29:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:11,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885587779] [2021-03-11 00:29:11,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723515383] [2021-03-11 00:29:11,647 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:11,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:29:11,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:11,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-11 00:29:11,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:12,682 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:29:12,991 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:29:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:13,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:13,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-11 00:29:13,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46978563] [2021-03-11 00:29:13,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:29:13,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:13,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:29:13,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:29:13,300 INFO L87 Difference]: Start difference. First operand 2306 states and 8103 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:13,669 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-03-11 00:29:15,153 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-03-11 00:29:15,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:15,463 INFO L93 Difference]: Finished difference Result 2856 states and 9793 transitions. [2021-03-11 00:29:15,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:29:15,466 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-11 00:29:15,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:15,471 INFO L225 Difference]: With dead ends: 2856 [2021-03-11 00:29:15,471 INFO L226 Difference]: Without dead ends: 2841 [2021-03-11 00:29:15,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 3719.2ms TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:29:15,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-03-11 00:29:15,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2296. [2021-03-11 00:29:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 3.5180827886710238) internal successors, (8074), 2295 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:15,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 8074 transitions. [2021-03-11 00:29:15,499 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 8074 transitions. Word has length 29 [2021-03-11 00:29:15,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:15,500 INFO L480 AbstractCegarLoop]: Abstraction has 2296 states and 8074 transitions. [2021-03-11 00:29:15,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 8074 transitions. [2021-03-11 00:29:15,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:29:15,502 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:15,502 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:29:15,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1204,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:15,703 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:15,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1418429486, now seen corresponding path program 19 times [2021-03-11 00:29:15,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:15,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293098260] [2021-03-11 00:29:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:15,967 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-03-11 00:29:16,120 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-11 00:29:16,279 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-11 00:29:16,481 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-11 00:29:16,670 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-11 00:29:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:17,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293098260] [2021-03-11 00:29:17,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601629661] [2021-03-11 00:29:17,061 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:17,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-11 00:29:17,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:24,125 WARN L205 SmtUtils]: Spent 6.20 s on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:29:28,431 WARN L205 SmtUtils]: Spent 4.19 s on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:29:28,812 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_83, v_prenex_85], 7=[A, v_prenex_82, v_prenex_86, v_prenex_84]} [2021-03-11 00:29:28,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:28,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:28,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:28,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:28,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-03-11 00:29:28,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:29,183 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-11 00:29:29,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:29,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:29,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:29,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:29,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:29,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:29,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-03-11 00:29:29,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:29,518 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-11 00:29:29,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:29,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:29,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:29,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:29,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:29,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:29,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-03-11 00:29:29,616 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:29,886 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-11 00:29:29,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:29,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:29,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:29,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:29,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:29,985 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:29:29,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-03-11 00:29:29,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:30,274 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-11 00:29:30,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:30,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:30,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:30,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:30,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:30,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:30,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-03-11 00:29:30,391 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:30,673 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:29:30,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:30,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:30,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:30,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:30,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:30,787 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:29:30,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-03-11 00:29:30,793 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:31,079 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:29:31,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:31,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:29:31,084 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:224, output treesize:76 [2021-03-11 00:29:31,418 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-11 00:29:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:31,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:31,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-03-11 00:29:31,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546932403] [2021-03-11 00:29:31,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:29:31,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:31,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:29:31,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:29:31,529 INFO L87 Difference]: Start difference. First operand 2296 states and 8074 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-03-11 00:29:31,906 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-03-11 00:29:32,091 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-03-11 00:29:32,481 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-03-11 00:29:32,729 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-11 00:29:33,027 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-03-11 00:29:33,196 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-11 00:29:33,377 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-03-11 00:29:37,156 WARN L205 SmtUtils]: Spent 3.53 s on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2021-03-11 00:29:46,319 WARN L205 SmtUtils]: Spent 8.64 s on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-03-11 00:29:46,694 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 28 [2021-03-11 00:29:46,916 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-11 00:29:57,872 WARN L205 SmtUtils]: Spent 8.66 s on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-03-11 00:30:06,707 WARN L205 SmtUtils]: Spent 8.73 s on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-03-11 00:30:28,516 WARN L205 SmtUtils]: Spent 19.43 s on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-03-11 00:30:41,828 WARN L205 SmtUtils]: Spent 13.17 s on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-03-11 00:30:46,589 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-11 00:30:49,309 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-11 00:30:50,160 WARN L205 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-03-11 00:30:51,040 WARN L205 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-03-11 00:30:51,668 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-11 00:30:52,330 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-11 00:30:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:52,511 INFO L93 Difference]: Finished difference Result 3213 states and 11009 transitions. [2021-03-11 00:30:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:30:52,516 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 29 [2021-03-11 00:30:52,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:52,522 INFO L225 Difference]: With dead ends: 3213 [2021-03-11 00:30:52,522 INFO L226 Difference]: Without dead ends: 3198 [2021-03-11 00:30:52,522 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 80439.1ms TimeCoverageRelationStatistics Valid=329, Invalid=1651, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:30:52,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-03-11 00:30:52,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 2313. [2021-03-11 00:30:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 3.5216262975778547) internal successors, (8142), 2312 states have internal predecessors, (8142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 8142 transitions. [2021-03-11 00:30:52,554 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 8142 transitions. Word has length 29 [2021-03-11 00:30:52,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:52,554 INFO L480 AbstractCegarLoop]: Abstraction has 2313 states and 8142 transitions. [2021-03-11 00:30:52,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-03-11 00:30:52,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 8142 transitions. [2021-03-11 00:30:52,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:30:52,557 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:52,558 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:30:52,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1211,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:52,758 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:52,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:52,758 INFO L82 PathProgramCache]: Analyzing trace with hash 2103821890, now seen corresponding path program 41 times [2021-03-11 00:30:52,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:52,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801609457] [2021-03-11 00:30:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:53,015 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-03-11 00:30:53,237 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-11 00:30:53,494 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-11 00:30:53,767 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-11 00:30:54,043 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-11 00:30:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:54,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801609457] [2021-03-11 00:30:54,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044370072] [2021-03-11 00:30:54,673 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:54,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:30:54,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:54,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-11 00:30:54,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:55,499 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:30:55,716 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:30:56,027 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:30:56,405 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:30:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:57,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:57,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-11 00:30:57,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134636707] [2021-03-11 00:30:57,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-11 00:30:57,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:57,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-11 00:30:57,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:30:57,248 INFO L87 Difference]: Start difference. First operand 2313 states and 8142 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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) [2021-03-11 00:30:57,756 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2021-03-11 00:30:57,937 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2021-03-11 00:30:58,219 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-03-11 00:30:58,694 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-03-11 00:30:58,988 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:30:59,415 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-03-11 00:30:59,719 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-11 00:31:00,271 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2021-03-11 00:31:00,701 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-03-11 00:31:01,159 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:31:01,686 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2021-03-11 00:31:02,171 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-11 00:31:02,390 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-03-11 00:31:02,797 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-11 00:31:03,333 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-03-11 00:31:03,541 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:31:04,105 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-03-11 00:31:04,595 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-11 00:31:05,008 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-11 00:31:05,272 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:31:06,390 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-11 00:31:06,745 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:31:07,335 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:31:07,806 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-11 00:31:08,595 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-11 00:31:08,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:08,950 INFO L93 Difference]: Finished difference Result 3606 states and 12159 transitions. [2021-03-11 00:31:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-11 00:31:08,954 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 [2021-03-11 00:31:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:08,961 INFO L225 Difference]: With dead ends: 3606 [2021-03-11 00:31:08,961 INFO L226 Difference]: Without dead ends: 3562 [2021-03-11 00:31:08,962 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 11779.4ms TimeCoverageRelationStatistics Valid=531, Invalid=2549, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:31:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3562 states. [2021-03-11 00:31:08,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3562 to 2467. [2021-03-11 00:31:08,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 2466 states have (on average 3.5158150851581507) internal successors, (8670), 2466 states have internal predecessors, (8670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:08,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 8670 transitions. [2021-03-11 00:31:08,995 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 8670 transitions. Word has length 29 [2021-03-11 00:31:08,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:08,995 INFO L480 AbstractCegarLoop]: Abstraction has 2467 states and 8670 transitions. [2021-03-11 00:31:08,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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) [2021-03-11 00:31:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 8670 transitions. [2021-03-11 00:31:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:31:08,998 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:08,998 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:31:09,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1232 [2021-03-11 00:31:09,198 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:09,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:09,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1477937358, now seen corresponding path program 42 times [2021-03-11 00:31:09,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:09,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365345773] [2021-03-11 00:31:09,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:09,417 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2021-03-11 00:31:09,598 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-03-11 00:31:09,782 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-03-11 00:31:09,987 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-03-11 00:31:10,292 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-11 00:31:10,508 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2021-03-11 00:31:10,727 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2021-03-11 00:31:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:11,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365345773] [2021-03-11 00:31:11,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977620306] [2021-03-11 00:31:11,093 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:11,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:31:11,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:11,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-11 00:31:11,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:11,868 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-03-11 00:31:12,144 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:31:12,442 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:31:12,828 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:31:13,643 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-11 00:31:14,232 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_94], 27=[A], 44=[v_prenex_96]} [2021-03-11 00:31:14,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:14,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-03-11 00:31:14,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:14,802 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-11 00:31:14,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:14,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:14,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:14,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:14,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:14,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:14,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:14,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:14,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:14,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:14,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:14,990 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:31:14,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:31:14,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:15,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:15,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:15,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:15,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:15,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:15,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:15,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:15,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:15,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:15,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 38 [2021-03-11 00:31:15,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-11 00:31:16,116 WARN L205 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-03-11 00:31:16,118 INFO L628 ElimStorePlain]: treesize reduction 11, result has 95.1 percent of original size [2021-03-11 00:31:16,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:16,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:16,234 INFO L244 Elim1Store]: Index analysis took 105 ms [2021-03-11 00:31:16,326 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:31:16,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:31:16,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:16,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:16,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2021-03-11 00:31:16,438 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:16,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:16,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:16,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:16,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 38 [2021-03-11 00:31:16,647 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:17,063 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:31:17,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:17,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:31:17,075 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 11 variables, input treesize:269, output treesize:51 [2021-03-11 00:31:17,483 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-03-11 00:31:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:17,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:17,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-03-11 00:31:17,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293089993] [2021-03-11 00:31:17,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-11 00:31:17,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:17,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-11 00:31:17,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:31:17,735 INFO L87 Difference]: Start difference. First operand 2467 states and 8670 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-03-11 00:31:18,141 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-11 00:31:18,364 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-11 00:31:18,788 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-11 00:31:19,254 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-11 00:31:19,673 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:31:20,016 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-11 00:31:20,317 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 17 [2021-03-11 00:31:20,944 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2021-03-11 00:31:21,493 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-11 00:31:22,075 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-11 00:31:22,997 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-11 00:31:23,418 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:31:23,875 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-11 00:31:24,575 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:31:25,214 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-11 00:31:25,833 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-11 00:31:26,378 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-11 00:31:26,668 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:31:27,362 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-03-11 00:31:28,038 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-11 00:31:29,068 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-03-11 00:31:29,750 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-11 00:31:30,184 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-11 00:31:31,297 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-11 00:31:31,921 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-11 00:31:32,484 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-11 00:31:33,387 WARN L205 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-11 00:31:34,125 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-11 00:31:34,536 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:31:35,355 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-11 00:31:36,148 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-11 00:31:36,744 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:31:38,015 WARN L205 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-11 00:31:40,073 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-03-11 00:31:41,057 WARN L205 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-03-11 00:31:42,661 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-11 00:31:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:43,050 INFO L93 Difference]: Finished difference Result 4348 states and 14490 transitions. [2021-03-11 00:31:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-11 00:31:43,055 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 [2021-03-11 00:31:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:43,065 INFO L225 Difference]: With dead ends: 4348 [2021-03-11 00:31:43,065 INFO L226 Difference]: Without dead ends: 4295 [2021-03-11 00:31:43,065 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 23370.7ms TimeCoverageRelationStatistics Valid=790, Invalid=3370, Unknown=0, NotChecked=0, Total=4160 [2021-03-11 00:31:43,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4295 states. [2021-03-11 00:31:43,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4295 to 2578. [2021-03-11 00:31:43,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2577 states have (on average 3.514163756305782) internal successors, (9056), 2577 states have internal predecessors, (9056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:43,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 9056 transitions. [2021-03-11 00:31:43,109 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 9056 transitions. Word has length 29 [2021-03-11 00:31:43,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:43,110 INFO L480 AbstractCegarLoop]: Abstraction has 2578 states and 9056 transitions. [2021-03-11 00:31:43,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-03-11 00:31:43,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 9056 transitions. [2021-03-11 00:31:43,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:31:43,113 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:43,113 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:31:43,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1288 [2021-03-11 00:31:43,314 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:43,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:43,314 INFO L82 PathProgramCache]: Analyzing trace with hash 2131155038, now seen corresponding path program 43 times [2021-03-11 00:31:43,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:43,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335667828] [2021-03-11 00:31:43,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:43,651 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-03-11 00:31:43,926 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-11 00:31:44,217 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-11 00:31:44,514 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-11 00:31:44,755 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-11 00:31:45,070 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-11 00:31:45,367 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-11 00:31:45,521 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-03-11 00:31:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:45,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335667828] [2021-03-11 00:31:45,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250965312] [2021-03-11 00:31:45,805 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:45,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-11 00:31:45,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:46,773 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:31:47,096 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:31:47,794 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-11 00:31:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:48,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:48,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-11 00:31:48,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577543687] [2021-03-11 00:31:48,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:31:48,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:48,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:31:48,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:31:48,430 INFO L87 Difference]: Start difference. First operand 2578 states and 9056 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:48,949 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-11 00:31:49,874 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-11 00:31:50,536 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-11 00:31:51,131 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-11 00:31:51,873 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-11 00:31:52,698 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-03-11 00:31:53,244 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:31:53,938 WARN L205 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-03-11 00:31:54,738 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-11 00:31:55,426 WARN L205 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-03-11 00:31:55,930 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-11 00:31:56,216 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:31:56,560 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:31:57,393 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:31:57,717 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:31:58,346 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-11 00:31:58,805 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:31:59,273 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:32:00,175 WARN L205 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-03-11 00:32:01,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:01,168 INFO L93 Difference]: Finished difference Result 3929 states and 13287 transitions. [2021-03-11 00:32:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:32:01,173 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-11 00:32:01,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:01,181 INFO L225 Difference]: With dead ends: 3929 [2021-03-11 00:32:01,181 INFO L226 Difference]: Without dead ends: 3867 [2021-03-11 00:32:01,181 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 13257.5ms TimeCoverageRelationStatistics Valid=401, Invalid=1669, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:32:01,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2021-03-11 00:32:01,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 2626. [2021-03-11 00:32:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 2625 states have (on average 3.5142857142857142) internal successors, (9225), 2625 states have internal predecessors, (9225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 9225 transitions. [2021-03-11 00:32:01,220 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 9225 transitions. Word has length 29 [2021-03-11 00:32:01,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:01,220 INFO L480 AbstractCegarLoop]: Abstraction has 2626 states and 9225 transitions. [2021-03-11 00:32:01,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:01,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 9225 transitions. [2021-03-11 00:32:01,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:32:01,224 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:01,224 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:01,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1314,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:01,425 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:01,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1316037810, now seen corresponding path program 20 times [2021-03-11 00:32:01,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:01,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796354] [2021-03-11 00:32:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:02,435 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-11 00:32:02,970 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-11 00:32:03,444 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-11 00:32:03,983 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-11 00:32:04,150 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:32:04,307 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-11 00:32:04,503 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:32:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:04,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796354] [2021-03-11 00:32:04,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427832364] [2021-03-11 00:32:04,810 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:04,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:32:04,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:04,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-11 00:32:04,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:05,887 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:32:06,285 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:32:06,570 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:32:07,352 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-11 00:32:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:07,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:07,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2021-03-11 00:32:07,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891533713] [2021-03-11 00:32:07,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-11 00:32:07,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:07,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-11 00:32:07,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:32:07,578 INFO L87 Difference]: Start difference. First operand 2626 states and 9225 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) 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) [2021-03-11 00:32:08,127 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-11 00:32:08,430 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-11 00:32:09,416 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-11 00:32:10,254 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2021-03-11 00:32:10,548 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2021-03-11 00:32:10,869 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-11 00:32:11,954 WARN L205 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-03-11 00:32:13,298 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-03-11 00:32:14,472 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2021-03-11 00:32:15,239 WARN L205 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2021-03-11 00:32:16,516 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-03-11 00:32:17,489 WARN L205 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-03-11 00:32:18,103 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-03-11 00:32:18,395 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:32:19,169 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-11 00:32:20,332 WARN L205 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2021-03-11 00:32:21,059 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-11 00:32:21,289 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:32:22,735 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-03-11 00:32:23,754 WARN L205 SmtUtils]: Spent 949.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-03-11 00:32:24,651 WARN L205 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-03-11 00:32:25,157 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2021-03-11 00:32:26,231 WARN L205 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-11 00:32:27,582 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-03-11 00:32:28,422 WARN L205 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-03-11 00:32:29,091 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:32:29,501 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:32:30,226 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2021-03-11 00:32:30,503 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:32:30,682 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:32:31,059 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-03-11 00:32:32,823 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2021-03-11 00:32:33,476 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 38 [2021-03-11 00:32:34,622 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-03-11 00:32:35,590 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-03-11 00:32:36,418 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-03-11 00:32:36,843 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-11 00:32:37,338 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-11 00:32:37,701 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-11 00:32:38,103 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-11 00:32:38,940 WARN L205 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-03-11 00:32:39,781 WARN L205 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-03-11 00:32:40,786 WARN L205 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2021-03-11 00:32:41,521 WARN L205 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2021-03-11 00:32:42,775 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-03-11 00:32:43,785 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2021-03-11 00:32:44,985 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-03-11 00:32:46,398 WARN L205 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-03-11 00:32:47,128 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-11 00:32:47,435 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:32:48,434 WARN L205 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-03-11 00:32:49,368 WARN L205 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-03-11 00:32:50,088 WARN L205 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-03-11 00:32:51,174 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-03-11 00:32:52,081 WARN L205 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-11 00:32:52,749 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-03-11 00:32:53,313 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-11 00:32:54,090 WARN L205 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-03-11 00:32:54,930 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-03-11 00:32:56,130 WARN L205 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-03-11 00:32:57,153 WARN L205 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-03-11 00:32:57,734 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-03-11 00:32:57,883 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-03-11 00:32:58,280 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-03-11 00:33:00,613 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2021-03-11 00:33:01,821 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 104 DAG size of output: 70 [2021-03-11 00:33:02,680 WARN L205 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2021-03-11 00:33:03,561 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-11 00:33:04,874 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-03-11 00:33:06,424 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-03-11 00:33:08,114 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-03-11 00:33:10,164 WARN L205 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-03-11 00:33:11,374 WARN L205 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2021-03-11 00:33:12,121 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2021-03-11 00:33:13,628 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-11 00:33:14,725 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-03-11 00:33:15,533 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2021-03-11 00:33:16,178 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-03-11 00:33:16,731 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-03-11 00:33:17,138 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2021-03-11 00:33:17,329 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:33:17,487 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-11 00:33:17,680 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:33:20,493 WARN L205 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 107 DAG size of output: 84 [2021-03-11 00:33:22,789 WARN L205 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2021-03-11 00:33:23,557 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-11 00:33:24,626 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:33:25,478 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2021-03-11 00:33:25,767 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:33:26,798 WARN L205 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-11 00:33:27,845 WARN L205 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-03-11 00:33:28,602 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-03-11 00:33:30,055 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-03-11 00:33:31,068 WARN L205 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-03-11 00:33:31,958 WARN L205 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-11 00:33:33,100 WARN L205 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-03-11 00:33:34,240 WARN L205 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-03-11 00:33:35,502 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-11 00:33:36,482 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-11 00:33:37,499 WARN L205 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2021-03-11 00:33:39,128 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2021-03-11 00:33:40,750 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-03-11 00:33:41,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:41,645 INFO L93 Difference]: Finished difference Result 6000 states and 19541 transitions. [2021-03-11 00:33:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-03-11 00:33:41,652 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) 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 29 [2021-03-11 00:33:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:41,664 INFO L225 Difference]: With dead ends: 6000 [2021-03-11 00:33:41,664 INFO L226 Difference]: Without dead ends: 5985 [2021-03-11 00:33:41,664 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6734 ImplicationChecksByTransitivity, 87614.8ms TimeCoverageRelationStatistics Valid=1891, Invalid=14879, Unknown=0, NotChecked=0, Total=16770 [2021-03-11 00:33:41,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5985 states. [2021-03-11 00:33:41,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5985 to 2674. [2021-03-11 00:33:41,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2674 states, 2673 states have (on average 3.5095398428731763) internal successors, (9381), 2673 states have internal predecessors, (9381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:41,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 9381 transitions. [2021-03-11 00:33:41,716 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 9381 transitions. Word has length 29 [2021-03-11 00:33:41,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:41,716 INFO L480 AbstractCegarLoop]: Abstraction has 2674 states and 9381 transitions. [2021-03-11 00:33:41,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) 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) [2021-03-11 00:33:41,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 9381 transitions. [2021-03-11 00:33:41,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:33:41,720 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:41,720 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:33:41,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1323 [2021-03-11 00:33:41,921 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:41,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1804724658, now seen corresponding path program 21 times [2021-03-11 00:33:41,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:41,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445567429] [2021-03-11 00:33:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:42,924 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-11 00:33:43,458 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-11 00:33:43,914 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-11 00:33:44,393 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-11 00:33:44,913 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-11 00:33:45,124 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:33:45,328 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:33:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:45,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445567429] [2021-03-11 00:33:45,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180990618] [2021-03-11 00:33:45,654 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:45,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:33:45,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:45,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:33:45,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:46,540 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-11 00:33:46,829 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:33:47,380 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:33:48,222 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-11 00:33:58,057 WARN L205 SmtUtils]: Spent 9.07 s on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2021-03-11 00:34:07,059 WARN L205 SmtUtils]: Spent 8.50 s on a formula simplification. DAG size of input: 80 DAG size of output: 32 [2021-03-11 00:34:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:07,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:07,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2021-03-11 00:34:07,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446733797] [2021-03-11 00:34:07,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-11 00:34:07,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:07,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-11 00:34:07,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:34:07,405 INFO L87 Difference]: Start difference. First operand 2674 states and 9381 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) 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) [2021-03-11 00:34:08,760 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-11 00:34:09,405 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-11 00:34:09,981 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-03-11 00:34:10,622 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-11 00:34:11,308 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 35 [2021-03-11 00:34:11,756 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 26 [2021-03-11 00:34:13,020 WARN L205 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-03-11 00:34:14,615 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2021-03-11 00:34:15,382 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2021-03-11 00:34:15,963 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 37 [2021-03-11 00:34:17,398 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2021-03-11 00:34:18,487 WARN L205 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-03-11 00:34:19,168 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-03-11 00:34:19,553 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:34:20,250 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-03-11 00:34:21,627 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2021-03-11 00:34:23,488 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-03-11 00:34:24,731 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2021-03-11 00:34:26,135 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2021-03-11 00:34:27,079 WARN L205 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2021-03-11 00:34:28,902 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-03-11 00:34:29,834 WARN L205 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-03-11 00:34:30,628 WARN L205 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-03-11 00:34:31,269 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 45 [2021-03-11 00:34:32,831 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2021-03-11 00:34:33,565 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-03-11 00:34:34,226 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-03-11 00:34:35,062 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:34:35,445 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:34:36,062 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-11 00:34:36,431 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2021-03-11 00:34:36,718 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-11 00:34:36,898 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2021-03-11 00:34:38,270 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2021-03-11 00:34:39,477 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-03-11 00:34:41,007 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2021-03-11 00:34:41,600 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-03-11 00:34:42,654 WARN L205 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-03-11 00:34:43,601 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2021-03-11 00:34:44,264 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2021-03-11 00:34:46,262 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2021-03-11 00:34:48,019 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2021-03-11 00:34:50,002 WARN L205 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-03-11 00:34:51,357 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-03-11 00:34:52,234 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-11 00:34:52,614 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-11 00:34:53,364 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-11 00:34:54,251 WARN L205 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-03-11 00:34:54,929 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-03-11 00:34:55,580 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2021-03-11 00:34:56,039 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-03-11 00:34:56,414 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-11 00:34:57,777 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-03-11 00:34:59,337 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 97 DAG size of output: 54 [2021-03-11 00:35:03,397 WARN L205 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 116 DAG size of output: 87 [2021-03-11 00:35:05,908 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 113 DAG size of output: 86 [2021-03-11 00:35:08,155 WARN L205 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-03-11 00:35:09,209 WARN L205 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-03-11 00:35:10,666 WARN L205 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-03-11 00:35:11,664 WARN L205 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-03-11 00:35:12,529 WARN L205 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2021-03-11 00:35:14,162 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 123 DAG size of output: 83 [2021-03-11 00:35:37,556 WARN L205 SmtUtils]: Spent 23.19 s on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2021-03-11 00:35:39,314 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 131 DAG size of output: 86 [2021-03-11 00:35:39,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:35:39,949 INFO L93 Difference]: Finished difference Result 5042 states and 16945 transitions. [2021-03-11 00:35:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-11 00:35:39,955 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) 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 29 [2021-03-11 00:35:39,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:35:39,965 INFO L225 Difference]: With dead ends: 5042 [2021-03-11 00:35:39,965 INFO L226 Difference]: Without dead ends: 5027 [2021-03-11 00:35:39,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3372 ImplicationChecksByTransitivity, 103771.0ms TimeCoverageRelationStatistics Valid=1172, Invalid=7948, Unknown=0, NotChecked=0, Total=9120 [2021-03-11 00:35:39,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2021-03-11 00:35:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 2682. [2021-03-11 00:35:40,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2682 states, 2681 states have (on average 3.507273405445729) internal successors, (9403), 2681 states have internal predecessors, (9403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:35:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2682 states to 2682 states and 9403 transitions. [2021-03-11 00:35:40,012 INFO L78 Accepts]: Start accepts. Automaton has 2682 states and 9403 transitions. Word has length 29 [2021-03-11 00:35:40,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:35:40,012 INFO L480 AbstractCegarLoop]: Abstraction has 2682 states and 9403 transitions. [2021-03-11 00:35:40,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) 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) [2021-03-11 00:35:40,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2682 states and 9403 transitions. [2021-03-11 00:35:40,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:35:40,015 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:35:40,015 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:35:40,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1329,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:35:40,216 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:35:40,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:35:40,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1829857094, now seen corresponding path program 22 times [2021-03-11 00:35:40,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:35:40,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427152584] [2021-03-11 00:35:40,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:35:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:41,149 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-11 00:35:41,682 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-11 00:35:42,201 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-11 00:35:42,748 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-11 00:35:43,333 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-11 00:35:43,566 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:35:43,753 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-03-11 00:35:43,933 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-03-11 00:35:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:44,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427152584] [2021-03-11 00:35:44,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828215833] [2021-03-11 00:35:44,115 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:35:44,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:35:44,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:35:44,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-11 00:35:44,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:35:45,123 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:35:49,746 WARN L205 SmtUtils]: Spent 4.37 s on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:35:50,321 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-11 00:35:51,043 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-11 00:35:52,913 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-03-11 00:35:53,217 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_119, v_prenex_120], 7=[v_prenex_118, A, v_prenex_121, v_prenex_122]} [2021-03-11 00:35:53,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:53,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:53,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:53,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:53,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:35:53,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-03-11 00:35:53,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:35:54,143 WARN L205 SmtUtils]: Spent 824.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-11 00:35:54,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:35:54,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:54,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:54,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:54,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:54,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:35:54,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-03-11 00:35:54,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:35:55,034 WARN L205 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-03-11 00:35:55,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:35:55,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:55,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:55,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:55,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:55,238 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2021-03-11 00:35:55,239 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:35:55,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-03-11 00:35:55,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:35:55,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:55,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:55,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:55,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:55,439 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2021-03-11 00:35:55,441 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:35:55,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-03-11 00:35:55,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:35:56,726 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-03-11 00:35:56,728 INFO L628 ElimStorePlain]: treesize reduction 27, result has 90.2 percent of original size [2021-03-11 00:35:56,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:56,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:56,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:56,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:56,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:35:56,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-03-11 00:35:56,890 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:35:57,471 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-11 00:35:57,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:35:57,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:57,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:57,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:57,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:57,627 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2021-03-11 00:35:57,629 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:35:57,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-03-11 00:35:57,638 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:35:58,203 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-11 00:35:58,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:35:58,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:58,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:58,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:58,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:58,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:35:58,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-03-11 00:35:58,415 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:35:58,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:58,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:58,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:58,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:35:58,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-03-11 00:35:58,625 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:35:59,410 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-03-11 00:35:59,411 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.0 percent of original size [2021-03-11 00:35:59,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:35:59,424 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:82 [2021-03-11 00:36:00,244 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-11 00:36:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:00,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:00,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2021-03-11 00:36:00,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824878060] [2021-03-11 00:36:00,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-11 00:36:00,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:00,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-11 00:36:00,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:36:00,422 INFO L87 Difference]: Start difference. First operand 2682 states and 9403 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) 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) [2021-03-11 00:36:01,604 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-11 00:36:02,122 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-11 00:36:02,845 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-11 00:36:03,238 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-03-11 00:36:03,627 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:36:16,430 WARN L205 SmtUtils]: Spent 12.60 s on a formula simplification. DAG size of input: 84 DAG size of output: 40 [2021-03-11 00:36:16,861 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 26 [2021-03-11 00:36:17,858 WARN L205 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 Received shutdown request... [2021-03-11 00:36:27,503 WARN L222 SmtUtils]: Removed 9 from assertion stack [2021-03-11 00:36:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:36:27,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-03-11 00:36:27,703 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-11 00:36:27,706 WARN L224 ceAbstractionStarter]: Timeout [2021-03-11 00:36:27,707 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 12:36:27 BasicIcfg [2021-03-11 00:36:27,707 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 00:36:27,707 INFO L168 Benchmark]: Toolchain (without parser) took 858002.57 ms. Allocated memory was 255.9 MB in the beginning and 559.9 MB in the end (delta: 304.1 MB). Free memory was 236.4 MB in the beginning and 376.5 MB in the end (delta: -140.1 MB). Peak memory consumption was 166.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:36:27,707 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:36:27,707 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.93 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:36:27,707 INFO L168 Benchmark]: Boogie Preprocessor took 15.03 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:36:27,707 INFO L168 Benchmark]: RCFGBuilder took 281.23 ms. Allocated memory is still 255.9 MB. Free memory was 233.1 MB in the beginning and 236.3 MB in the end (delta: -3.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-03-11 00:36:27,707 INFO L168 Benchmark]: TraceAbstraction took 857680.25 ms. Allocated memory was 255.9 MB in the beginning and 559.9 MB in the end (delta: 304.1 MB). Free memory was 235.6 MB in the beginning and 376.5 MB in the end (delta: -140.9 MB). Peak memory consumption was 164.7 MB. Max. memory is 16.0 GB. [2021-03-11 00:36:27,707 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.93 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.03 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 281.23 ms. Allocated memory is still 255.9 MB. Free memory was 233.1 MB in the beginning and 236.3 MB in the end (delta: -3.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 857680.25 ms. Allocated memory was 255.9 MB in the beginning and 559.9 MB in the end (delta: 304.1 MB). Free memory was 235.6 MB in the beginning and 376.5 MB in the end (delta: -140.9 MB). Peak memory consumption was 164.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 69). Cancelled while BasicCegarLoop was constructing difference of abstraction (2682states) and FLOYD_HOARE automaton (currently 18 states, 28 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 85 for 9230ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 857559.5ms, OverallIterations: 103, TraceHistogramMax: 2, EmptinessCheckTime: 206.5ms, AutomataDifference: 647057.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4235 SDtfs, 24126 SDslu, 29388 SDs, 0 SdLazy, 49721 SolverSat, 4142 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 50248.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5594 GetRequests, 2039 SyntacticMatches, 77 SemanticMatches, 3477 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55389 ImplicationChecksByTransitivity, 694597.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2682occurred in iteration=102, InterpolantAutomatonStates: 2905, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2233.4ms AutomataMinimizationTime, 102 MinimizatonAttempts, 89038 StatesRemovedByMinimization, 102 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 315.5ms SsaConstructionTime, 865.0ms SatisfiabilityAnalysisTime, 185494.1ms InterpolantComputationTime, 5356 NumberOfCodeBlocks, 5356 NumberOfCodeBlocksAsserted, 309 NumberOfCheckSat, 5158 ConstructedInterpolants, 80 QuantifiedInterpolants, 63332 SizeOfPredicates, 415 NumberOfNonLiveVariables, 5554 ConjunctsInSsa, 1066 ConjunctsInUnsatCore, 198 InterpolantComputations, 8 PerfectInterpolantSequences, 245/951 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown