/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/array-eq-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 03:48:53,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 03:48:53,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 03:48:53,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 03:48:53,680 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 03:48:53,703 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 03:48:53,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 03:48:53,704 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 03:48:53,704 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 03:48:53,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 03:48:53,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 03:48:53,705 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 03:48:53,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 03:48:53,705 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 03:48:53,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 03:48:53,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 03:48:53,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 03:48:53,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 03:48:53,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 03:48:53,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 03:48:53,706 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 03:48:53,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 03:48:53,706 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 03:48:53,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 03:48:53,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 03:48:53,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 03:48:53,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 03:48:53,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 03:48:53,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:48:53,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 03:48:53,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 03:48:53,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 03:48:53,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 03:48:53,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 03:48:53,707 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 03:48:53,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 03:48:53,707 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 03:48:53,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 03:48:53,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 03:48:53,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 03:48:53,960 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 03:48:53,961 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 03:48:53,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl [2021-06-05 03:48:54,107 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl' [2021-06-05 03:48:54,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 03:48:54,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 03:48:54,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 03:48:54,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 03:48:54,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 03:48:54,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:54" (1/1) ... [2021-06-05 03:48:54,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:54" (1/1) ... [2021-06-05 03:48:54,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 03:48:54,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 03:48:54,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 03:48:54,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 03:48:54,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:54" (1/1) ... [2021-06-05 03:48:54,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:54" (1/1) ... [2021-06-05 03:48:54,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:54" (1/1) ... [2021-06-05 03:48:54,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:54" (1/1) ... [2021-06-05 03:48:54,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:54" (1/1) ... [2021-06-05 03:48:54,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:54" (1/1) ... [2021-06-05 03:48:54,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:54" (1/1) ... [2021-06-05 03:48:54,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 03:48:54,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 03:48:54,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 03:48:54,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 03:48:54,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:48:54,263 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 03:48:54,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 03:48:54,264 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 03:48:54,264 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 03:48:54,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 03:48:54,264 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 03:48:54,265 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 03:48:54,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 03:48:54,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 03:48:54,265 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 03:48:54,266 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 03:48:54,266 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 03:48:54,267 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 03:48:54,452 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 03:48:54,452 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 03:48:54,453 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:48:54 BoogieIcfgContainer [2021-06-05 03:48:54,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 03:48:54,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 03:48:54,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 03:48:54,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 03:48:54,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:54" (1/2) ... [2021-06-05 03:48:54,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6ffc93 and model type array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:48:54, skipping insertion in model container [2021-06-05 03:48:54,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:48:54" (2/2) ... [2021-06-05 03:48:54,459 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.bpl [2021-06-05 03:48:54,462 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 03:48:54,462 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 03:48:54,463 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 03:48:54,477 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 03:48:54,525 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 03:48:54,547 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 03:48:54,560 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:48:54,560 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:48:54,560 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:48:54,560 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:48:54,560 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:48:54,560 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:48:54,560 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:48:54,560 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:48:54,566 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 35 transitions, 94 flow [2021-06-05 03:48:54,593 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 307 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 306 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:54,596 INFO L276 IsEmpty]: Start isEmpty. Operand has 307 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 306 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:54,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:48:54,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:54,613 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:54,614 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:54,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:54,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1022226388, now seen corresponding path program 1 times [2021-06-05 03:48:54,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:54,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537363793] [2021-06-05 03:48:54,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:54,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:54,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537363793] [2021-06-05 03:48:54,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537363793] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:48:54,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:48:54,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:48:54,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117992619] [2021-06-05 03:48:54,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:48:54,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:54,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:48:54,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:54,857 INFO L87 Difference]: Start difference. First operand has 307 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 306 states have internal predecessors, (1029), 0 states have call successors, (0), 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 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:54,976 INFO L93 Difference]: Finished difference Result 606 states and 2050 transitions. [2021-06-05 03:48:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:48:54,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 03:48:54,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:54,990 INFO L225 Difference]: With dead ends: 606 [2021-06-05 03:48:54,990 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 03:48:54,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:55,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 03:48:55,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 406. [2021-06-05 03:48:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.3580246913580245) internal successors, (1360), 405 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1360 transitions. [2021-06-05 03:48:55,047 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1360 transitions. Word has length 15 [2021-06-05 03:48:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:55,047 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1360 transitions. [2021-06-05 03:48:55,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1360 transitions. [2021-06-05 03:48:55,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:48:55,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:55,050 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:55,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 03:48:55,050 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:55,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:55,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1372690376, now seen corresponding path program 1 times [2021-06-05 03:48:55,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:55,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885632630] [2021-06-05 03:48:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:55,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:55,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885632630] [2021-06-05 03:48:55,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885632630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:55,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798359096] [2021-06-05 03:48:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:55,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:48:55,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:55,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798359096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:55,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:55,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 03:48:55,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11553531] [2021-06-05 03:48:55,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:48:55,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:55,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:48:55,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:55,296 INFO L87 Difference]: Start difference. First operand 406 states and 1360 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:55,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:55,390 INFO L93 Difference]: Finished difference Result 1011 states and 3270 transitions. [2021-06-05 03:48:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:48:55,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:48:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:55,396 INFO L225 Difference]: With dead ends: 1011 [2021-06-05 03:48:55,397 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 03:48:55,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:55,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 03:48:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 440. [2021-06-05 03:48:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.359908883826879) internal successors, (1475), 439 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1475 transitions. [2021-06-05 03:48:55,435 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1475 transitions. Word has length 18 [2021-06-05 03:48:55,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:55,435 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 1475 transitions. [2021-06-05 03:48:55,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1475 transitions. [2021-06-05 03:48:55,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:48:55,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:55,440 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:55,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 03:48:55,660 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:55,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:55,660 INFO L82 PathProgramCache]: Analyzing trace with hash -910224837, now seen corresponding path program 1 times [2021-06-05 03:48:55,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:55,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917886840] [2021-06-05 03:48:55,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:55,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:55,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917886840] [2021-06-05 03:48:55,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917886840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:55,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911864270] [2021-06-05 03:48:55,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:55,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:55,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:55,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911864270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:55,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:55,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 03:48:55,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852686425] [2021-06-05 03:48:55,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:48:55,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:55,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:48:55,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:55,989 INFO L87 Difference]: Start difference. First operand 440 states and 1475 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-06-05 03:48:56,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:56,400 INFO L93 Difference]: Finished difference Result 1656 states and 5504 transitions. [2021-06-05 03:48:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:48:56,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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 18 [2021-06-05 03:48:56,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:56,407 INFO L225 Difference]: With dead ends: 1656 [2021-06-05 03:48:56,407 INFO L226 Difference]: Without dead ends: 1415 [2021-06-05 03:48:56,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:48:56,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-06-05 03:48:56,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 637. [2021-06-05 03:48:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.49685534591195) internal successors, (2224), 636 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:56,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2224 transitions. [2021-06-05 03:48:56,426 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2224 transitions. Word has length 18 [2021-06-05 03:48:56,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:56,427 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 2224 transitions. [2021-06-05 03:48:56,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-06-05 03:48:56,427 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2224 transitions. [2021-06-05 03:48:56,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:48:56,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:56,429 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:56,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:56,645 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:56,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:56,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1302877552, now seen corresponding path program 1 times [2021-06-05 03:48:56,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:56,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140239736] [2021-06-05 03:48:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:56,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:56,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140239736] [2021-06-05 03:48:56,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140239736] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:48:56,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:48:56,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:48:56,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445494240] [2021-06-05 03:48:56,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:48:56,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:56,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:48:56,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:56,680 INFO L87 Difference]: Start difference. First operand 637 states and 2224 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:56,746 INFO L93 Difference]: Finished difference Result 1343 states and 4620 transitions. [2021-06-05 03:48:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:48:56,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:48:56,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:56,751 INFO L225 Difference]: With dead ends: 1343 [2021-06-05 03:48:56,751 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 03:48:56,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:56,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 03:48:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 792. [2021-06-05 03:48:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4829329962073325) internal successors, (2755), 791 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2755 transitions. [2021-06-05 03:48:56,771 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2755 transitions. Word has length 18 [2021-06-05 03:48:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:56,771 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2755 transitions. [2021-06-05 03:48:56,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2755 transitions. [2021-06-05 03:48:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:48:56,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:56,773 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:56,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 03:48:56,773 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:56,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:56,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1936831982, now seen corresponding path program 2 times [2021-06-05 03:48:56,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:56,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483308154] [2021-06-05 03:48:56,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:56,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:56,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483308154] [2021-06-05 03:48:56,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483308154] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:48:56,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:48:56,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:48:56,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072063431] [2021-06-05 03:48:56,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:48:56,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:56,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:48:56,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:56,805 INFO L87 Difference]: Start difference. First operand 792 states and 2755 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:56,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:56,868 INFO L93 Difference]: Finished difference Result 1367 states and 4635 transitions. [2021-06-05 03:48:56,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:48:56,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:48:56,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:56,874 INFO L225 Difference]: With dead ends: 1367 [2021-06-05 03:48:56,874 INFO L226 Difference]: Without dead ends: 1199 [2021-06-05 03:48:56,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:56,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-06-05 03:48:56,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 810. [2021-06-05 03:48:56,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.4561186650185416) internal successors, (2796), 809 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:56,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2796 transitions. [2021-06-05 03:48:56,895 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2796 transitions. Word has length 18 [2021-06-05 03:48:56,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:56,896 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2796 transitions. [2021-06-05 03:48:56,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2796 transitions. [2021-06-05 03:48:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:48:56,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:56,898 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:56,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 03:48:56,898 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:56,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:56,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1545690414, now seen corresponding path program 2 times [2021-06-05 03:48:56,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:56,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063622845] [2021-06-05 03:48:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:56,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:56,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063622845] [2021-06-05 03:48:56,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063622845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:56,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459067262] [2021-06-05 03:48:56,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:56,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:48:56,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:56,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:56,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:57,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459067262] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:48:57,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 03:48:57,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2021-06-05 03:48:57,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122059833] [2021-06-05 03:48:57,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:48:57,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:57,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:48:57,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:57,116 INFO L87 Difference]: Start difference. First operand 810 states and 2796 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:57,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:57,272 INFO L93 Difference]: Finished difference Result 1377 states and 4559 transitions. [2021-06-05 03:48:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:48:57,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:48:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:57,278 INFO L225 Difference]: With dead ends: 1377 [2021-06-05 03:48:57,279 INFO L226 Difference]: Without dead ends: 1220 [2021-06-05 03:48:57,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:48:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-06-05 03:48:57,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 804. [2021-06-05 03:48:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.460772104607721) internal successors, (2779), 803 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2779 transitions. [2021-06-05 03:48:57,301 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2779 transitions. Word has length 18 [2021-06-05 03:48:57,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:57,302 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2779 transitions. [2021-06-05 03:48:57,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:57,302 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2779 transitions. [2021-06-05 03:48:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:48:57,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:57,303 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:57,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:57,517 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:57,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:57,517 INFO L82 PathProgramCache]: Analyzing trace with hash -678642568, now seen corresponding path program 3 times [2021-06-05 03:48:57,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:57,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285204647] [2021-06-05 03:48:57,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:57,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:57,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285204647] [2021-06-05 03:48:57,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285204647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:57,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756166088] [2021-06-05 03:48:57,557 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 [2021-06-05 03:48:57,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 03:48:57,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:57,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:57,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:57,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756166088] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:48:57,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 03:48:57,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2021-06-05 03:48:57,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745872282] [2021-06-05 03:48:57,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:48:57,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:57,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:48:57,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:57,683 INFO L87 Difference]: Start difference. First operand 804 states and 2779 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:57,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:57,854 INFO L93 Difference]: Finished difference Result 1697 states and 5759 transitions. [2021-06-05 03:48:57,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:48:57,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:48:57,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:57,862 INFO L225 Difference]: With dead ends: 1697 [2021-06-05 03:48:57,862 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 03:48:57,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:48:57,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 03:48:57,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 817. [2021-06-05 03:48:57,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.450980392156863) internal successors, (2816), 816 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2816 transitions. [2021-06-05 03:48:57,885 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2816 transitions. Word has length 18 [2021-06-05 03:48:57,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:57,885 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 2816 transitions. [2021-06-05 03:48:57,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:57,886 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2816 transitions. [2021-06-05 03:48:57,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:48:57,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:57,888 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:58,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:58,107 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:58,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:58,107 INFO L82 PathProgramCache]: Analyzing trace with hash -437071600, now seen corresponding path program 4 times [2021-06-05 03:48:58,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:58,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744623224] [2021-06-05 03:48:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:58,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:58,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744623224] [2021-06-05 03:48:58,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744623224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:58,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223905099] [2021-06-05 03:48:58,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:58,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:48:58,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:58,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:48:58,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:58,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223905099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:58,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:58,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 03:48:58,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103422840] [2021-06-05 03:48:58,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:48:58,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:58,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:48:58,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:58,264 INFO L87 Difference]: Start difference. First operand 817 states and 2816 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:58,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:58,359 INFO L93 Difference]: Finished difference Result 1418 states and 4750 transitions. [2021-06-05 03:48:58,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:48:58,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:48:58,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:58,365 INFO L225 Difference]: With dead ends: 1418 [2021-06-05 03:48:58,365 INFO L226 Difference]: Without dead ends: 1116 [2021-06-05 03:48:58,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:48:58,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-05 03:48:58,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 707. [2021-06-05 03:48:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.4674220963172804) internal successors, (2448), 706 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2448 transitions. [2021-06-05 03:48:58,383 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2448 transitions. Word has length 18 [2021-06-05 03:48:58,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:58,383 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2448 transitions. [2021-06-05 03:48:58,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:58,384 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2448 transitions. [2021-06-05 03:48:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:48:58,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:58,385 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:58,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:58,593 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:58,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:58,593 INFO L82 PathProgramCache]: Analyzing trace with hash -517394769, now seen corresponding path program 1 times [2021-06-05 03:48:58,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:58,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257933293] [2021-06-05 03:48:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:58,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:58,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257933293] [2021-06-05 03:48:58,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257933293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:58,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46816222] [2021-06-05 03:48:58,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:58,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:48:58,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:58,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 03:48:58,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:48:58,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:48:58,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:48:58,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 03:48:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:58,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46816222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:58,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:58,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 03:48:58,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022312410] [2021-06-05 03:48:58,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:48:58,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:58,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:48:58,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:58,774 INFO L87 Difference]: Start difference. First operand 707 states and 2448 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:59,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:59,504 INFO L93 Difference]: Finished difference Result 3825 states and 12801 transitions. [2021-06-05 03:48:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 03:48:59,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 21 [2021-06-05 03:48:59,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:59,519 INFO L225 Difference]: With dead ends: 3825 [2021-06-05 03:48:59,519 INFO L226 Difference]: Without dead ends: 3619 [2021-06-05 03:48:59,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=232, Invalid=698, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:48:59,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-06-05 03:48:59,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 1302. [2021-06-05 03:48:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.6541122213681785) internal successors, (4754), 1301 states have internal predecessors, (4754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4754 transitions. [2021-06-05 03:48:59,561 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4754 transitions. Word has length 21 [2021-06-05 03:48:59,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:59,561 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4754 transitions. [2021-06-05 03:48:59,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:59,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4754 transitions. [2021-06-05 03:48:59,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:48:59,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:59,564 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:59,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:59,781 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:59,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:59,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1831057363, now seen corresponding path program 1 times [2021-06-05 03:48:59,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:59,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462107184] [2021-06-05 03:48:59,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:59,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:59,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462107184] [2021-06-05 03:48:59,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462107184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:59,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484654704] [2021-06-05 03:48:59,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:59,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:48:59,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:59,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484654704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:59,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:59,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 03:48:59,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593858790] [2021-06-05 03:48:59,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:48:59,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:59,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:48:59,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:59,936 INFO L87 Difference]: Start difference. First operand 1302 states and 4754 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:00,645 INFO L93 Difference]: Finished difference Result 3835 states and 12901 transitions. [2021-06-05 03:49:00,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:49:00,645 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 21 [2021-06-05 03:49:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:00,658 INFO L225 Difference]: With dead ends: 3835 [2021-06-05 03:49:00,658 INFO L226 Difference]: Without dead ends: 3583 [2021-06-05 03:49:00,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 446.4ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:49:00,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2021-06-05 03:49:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 1499. [2021-06-05 03:49:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.6348464619492655) internal successors, (5445), 1498 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:00,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 5445 transitions. [2021-06-05 03:49:00,698 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 5445 transitions. Word has length 21 [2021-06-05 03:49:00,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:00,698 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 5445 transitions. [2021-06-05 03:49:00,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:00,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 5445 transitions. [2021-06-05 03:49:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:49:00,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:00,701 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:00,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 03:49:00,913 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:00,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1851685711, now seen corresponding path program 2 times [2021-06-05 03:49:00,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:00,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284922625] [2021-06-05 03:49:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:00,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:00,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284922625] [2021-06-05 03:49:00,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284922625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:00,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840428122] [2021-06-05 03:49:00,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:00,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:00,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:00,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:49:00,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:01,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840428122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:01,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:01,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 03:49:01,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948302231] [2021-06-05 03:49:01,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:49:01,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:49:01,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:49:01,030 INFO L87 Difference]: Start difference. First operand 1499 states and 5445 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:01,216 INFO L93 Difference]: Finished difference Result 2934 states and 10298 transitions. [2021-06-05 03:49:01,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:01,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:49:01,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:01,224 INFO L225 Difference]: With dead ends: 2934 [2021-06-05 03:49:01,224 INFO L226 Difference]: Without dead ends: 2934 [2021-06-05 03:49:01,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-06-05 03:49:01,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 1307. [2021-06-05 03:49:01,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 3.627105666156202) internal successors, (4737), 1306 states have internal predecessors, (4737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4737 transitions. [2021-06-05 03:49:01,255 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4737 transitions. Word has length 21 [2021-06-05 03:49:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:01,255 INFO L482 AbstractCegarLoop]: Abstraction has 1307 states and 4737 transitions. [2021-06-05 03:49:01,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4737 transitions. [2021-06-05 03:49:01,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:49:01,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:01,258 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:01,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 03:49:01,472 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:01,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:01,472 INFO L82 PathProgramCache]: Analyzing trace with hash 801774587, now seen corresponding path program 3 times [2021-06-05 03:49:01,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:01,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863342786] [2021-06-05 03:49:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:01,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:01,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863342786] [2021-06-05 03:49:01,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863342786] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:49:01,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:49:01,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:49:01,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207779172] [2021-06-05 03:49:01,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:49:01,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:01,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:49:01,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:49:01,494 INFO L87 Difference]: Start difference. First operand 1307 states and 4737 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2021-06-05 03:49:01,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:01,585 INFO L93 Difference]: Finished difference Result 2081 states and 7468 transitions. [2021-06-05 03:49:01,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:49:01,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 [2021-06-05 03:49:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:01,591 INFO L225 Difference]: With dead ends: 2081 [2021-06-05 03:49:01,591 INFO L226 Difference]: Without dead ends: 2063 [2021-06-05 03:49:01,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:49:01,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-05 03:49:01,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1303. [2021-06-05 03:49:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.6267281105990783) internal successors, (4722), 1302 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:01,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4722 transitions. [2021-06-05 03:49:01,638 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4722 transitions. Word has length 21 [2021-06-05 03:49:01,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:01,638 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 4722 transitions. [2021-06-05 03:49:01,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2021-06-05 03:49:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4722 transitions. [2021-06-05 03:49:01,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:49:01,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:01,641 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:01,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 03:49:01,641 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:01,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:01,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2028027159, now seen corresponding path program 2 times [2021-06-05 03:49:01,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:01,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201006313] [2021-06-05 03:49:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:01,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:01,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201006313] [2021-06-05 03:49:01,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201006313] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:49:01,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:49:01,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:49:01,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292241152] [2021-06-05 03:49:01,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:49:01,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:01,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:49:01,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:49:01,662 INFO L87 Difference]: Start difference. First operand 1303 states and 4722 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2021-06-05 03:49:01,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:01,730 INFO L93 Difference]: Finished difference Result 2051 states and 7360 transitions. [2021-06-05 03:49:01,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:49:01,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 [2021-06-05 03:49:01,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:01,735 INFO L225 Difference]: With dead ends: 2051 [2021-06-05 03:49:01,736 INFO L226 Difference]: Without dead ends: 2045 [2021-06-05 03:49:01,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:49:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-06-05 03:49:01,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1327. [2021-06-05 03:49:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 3.6093514328808447) internal successors, (4786), 1326 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 4786 transitions. [2021-06-05 03:49:01,762 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 4786 transitions. Word has length 21 [2021-06-05 03:49:01,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:01,762 INFO L482 AbstractCegarLoop]: Abstraction has 1327 states and 4786 transitions. [2021-06-05 03:49:01,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2021-06-05 03:49:01,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 4786 transitions. [2021-06-05 03:49:01,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:49:01,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:01,765 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:01,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 03:49:01,765 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:01,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:01,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1122312109, now seen corresponding path program 4 times [2021-06-05 03:49:01,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:01,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931911579] [2021-06-05 03:49:01,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:01,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:01,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931911579] [2021-06-05 03:49:01,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931911579] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:49:01,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:49:01,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:49:01,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131057822] [2021-06-05 03:49:01,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:49:01,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:01,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:49:01,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:49:01,786 INFO L87 Difference]: Start difference. First operand 1327 states and 4786 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2021-06-05 03:49:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:01,840 INFO L93 Difference]: Finished difference Result 1854 states and 6806 transitions. [2021-06-05 03:49:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:49:01,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 [2021-06-05 03:49:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:01,844 INFO L225 Difference]: With dead ends: 1854 [2021-06-05 03:49:01,845 INFO L226 Difference]: Without dead ends: 1840 [2021-06-05 03:49:01,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:49:01,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-06-05 03:49:01,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1265. [2021-06-05 03:49:01,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.6360759493670884) internal successors, (4596), 1264 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4596 transitions. [2021-06-05 03:49:01,868 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4596 transitions. Word has length 21 [2021-06-05 03:49:01,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:01,868 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4596 transitions. [2021-06-05 03:49:01,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2021-06-05 03:49:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4596 transitions. [2021-06-05 03:49:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:01,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:01,871 INFO L521 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] [2021-06-05 03:49:01,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 03:49:01,871 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:01,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:01,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1455380781, now seen corresponding path program 1 times [2021-06-05 03:49:01,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:01,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329318377] [2021-06-05 03:49:01,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:01,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:01,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329318377] [2021-06-05 03:49:01,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329318377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:01,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138390240] [2021-06-05 03:49:01,922 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 [2021-06-05 03:49:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:01,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:49:01,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:02,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138390240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:02,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:02,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:49:02,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279804783] [2021-06-05 03:49:02,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:49:02,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:02,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:49:02,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:02,071 INFO L87 Difference]: Start difference. First operand 1265 states and 4596 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:02,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:02,384 INFO L93 Difference]: Finished difference Result 3756 states and 13001 transitions. [2021-06-05 03:49:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:49:02,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:49:02,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:02,392 INFO L225 Difference]: With dead ends: 3756 [2021-06-05 03:49:02,392 INFO L226 Difference]: Without dead ends: 3032 [2021-06-05 03:49:02,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:49:02,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-06-05 03:49:02,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2042. [2021-06-05 03:49:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 2041 states have (on average 3.724154826065654) internal successors, (7601), 2041 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:02,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 7601 transitions. [2021-06-05 03:49:02,460 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 7601 transitions. Word has length 24 [2021-06-05 03:49:02,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:02,460 INFO L482 AbstractCegarLoop]: Abstraction has 2042 states and 7601 transitions. [2021-06-05 03:49:02,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:02,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 7601 transitions. [2021-06-05 03:49:02,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:02,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:02,465 INFO L521 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] [2021-06-05 03:49:02,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 03:49:02,683 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:02,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:02,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2096711821, now seen corresponding path program 2 times [2021-06-05 03:49:02,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:02,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816188352] [2021-06-05 03:49:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:02,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:02,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816188352] [2021-06-05 03:49:02,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816188352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:02,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146988927] [2021-06-05 03:49:02,743 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) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:02,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:02,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:02,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:49:02,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:02,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146988927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:02,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:02,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:49:02,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475940112] [2021-06-05 03:49:02,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:49:02,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:02,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:49:02,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:02,870 INFO L87 Difference]: Start difference. First operand 2042 states and 7601 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:03,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:03,174 INFO L93 Difference]: Finished difference Result 3819 states and 13270 transitions. [2021-06-05 03:49:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:49:03,174 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:49:03,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:03,182 INFO L225 Difference]: With dead ends: 3819 [2021-06-05 03:49:03,182 INFO L226 Difference]: Without dead ends: 3419 [2021-06-05 03:49:03,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:49:03,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3419 states. [2021-06-05 03:49:03,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3419 to 2196. [2021-06-05 03:49:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 3.7599088838268795) internal successors, (8253), 2195 states have internal predecessors, (8253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:03,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 8253 transitions. [2021-06-05 03:49:03,231 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 8253 transitions. Word has length 24 [2021-06-05 03:49:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:03,231 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 8253 transitions. [2021-06-05 03:49:03,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:03,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 8253 transitions. [2021-06-05 03:49:03,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:03,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:03,235 INFO L521 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] [2021-06-05 03:49:03,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 03:49:03,457 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:03,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:03,457 INFO L82 PathProgramCache]: Analyzing trace with hash -337245367, now seen corresponding path program 3 times [2021-06-05 03:49:03,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:03,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124862845] [2021-06-05 03:49:03,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:03,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:03,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124862845] [2021-06-05 03:49:03,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124862845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:03,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262404833] [2021-06-05 03:49:03,523 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:03,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:49:03,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:03,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:49:03,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:03,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262404833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:03,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:03,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 03:49:03,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187873438] [2021-06-05 03:49:03,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:49:03,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:03,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:49:03,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:03,670 INFO L87 Difference]: Start difference. First operand 2196 states and 8253 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:04,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:04,092 INFO L93 Difference]: Finished difference Result 4185 states and 15168 transitions. [2021-06-05 03:49:04,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:49:04,092 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:49:04,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:04,099 INFO L225 Difference]: With dead ends: 4185 [2021-06-05 03:49:04,099 INFO L226 Difference]: Without dead ends: 3585 [2021-06-05 03:49:04,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 266.8ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:49:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2021-06-05 03:49:04,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 2406. [2021-06-05 03:49:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2405 states have (on average 3.761330561330561) internal successors, (9046), 2405 states have internal predecessors, (9046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:04,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 9046 transitions. [2021-06-05 03:49:04,152 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 9046 transitions. Word has length 24 [2021-06-05 03:49:04,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:04,152 INFO L482 AbstractCegarLoop]: Abstraction has 2406 states and 9046 transitions. [2021-06-05 03:49:04,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:04,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 9046 transitions. [2021-06-05 03:49:04,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:04,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:04,157 INFO L521 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] [2021-06-05 03:49:04,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 03:49:04,373 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:04,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:04,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1257907469, now seen corresponding path program 1 times [2021-06-05 03:49:04,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:04,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303386633] [2021-06-05 03:49:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:04,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:04,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303386633] [2021-06-05 03:49:04,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303386633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:04,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679678369] [2021-06-05 03:49:04,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:04,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:49:04,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:04,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 03:49:04,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:04,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:49:04,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:04,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 03:49:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:04,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679678369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:04,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:04,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 03:49:04,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132645444] [2021-06-05 03:49:04,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:04,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:04,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:04,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:04,518 INFO L87 Difference]: Start difference. First operand 2406 states and 9046 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:04,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:04,739 INFO L93 Difference]: Finished difference Result 4184 states and 14954 transitions. [2021-06-05 03:49:04,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:04,739 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 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 24 [2021-06-05 03:49:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:04,745 INFO L225 Difference]: With dead ends: 4184 [2021-06-05 03:49:04,745 INFO L226 Difference]: Without dead ends: 3609 [2021-06-05 03:49:04,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:04,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-06-05 03:49:04,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 2825. [2021-06-05 03:49:04,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2824 states have (on average 3.685198300283286) internal successors, (10407), 2824 states have internal predecessors, (10407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:04,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 10407 transitions. [2021-06-05 03:49:04,797 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 10407 transitions. Word has length 24 [2021-06-05 03:49:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:04,797 INFO L482 AbstractCegarLoop]: Abstraction has 2825 states and 10407 transitions. [2021-06-05 03:49:04,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 10407 transitions. [2021-06-05 03:49:04,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:04,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:04,802 INFO L521 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] [2021-06-05 03:49:05,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 03:49:05,021 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:05,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:05,021 INFO L82 PathProgramCache]: Analyzing trace with hash -37818295, now seen corresponding path program 2 times [2021-06-05 03:49:05,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:05,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293694676] [2021-06-05 03:49:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:05,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:05,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293694676] [2021-06-05 03:49:05,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293694676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:05,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508558860] [2021-06-05 03:49:05,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:05,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:05,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:05,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:49:05,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:05,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 03:49:05,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:05,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:49:05,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:05,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 03:49:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:05,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508558860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:05,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:05,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 03:49:05,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765944495] [2021-06-05 03:49:05,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:05,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:05,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:05,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:05,155 INFO L87 Difference]: Start difference. First operand 2825 states and 10407 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:05,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:05,373 INFO L93 Difference]: Finished difference Result 4952 states and 17662 transitions. [2021-06-05 03:49:05,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:05,374 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 24 [2021-06-05 03:49:05,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:05,382 INFO L225 Difference]: With dead ends: 4952 [2021-06-05 03:49:05,383 INFO L226 Difference]: Without dead ends: 4907 [2021-06-05 03:49:05,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:05,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4907 states. [2021-06-05 03:49:05,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4907 to 3559. [2021-06-05 03:49:05,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 3558 states have (on average 3.7141652613827993) internal successors, (13215), 3558 states have internal predecessors, (13215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 13215 transitions. [2021-06-05 03:49:05,450 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 13215 transitions. Word has length 24 [2021-06-05 03:49:05,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:05,450 INFO L482 AbstractCegarLoop]: Abstraction has 3559 states and 13215 transitions. [2021-06-05 03:49:05,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:05,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 13215 transitions. [2021-06-05 03:49:05,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:05,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:05,456 INFO L521 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] [2021-06-05 03:49:05,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:05,672 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:05,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:05,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1702471575, now seen corresponding path program 1 times [2021-06-05 03:49:05,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:05,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931290098] [2021-06-05 03:49:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:05,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:05,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931290098] [2021-06-05 03:49:05,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931290098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:05,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488626610] [2021-06-05 03:49:05,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:05,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:49:05,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:05,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488626610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:05,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:05,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:49:05,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354993589] [2021-06-05 03:49:05,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:49:05,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:05,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:49:05,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:05,941 INFO L87 Difference]: Start difference. First operand 3559 states and 13215 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-06-05 03:49:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:06,151 INFO L93 Difference]: Finished difference Result 4119 states and 14931 transitions. [2021-06-05 03:49:06,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:49:06,151 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 24 [2021-06-05 03:49:06,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:06,158 INFO L225 Difference]: With dead ends: 4119 [2021-06-05 03:49:06,158 INFO L226 Difference]: Without dead ends: 3762 [2021-06-05 03:49:06,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:49:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2021-06-05 03:49:06,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3576. [2021-06-05 03:49:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3576 states, 3575 states have (on average 3.7023776223776226) internal successors, (13236), 3575 states have internal predecessors, (13236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3576 states to 3576 states and 13236 transitions. [2021-06-05 03:49:06,217 INFO L78 Accepts]: Start accepts. Automaton has 3576 states and 13236 transitions. Word has length 24 [2021-06-05 03:49:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:06,217 INFO L482 AbstractCegarLoop]: Abstraction has 3576 states and 13236 transitions. [2021-06-05 03:49:06,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-06-05 03:49:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 3576 states and 13236 transitions. [2021-06-05 03:49:06,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:06,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:06,224 INFO L521 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] [2021-06-05 03:49:06,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:06,437 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:06,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1483062673, now seen corresponding path program 2 times [2021-06-05 03:49:06,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:06,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461392599] [2021-06-05 03:49:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:06,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:06,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461392599] [2021-06-05 03:49:06,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461392599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:06,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767850107] [2021-06-05 03:49:06,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:06,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:06,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:06,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:49:06,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:06,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767850107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:06,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:06,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:49:06,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202198698] [2021-06-05 03:49:06,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:49:06,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:06,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:49:06,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:06,741 INFO L87 Difference]: Start difference. First operand 3576 states and 13236 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-06-05 03:49:07,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:07,025 INFO L93 Difference]: Finished difference Result 4175 states and 15081 transitions. [2021-06-05 03:49:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:07,026 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 24 [2021-06-05 03:49:07,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:07,033 INFO L225 Difference]: With dead ends: 4175 [2021-06-05 03:49:07,033 INFO L226 Difference]: Without dead ends: 3615 [2021-06-05 03:49:07,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:49:07,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2021-06-05 03:49:07,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3429. [2021-06-05 03:49:07,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.731330221703617) internal successors, (12791), 3428 states have internal predecessors, (12791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 12791 transitions. [2021-06-05 03:49:07,088 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 12791 transitions. Word has length 24 [2021-06-05 03:49:07,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:07,089 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 12791 transitions. [2021-06-05 03:49:07,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-06-05 03:49:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 12791 transitions. [2021-06-05 03:49:07,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:07,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:07,095 INFO L521 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] [2021-06-05 03:49:07,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 03:49:07,312 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:07,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:07,312 INFO L82 PathProgramCache]: Analyzing trace with hash -712088919, now seen corresponding path program 1 times [2021-06-05 03:49:07,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:07,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591869282] [2021-06-05 03:49:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:07,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:07,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591869282] [2021-06-05 03:49:07,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591869282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:07,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364238553] [2021-06-05 03:49:07,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:07,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:49:07,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:07,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364238553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:07,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:07,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 03:49:07,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738735031] [2021-06-05 03:49:07,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:49:07,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:07,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:49:07,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:07,543 INFO L87 Difference]: Start difference. First operand 3429 states and 12791 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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) [2021-06-05 03:49:07,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:07,833 INFO L93 Difference]: Finished difference Result 4987 states and 17858 transitions. [2021-06-05 03:49:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:07,833 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 24 [2021-06-05 03:49:07,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:07,881 INFO L225 Difference]: With dead ends: 4987 [2021-06-05 03:49:07,881 INFO L226 Difference]: Without dead ends: 3821 [2021-06-05 03:49:07,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:49:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2021-06-05 03:49:07,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 3319. [2021-06-05 03:49:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 3318 states have (on average 3.648583484026522) internal successors, (12106), 3318 states have internal predecessors, (12106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 12106 transitions. [2021-06-05 03:49:07,934 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 12106 transitions. Word has length 24 [2021-06-05 03:49:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:07,935 INFO L482 AbstractCegarLoop]: Abstraction has 3319 states and 12106 transitions. [2021-06-05 03:49:07,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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) [2021-06-05 03:49:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 12106 transitions. [2021-06-05 03:49:07,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:07,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:07,941 INFO L521 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] [2021-06-05 03:49:08,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:08,155 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:08,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:08,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1948181261, now seen corresponding path program 1 times [2021-06-05 03:49:08,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:08,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242778369] [2021-06-05 03:49:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:08,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:08,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242778369] [2021-06-05 03:49:08,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242778369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:08,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245706543] [2021-06-05 03:49:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:08,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:49:08,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:08,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 03:49:08,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:08,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:49:08,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:08,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 03:49:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:08,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245706543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:08,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:08,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 03:49:08,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164282721] [2021-06-05 03:49:08,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:08,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:08,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:08,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:08,317 INFO L87 Difference]: Start difference. First operand 3319 states and 12106 transitions. Second operand has 10 states, 10 states have (on average 4.2) 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) [2021-06-05 03:49:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:08,538 INFO L93 Difference]: Finished difference Result 4339 states and 15458 transitions. [2021-06-05 03:49:08,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:08,538 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) 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 24 [2021-06-05 03:49:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:08,546 INFO L225 Difference]: With dead ends: 4339 [2021-06-05 03:49:08,546 INFO L226 Difference]: Without dead ends: 4198 [2021-06-05 03:49:08,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:08,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2021-06-05 03:49:08,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 3613. [2021-06-05 03:49:08,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 3.638704318936877) internal successors, (13143), 3612 states have internal predecessors, (13143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 13143 transitions. [2021-06-05 03:49:08,619 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 13143 transitions. Word has length 24 [2021-06-05 03:49:08,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:08,619 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 13143 transitions. [2021-06-05 03:49:08,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) 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) [2021-06-05 03:49:08,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 13143 transitions. [2021-06-05 03:49:08,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:08,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:08,625 INFO L521 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] [2021-06-05 03:49:08,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 03:49:08,841 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:08,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:08,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1874823949, now seen corresponding path program 3 times [2021-06-05 03:49:08,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:08,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339566009] [2021-06-05 03:49:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:08,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:08,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339566009] [2021-06-05 03:49:08,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339566009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:08,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986801623] [2021-06-05 03:49:08,883 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 [2021-06-05 03:49:08,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 03:49:08,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:08,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:49:08,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:08,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 03:49:08,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:08,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:49:08,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:08,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 03:49:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:08,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986801623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:08,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:08,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 03:49:08,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284310691] [2021-06-05 03:49:08,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:08,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:08,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:08,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:08,997 INFO L87 Difference]: Start difference. First operand 3613 states and 13143 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:09,209 INFO L93 Difference]: Finished difference Result 4148 states and 14673 transitions. [2021-06-05 03:49:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:09,209 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 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 24 [2021-06-05 03:49:09,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:09,216 INFO L225 Difference]: With dead ends: 4148 [2021-06-05 03:49:09,216 INFO L226 Difference]: Without dead ends: 3464 [2021-06-05 03:49:09,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:09,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-06-05 03:49:09,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3015. [2021-06-05 03:49:09,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 3014 states have (on average 3.6250829462508296) internal successors, (10926), 3014 states have internal predecessors, (10926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 10926 transitions. [2021-06-05 03:49:09,296 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 10926 transitions. Word has length 24 [2021-06-05 03:49:09,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:09,296 INFO L482 AbstractCegarLoop]: Abstraction has 3015 states and 10926 transitions. [2021-06-05 03:49:09,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:09,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 10926 transitions. [2021-06-05 03:49:09,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:09,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:09,302 INFO L521 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] [2021-06-05 03:49:09,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 03:49:09,517 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:09,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:09,517 INFO L82 PathProgramCache]: Analyzing trace with hash -853710037, now seen corresponding path program 4 times [2021-06-05 03:49:09,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:09,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161353205] [2021-06-05 03:49:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:09,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:09,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161353205] [2021-06-05 03:49:09,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161353205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:09,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489584544] [2021-06-05 03:49:09,571 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 [2021-06-05 03:49:09,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:09,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:09,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:49:09,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:09,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 03:49:09,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:09,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:49:09,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:09,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 03:49:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:09,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489584544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:09,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:09,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 03:49:09,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398719369] [2021-06-05 03:49:09,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:09,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:09,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:09,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:09,679 INFO L87 Difference]: Start difference. First operand 3015 states and 10926 transitions. Second operand has 10 states, 10 states have (on average 4.0) 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) [2021-06-05 03:49:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:09,884 INFO L93 Difference]: Finished difference Result 3294 states and 11794 transitions. [2021-06-05 03:49:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:09,884 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) 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 24 [2021-06-05 03:49:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:09,890 INFO L225 Difference]: With dead ends: 3294 [2021-06-05 03:49:09,890 INFO L226 Difference]: Without dead ends: 3294 [2021-06-05 03:49:09,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:09,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2021-06-05 03:49:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 3106. [2021-06-05 03:49:09,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3106 states, 3105 states have (on average 3.61256038647343) internal successors, (11217), 3105 states have internal predecessors, (11217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 11217 transitions. [2021-06-05 03:49:09,934 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 11217 transitions. Word has length 24 [2021-06-05 03:49:09,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:09,934 INFO L482 AbstractCegarLoop]: Abstraction has 3106 states and 11217 transitions. [2021-06-05 03:49:09,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) 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) [2021-06-05 03:49:09,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 11217 transitions. [2021-06-05 03:49:09,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:09,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:09,940 INFO L521 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] [2021-06-05 03:49:10,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 03:49:10,140 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:10,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:10,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1540696521, now seen corresponding path program 5 times [2021-06-05 03:49:10,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:10,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016680901] [2021-06-05 03:49:10,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:10,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:10,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016680901] [2021-06-05 03:49:10,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016680901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:10,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553892099] [2021-06-05 03:49:10,201 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 [2021-06-05 03:49:10,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:49:10,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:10,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:49:10,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:10,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 03:49:10,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:10,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:49:10,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:10,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 03:49:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:10,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553892099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:10,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:10,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 03:49:10,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174694864] [2021-06-05 03:49:10,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:10,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:10,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:10,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:10,307 INFO L87 Difference]: Start difference. First operand 3106 states and 11217 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:10,489 INFO L93 Difference]: Finished difference Result 4306 states and 15126 transitions. [2021-06-05 03:49:10,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:10,489 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 24 [2021-06-05 03:49:10,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:10,496 INFO L225 Difference]: With dead ends: 4306 [2021-06-05 03:49:10,497 INFO L226 Difference]: Without dead ends: 4306 [2021-06-05 03:49:10,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:10,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2021-06-05 03:49:10,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 3262. [2021-06-05 03:49:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 3261 states have (on average 3.609015639374425) internal successors, (11769), 3261 states have internal predecessors, (11769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 11769 transitions. [2021-06-05 03:49:10,547 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 11769 transitions. Word has length 24 [2021-06-05 03:49:10,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:10,547 INFO L482 AbstractCegarLoop]: Abstraction has 3262 states and 11769 transitions. [2021-06-05 03:49:10,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:10,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 11769 transitions. [2021-06-05 03:49:10,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:10,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:10,553 INFO L521 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] [2021-06-05 03:49:10,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 03:49:10,753 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:10,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:10,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1089617495, now seen corresponding path program 3 times [2021-06-05 03:49:10,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:10,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193331117] [2021-06-05 03:49:10,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:10,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:10,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193331117] [2021-06-05 03:49:10,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193331117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:10,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86122446] [2021-06-05 03:49:10,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:10,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:49:10,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:10,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:49:10,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:11,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86122446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:11,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:11,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:49:11,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230869665] [2021-06-05 03:49:11,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:49:11,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:11,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:49:11,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:11,044 INFO L87 Difference]: Start difference. First operand 3262 states and 11769 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-06-05 03:49:11,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:11,336 INFO L93 Difference]: Finished difference Result 3881 states and 13726 transitions. [2021-06-05 03:49:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:11,336 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 24 [2021-06-05 03:49:11,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:11,342 INFO L225 Difference]: With dead ends: 3881 [2021-06-05 03:49:11,343 INFO L226 Difference]: Without dead ends: 3516 [2021-06-05 03:49:11,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 272.0ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:49:11,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3516 states. [2021-06-05 03:49:11,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3516 to 3289. [2021-06-05 03:49:11,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3289 states, 3288 states have (on average 3.602493917274939) internal successors, (11845), 3288 states have internal predecessors, (11845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 11845 transitions. [2021-06-05 03:49:11,389 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 11845 transitions. Word has length 24 [2021-06-05 03:49:11,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:11,389 INFO L482 AbstractCegarLoop]: Abstraction has 3289 states and 11845 transitions. [2021-06-05 03:49:11,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-06-05 03:49:11,389 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 11845 transitions. [2021-06-05 03:49:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:11,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:11,395 INFO L521 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] [2021-06-05 03:49:11,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 03:49:11,595 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:11,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:11,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2129098641, now seen corresponding path program 6 times [2021-06-05 03:49:11,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:11,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787552088] [2021-06-05 03:49:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:11,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:11,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787552088] [2021-06-05 03:49:11,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787552088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:11,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134067471] [2021-06-05 03:49:11,651 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:11,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:49:11,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:11,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:49:11,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:11,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 03:49:11,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:11,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:49:11,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:11,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 03:49:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:11,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134067471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:11,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:11,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 03:49:11,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554853205] [2021-06-05 03:49:11,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:11,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:11,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:11,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:11,759 INFO L87 Difference]: Start difference. First operand 3289 states and 11845 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-06-05 03:49:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:11,942 INFO L93 Difference]: Finished difference Result 3630 states and 12852 transitions. [2021-06-05 03:49:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:11,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 24 [2021-06-05 03:49:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:11,948 INFO L225 Difference]: With dead ends: 3630 [2021-06-05 03:49:11,949 INFO L226 Difference]: Without dead ends: 3630 [2021-06-05 03:49:11,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:11,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2021-06-05 03:49:11,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 3263. [2021-06-05 03:49:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 3.600551808706315) internal successors, (11745), 3262 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:11,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 11745 transitions. [2021-06-05 03:49:11,994 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 11745 transitions. Word has length 24 [2021-06-05 03:49:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:11,994 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 11745 transitions. [2021-06-05 03:49:11,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-06-05 03:49:11,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 11745 transitions. [2021-06-05 03:49:11,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:11,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:11,999 INFO L521 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] [2021-06-05 03:49:12,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:12,200 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:12,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:12,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1434078121, now seen corresponding path program 2 times [2021-06-05 03:49:12,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:12,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935538772] [2021-06-05 03:49:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:12,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:12,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935538772] [2021-06-05 03:49:12,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935538772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:12,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197394944] [2021-06-05 03:49:12,282 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) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:12,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:12,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:12,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:49:12,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:12,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 03:49:12,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:12,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:49:12,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:12,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 03:49:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:12,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197394944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:12,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:12,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 03:49:12,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175626825] [2021-06-05 03:49:12,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:12,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:12,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:12,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:12,378 INFO L87 Difference]: Start difference. First operand 3263 states and 11745 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:12,584 INFO L93 Difference]: Finished difference Result 3854 states and 13464 transitions. [2021-06-05 03:49:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:49:12,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 24 [2021-06-05 03:49:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:12,591 INFO L225 Difference]: With dead ends: 3854 [2021-06-05 03:49:12,591 INFO L226 Difference]: Without dead ends: 3810 [2021-06-05 03:49:12,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:12,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-06-05 03:49:12,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 3156. [2021-06-05 03:49:12,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3155 states have (on average 3.5984152139461174) internal successors, (11353), 3155 states have internal predecessors, (11353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:12,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 11353 transitions. [2021-06-05 03:49:12,638 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 11353 transitions. Word has length 24 [2021-06-05 03:49:12,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:12,638 INFO L482 AbstractCegarLoop]: Abstraction has 3156 states and 11353 transitions. [2021-06-05 03:49:12,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:12,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 11353 transitions. [2021-06-05 03:49:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:12,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:12,644 INFO L521 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] [2021-06-05 03:49:12,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 03:49:12,844 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:12,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1862582325, now seen corresponding path program 3 times [2021-06-05 03:49:12,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:12,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170334717] [2021-06-05 03:49:12,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:12,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:12,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170334717] [2021-06-05 03:49:12,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170334717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:12,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074541787] [2021-06-05 03:49:12,895 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 [2021-06-05 03:49:12,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:49:12,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:12,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:49:12,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:12,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 03:49:12,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:12,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:49:12,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:12,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 03:49:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:12,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074541787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:12,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:12,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 03:49:12,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658673368] [2021-06-05 03:49:12,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:12,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:12,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:12,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:12,989 INFO L87 Difference]: Start difference. First operand 3156 states and 11353 transitions. Second operand has 10 states, 10 states have (on average 4.2) 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) [2021-06-05 03:49:13,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:13,202 INFO L93 Difference]: Finished difference Result 3384 states and 11803 transitions. [2021-06-05 03:49:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:13,202 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) 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 24 [2021-06-05 03:49:13,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:13,208 INFO L225 Difference]: With dead ends: 3384 [2021-06-05 03:49:13,208 INFO L226 Difference]: Without dead ends: 3321 [2021-06-05 03:49:13,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:13,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-05 03:49:13,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2530. [2021-06-05 03:49:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2529 states have (on average 3.593910636615263) internal successors, (9089), 2529 states have internal predecessors, (9089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 9089 transitions. [2021-06-05 03:49:13,246 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 9089 transitions. Word has length 24 [2021-06-05 03:49:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:13,247 INFO L482 AbstractCegarLoop]: Abstraction has 2530 states and 9089 transitions. [2021-06-05 03:49:13,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) 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) [2021-06-05 03:49:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 9089 transitions. [2021-06-05 03:49:13,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:13,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:13,251 INFO L521 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] [2021-06-05 03:49:13,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:13,452 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:13,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:13,452 INFO L82 PathProgramCache]: Analyzing trace with hash 316647389, now seen corresponding path program 4 times [2021-06-05 03:49:13,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:13,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592889140] [2021-06-05 03:49:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:13,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:13,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592889140] [2021-06-05 03:49:13,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592889140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:13,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463875] [2021-06-05 03:49:13,586 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) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:13,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:13,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:13,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:49:13,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:13,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:13,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:13,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:49:13,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501834604] [2021-06-05 03:49:13,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:49:13,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:13,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:49:13,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:13,718 INFO L87 Difference]: Start difference. First operand 2530 states and 9089 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-06-05 03:49:14,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:14,093 INFO L93 Difference]: Finished difference Result 3403 states and 11831 transitions. [2021-06-05 03:49:14,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:14,094 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 24 [2021-06-05 03:49:14,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:14,098 INFO L225 Difference]: With dead ends: 3403 [2021-06-05 03:49:14,098 INFO L226 Difference]: Without dead ends: 2711 [2021-06-05 03:49:14,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:49:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-06-05 03:49:14,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2524. [2021-06-05 03:49:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 3.594926674593738) internal successors, (9070), 2523 states have internal predecessors, (9070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:14,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 9070 transitions. [2021-06-05 03:49:14,132 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 9070 transitions. Word has length 24 [2021-06-05 03:49:14,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:14,132 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 9070 transitions. [2021-06-05 03:49:14,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-06-05 03:49:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 9070 transitions. [2021-06-05 03:49:14,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:49:14,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:14,136 INFO L521 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] [2021-06-05 03:49:14,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 03:49:14,352 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:14,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:14,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2118036169, now seen corresponding path program 5 times [2021-06-05 03:49:14,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:14,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567025509] [2021-06-05 03:49:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:14,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:14,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567025509] [2021-06-05 03:49:14,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567025509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:14,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822818906] [2021-06-05 03:49:14,462 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) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:14,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:14,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:14,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:49:14,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:14,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822818906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:14,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:14,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:49:14,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679061070] [2021-06-05 03:49:14,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:49:14,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:14,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:49:14,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:14,655 INFO L87 Difference]: Start difference. First operand 2524 states and 9070 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-06-05 03:49:15,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:15,067 INFO L93 Difference]: Finished difference Result 3698 states and 12705 transitions. [2021-06-05 03:49:15,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:49:15,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 24 [2021-06-05 03:49:15,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:15,072 INFO L225 Difference]: With dead ends: 3698 [2021-06-05 03:49:15,072 INFO L226 Difference]: Without dead ends: 2495 [2021-06-05 03:49:15,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 294.3ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:49:15,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-06-05 03:49:15,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2347. [2021-06-05 03:49:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 3.6027280477408357) internal successors, (8452), 2346 states have internal predecessors, (8452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:15,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 8452 transitions. [2021-06-05 03:49:15,102 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 8452 transitions. Word has length 24 [2021-06-05 03:49:15,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:15,102 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 8452 transitions. [2021-06-05 03:49:15,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-06-05 03:49:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 8452 transitions. [2021-06-05 03:49:15,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:49:15,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:15,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:15,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:15,306 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:15,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:15,306 INFO L82 PathProgramCache]: Analyzing trace with hash -579383647, now seen corresponding path program 4 times [2021-06-05 03:49:15,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:15,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552395016] [2021-06-05 03:49:15,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:15,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:15,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552395016] [2021-06-05 03:49:15,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552395016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:15,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878563] [2021-06-05 03:49:15,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:15,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:15,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:15,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:49:15,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:15,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:15,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:15,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 03:49:15,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020201073] [2021-06-05 03:49:15,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:15,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:15,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:15,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:15,453 INFO L87 Difference]: Start difference. First operand 2347 states and 8452 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:15,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:15,655 INFO L93 Difference]: Finished difference Result 7003 states and 24374 transitions. [2021-06-05 03:49:15,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:15,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 03:49:15,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:15,667 INFO L225 Difference]: With dead ends: 7003 [2021-06-05 03:49:15,667 INFO L226 Difference]: Without dead ends: 6243 [2021-06-05 03:49:15,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:49:15,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6243 states. [2021-06-05 03:49:15,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6243 to 3941. [2021-06-05 03:49:15,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3940 states have (on average 3.7758883248730966) internal successors, (14877), 3940 states have internal predecessors, (14877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:15,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 14877 transitions. [2021-06-05 03:49:15,778 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 14877 transitions. Word has length 27 [2021-06-05 03:49:15,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:15,778 INFO L482 AbstractCegarLoop]: Abstraction has 3941 states and 14877 transitions. [2021-06-05 03:49:15,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:15,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 14877 transitions. [2021-06-05 03:49:15,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:49:15,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:15,785 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:16,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 03:49:16,001 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:16,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:16,001 INFO L82 PathProgramCache]: Analyzing trace with hash 755204605, now seen corresponding path program 1 times [2021-06-05 03:49:16,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:16,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764916341] [2021-06-05 03:49:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:16,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:16,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764916341] [2021-06-05 03:49:16,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764916341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:16,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540839649] [2021-06-05 03:49:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-06-05 03:49:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:16,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:49:16,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:16,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 03:49:16,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:16,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:49:16,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:16,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 03:49:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:16,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540839649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:16,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:16,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 03:49:16,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136056885] [2021-06-05 03:49:16,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:16,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:16,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:16,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:16,141 INFO L87 Difference]: Start difference. First operand 3941 states and 14877 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:16,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:16,315 INFO L93 Difference]: Finished difference Result 5052 states and 18543 transitions. [2021-06-05 03:49:16,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:16,315 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 27 [2021-06-05 03:49:16,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:16,324 INFO L225 Difference]: With dead ends: 5052 [2021-06-05 03:49:16,325 INFO L226 Difference]: Without dead ends: 4862 [2021-06-05 03:49:16,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:16,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-06-05 03:49:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 4231. [2021-06-05 03:49:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 3.753900709219858) internal successors, (15879), 4230 states have internal predecessors, (15879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:16,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 15879 transitions. [2021-06-05 03:49:16,391 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 15879 transitions. Word has length 27 [2021-06-05 03:49:16,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:16,391 INFO L482 AbstractCegarLoop]: Abstraction has 4231 states and 15879 transitions. [2021-06-05 03:49:16,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:16,392 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 15879 transitions. [2021-06-05 03:49:16,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:49:16,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:16,398 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:16,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:16,615 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:16,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:16,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1627375381, now seen corresponding path program 5 times [2021-06-05 03:49:16,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:16,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453057774] [2021-06-05 03:49:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:16,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:16,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453057774] [2021-06-05 03:49:16,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453057774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:16,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948849351] [2021-06-05 03:49:16,645 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:16,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:49:16,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:16,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:49:16,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:16,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948849351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:16,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:16,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 03:49:16,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157341327] [2021-06-05 03:49:16,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:16,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:16,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:16,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:16,732 INFO L87 Difference]: Start difference. First operand 4231 states and 15879 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:16,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:16,858 INFO L93 Difference]: Finished difference Result 6079 states and 21441 transitions. [2021-06-05 03:49:16,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:16,859 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 27 [2021-06-05 03:49:16,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:16,868 INFO L225 Difference]: With dead ends: 6079 [2021-06-05 03:49:16,868 INFO L226 Difference]: Without dead ends: 5466 [2021-06-05 03:49:16,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5466 states. [2021-06-05 03:49:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5466 to 4109. [2021-06-05 03:49:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4109 states, 4108 states have (on average 3.7458617332035056) internal successors, (15388), 4108 states have internal predecessors, (15388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:16,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 15388 transitions. [2021-06-05 03:49:16,936 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 15388 transitions. Word has length 27 [2021-06-05 03:49:16,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:16,936 INFO L482 AbstractCegarLoop]: Abstraction has 4109 states and 15388 transitions. [2021-06-05 03:49:16,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:16,936 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 15388 transitions. [2021-06-05 03:49:16,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:49:16,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:16,942 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:17,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 03:49:17,143 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:17,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:17,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1329916833, now seen corresponding path program 6 times [2021-06-05 03:49:17,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:17,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743153450] [2021-06-05 03:49:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:17,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:17,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743153450] [2021-06-05 03:49:17,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743153450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:17,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319722530] [2021-06-05 03:49:17,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:17,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 03:49:17,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:17,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:49:17,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:17,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319722530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:17,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:17,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 03:49:17,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442209631] [2021-06-05 03:49:17,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:49:17,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:17,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:49:17,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:49:17,239 INFO L87 Difference]: Start difference. First operand 4109 states and 15388 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:17,358 INFO L93 Difference]: Finished difference Result 8656 states and 31846 transitions. [2021-06-05 03:49:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 03:49:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:17,375 INFO L225 Difference]: With dead ends: 8656 [2021-06-05 03:49:17,375 INFO L226 Difference]: Without dead ends: 8340 [2021-06-05 03:49:17,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:17,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8340 states. [2021-06-05 03:49:17,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8340 to 5370. [2021-06-05 03:49:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5370 states, 5369 states have (on average 3.8379586515179738) internal successors, (20606), 5369 states have internal predecessors, (20606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:17,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 20606 transitions. [2021-06-05 03:49:17,524 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 20606 transitions. Word has length 27 [2021-06-05 03:49:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:17,524 INFO L482 AbstractCegarLoop]: Abstraction has 5370 states and 20606 transitions. [2021-06-05 03:49:17,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 20606 transitions. [2021-06-05 03:49:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:49:17,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:17,533 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:17,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:17,734 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:17,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:17,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1648096775, now seen corresponding path program 7 times [2021-06-05 03:49:17,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:17,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824650441] [2021-06-05 03:49:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:17,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:17,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824650441] [2021-06-05 03:49:17,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824650441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:17,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605289854] [2021-06-05 03:49:17,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:17,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:49:17,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:17,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605289854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:17,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:17,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-06-05 03:49:17,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256270820] [2021-06-05 03:49:17,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:49:17,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:17,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:49:17,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:49:17,859 INFO L87 Difference]: Start difference. First operand 5370 states and 20606 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-06-05 03:49:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:17,955 INFO L93 Difference]: Finished difference Result 8619 states and 31580 transitions. [2021-06-05 03:49:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:49:17,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 27 [2021-06-05 03:49:17,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:17,971 INFO L225 Difference]: With dead ends: 8619 [2021-06-05 03:49:17,971 INFO L226 Difference]: Without dead ends: 8251 [2021-06-05 03:49:17,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:17,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-06-05 03:49:18,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 5352. [2021-06-05 03:49:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 3.834984115118669) internal successors, (20521), 5351 states have internal predecessors, (20521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 20521 transitions. [2021-06-05 03:49:18,067 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 20521 transitions. Word has length 27 [2021-06-05 03:49:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:18,068 INFO L482 AbstractCegarLoop]: Abstraction has 5352 states and 20521 transitions. [2021-06-05 03:49:18,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-06-05 03:49:18,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 20521 transitions. [2021-06-05 03:49:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:49:18,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:18,076 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:18,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 03:49:18,277 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:18,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:18,277 INFO L82 PathProgramCache]: Analyzing trace with hash 888507809, now seen corresponding path program 8 times [2021-06-05 03:49:18,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:18,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978824669] [2021-06-05 03:49:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:18,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:18,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978824669] [2021-06-05 03:49:18,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978824669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:18,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266324776] [2021-06-05 03:49:18,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:18,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:18,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:18,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:49:18,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:18,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266324776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:18,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:18,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 03:49:18,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314299055] [2021-06-05 03:49:18,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:18,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:18,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:18,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:18,403 INFO L87 Difference]: Start difference. First operand 5352 states and 20521 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:18,539 INFO L93 Difference]: Finished difference Result 8299 states and 30586 transitions. [2021-06-05 03:49:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:49:18,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 27 [2021-06-05 03:49:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:18,556 INFO L225 Difference]: With dead ends: 8299 [2021-06-05 03:49:18,556 INFO L226 Difference]: Without dead ends: 7871 [2021-06-05 03:49:18,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:18,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-06-05 03:49:18,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 5590. [2021-06-05 03:49:18,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5590 states, 5589 states have (on average 3.8017534442655214) internal successors, (21248), 5589 states have internal predecessors, (21248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:18,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5590 states to 5590 states and 21248 transitions. [2021-06-05 03:49:18,653 INFO L78 Accepts]: Start accepts. Automaton has 5590 states and 21248 transitions. Word has length 27 [2021-06-05 03:49:18,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:18,653 INFO L482 AbstractCegarLoop]: Abstraction has 5590 states and 21248 transitions. [2021-06-05 03:49:18,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:18,653 INFO L276 IsEmpty]: Start isEmpty. Operand 5590 states and 21248 transitions. [2021-06-05 03:49:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:49:18,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:18,662 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:18,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 03:49:18,862 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:18,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:18,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1554761067, now seen corresponding path program 2 times [2021-06-05 03:49:18,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:18,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714850752] [2021-06-05 03:49:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:18,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:18,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714850752] [2021-06-05 03:49:18,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714850752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:18,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748343364] [2021-06-05 03:49:18,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:18,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:18,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:18,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:49:18,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:18,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 03:49:18,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:18,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:49:18,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:18,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 03:49:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:18,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748343364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:18,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:18,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 03:49:18,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307721160] [2021-06-05 03:49:18,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:18,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:18,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:18,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:18,996 INFO L87 Difference]: Start difference. First operand 5590 states and 21248 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:19,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:19,157 INFO L93 Difference]: Finished difference Result 5588 states and 20704 transitions. [2021-06-05 03:49:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:49:19,157 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 [2021-06-05 03:49:19,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:19,166 INFO L225 Difference]: With dead ends: 5588 [2021-06-05 03:49:19,166 INFO L226 Difference]: Without dead ends: 5117 [2021-06-05 03:49:19,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:19,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-06-05 03:49:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4893. [2021-06-05 03:49:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 4892 states have (on average 3.8068274734260017) internal successors, (18623), 4892 states have internal predecessors, (18623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 18623 transitions. [2021-06-05 03:49:19,238 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 18623 transitions. Word has length 27 [2021-06-05 03:49:19,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:19,238 INFO L482 AbstractCegarLoop]: Abstraction has 4893 states and 18623 transitions. [2021-06-05 03:49:19,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:19,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 18623 transitions. [2021-06-05 03:49:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:49:19,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:19,246 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:19,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 03:49:19,461 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:19,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:19,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1455495413, now seen corresponding path program 3 times [2021-06-05 03:49:19,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:19,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459559557] [2021-06-05 03:49:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:19,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:19,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459559557] [2021-06-05 03:49:19,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459559557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:19,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300688176] [2021-06-05 03:49:19,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:19,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:49:19,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:19,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:49:19,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:19,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 03:49:19,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:19,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:49:19,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:19,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 03:49:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:19,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300688176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:19,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:19,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 03:49:19,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324153043] [2021-06-05 03:49:19,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:19,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:19,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:19,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:19,670 INFO L87 Difference]: Start difference. First operand 4893 states and 18623 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:19,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:19,859 INFO L93 Difference]: Finished difference Result 5208 states and 19682 transitions. [2021-06-05 03:49:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:19,859 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 27 [2021-06-05 03:49:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:19,869 INFO L225 Difference]: With dead ends: 5208 [2021-06-05 03:49:19,869 INFO L226 Difference]: Without dead ends: 5208 [2021-06-05 03:49:19,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5208 states. [2021-06-05 03:49:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5208 to 4755. [2021-06-05 03:49:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4755 states, 4754 states have (on average 3.8029028186790073) internal successors, (18079), 4754 states have internal predecessors, (18079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:19,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4755 states to 4755 states and 18079 transitions. [2021-06-05 03:49:19,938 INFO L78 Accepts]: Start accepts. Automaton has 4755 states and 18079 transitions. Word has length 27 [2021-06-05 03:49:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:19,938 INFO L482 AbstractCegarLoop]: Abstraction has 4755 states and 18079 transitions. [2021-06-05 03:49:19,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:19,938 INFO L276 IsEmpty]: Start isEmpty. Operand 4755 states and 18079 transitions. [2021-06-05 03:49:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:49:19,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:19,946 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:20,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 03:49:20,158 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:20,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:20,159 INFO L82 PathProgramCache]: Analyzing trace with hash 733903001, now seen corresponding path program 4 times [2021-06-05 03:49:20,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:20,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435439208] [2021-06-05 03:49:20,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:20,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:20,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435439208] [2021-06-05 03:49:20,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435439208] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:49:20,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:49:20,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:49:20,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85829873] [2021-06-05 03:49:20,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:49:20,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:20,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:49:20,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:49:20,251 INFO L87 Difference]: Start difference. First operand 4755 states and 18079 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:20,330 INFO L93 Difference]: Finished difference Result 4613 states and 17475 transitions. [2021-06-05 03:49:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:49:20,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 03:49:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:20,339 INFO L225 Difference]: With dead ends: 4613 [2021-06-05 03:49:20,339 INFO L226 Difference]: Without dead ends: 4453 [2021-06-05 03:49:20,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:49:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4453 states. [2021-06-05 03:49:20,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4453 to 4453. [2021-06-05 03:49:20,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 3.8313117699910153) internal successors, (17057), 4452 states have internal predecessors, (17057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:20,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 17057 transitions. [2021-06-05 03:49:20,399 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 17057 transitions. Word has length 27 [2021-06-05 03:49:20,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:20,400 INFO L482 AbstractCegarLoop]: Abstraction has 4453 states and 17057 transitions. [2021-06-05 03:49:20,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:20,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 17057 transitions. [2021-06-05 03:49:20,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:49:20,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:20,407 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:20,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-05 03:49:20,407 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:20,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:20,407 INFO L82 PathProgramCache]: Analyzing trace with hash -393228176, now seen corresponding path program 9 times [2021-06-05 03:49:20,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:20,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716078117] [2021-06-05 03:49:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:20,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:20,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716078117] [2021-06-05 03:49:20,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716078117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:20,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853395694] [2021-06-05 03:49:20,466 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:20,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:49:20,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:20,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:49:20,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:20,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853395694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:20,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:20,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:49:20,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359515407] [2021-06-05 03:49:20,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:49:20,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:20,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:49:20,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:49:20,653 INFO L87 Difference]: Start difference. First operand 4453 states and 17057 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:21,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:21,747 INFO L93 Difference]: Finished difference Result 18250 states and 67488 transitions. [2021-06-05 03:49:21,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 03:49:21,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 30 [2021-06-05 03:49:21,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:21,784 INFO L225 Difference]: With dead ends: 18250 [2021-06-05 03:49:21,784 INFO L226 Difference]: Without dead ends: 17714 [2021-06-05 03:49:21,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 541.9ms TimeCoverageRelationStatistics Valid=373, Invalid=1433, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:49:21,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17714 states. [2021-06-05 03:49:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17714 to 11055. [2021-06-05 03:49:22,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11055 states, 11054 states have (on average 4.028586936855437) internal successors, (44532), 11054 states have internal predecessors, (44532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:22,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11055 states to 11055 states and 44532 transitions. [2021-06-05 03:49:22,106 INFO L78 Accepts]: Start accepts. Automaton has 11055 states and 44532 transitions. Word has length 30 [2021-06-05 03:49:22,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:22,106 INFO L482 AbstractCegarLoop]: Abstraction has 11055 states and 44532 transitions. [2021-06-05 03:49:22,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:22,106 INFO L276 IsEmpty]: Start isEmpty. Operand 11055 states and 44532 transitions. [2021-06-05 03:49:22,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:49:22,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:22,126 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:22,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:22,326 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:22,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:22,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1496580308, now seen corresponding path program 10 times [2021-06-05 03:49:22,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:22,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999653867] [2021-06-05 03:49:22,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:22,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:22,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999653867] [2021-06-05 03:49:22,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999653867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:22,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386049243] [2021-06-05 03:49:22,411 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:22,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:22,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:22,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:49:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:22,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 03:49:22,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:22,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:49:22,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:22,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 03:49:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:22,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386049243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:22,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:22,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:49:22,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70025341] [2021-06-05 03:49:22,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:49:22,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:22,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:49:22,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:49:22,611 INFO L87 Difference]: Start difference. First operand 11055 states and 44532 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:24,252 INFO L93 Difference]: Finished difference Result 23408 states and 90037 transitions. [2021-06-05 03:49:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 03:49:24,252 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:49:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:24,304 INFO L225 Difference]: With dead ends: 23408 [2021-06-05 03:49:24,304 INFO L226 Difference]: Without dead ends: 22853 [2021-06-05 03:49:24,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 795.6ms TimeCoverageRelationStatistics Valid=393, Invalid=1959, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 03:49:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22853 states. [2021-06-05 03:49:24,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22853 to 15842. [2021-06-05 03:49:24,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15842 states, 15841 states have (on average 4.061738526608169) internal successors, (64342), 15841 states have internal predecessors, (64342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15842 states to 15842 states and 64342 transitions. [2021-06-05 03:49:24,658 INFO L78 Accepts]: Start accepts. Automaton has 15842 states and 64342 transitions. Word has length 30 [2021-06-05 03:49:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:24,658 INFO L482 AbstractCegarLoop]: Abstraction has 15842 states and 64342 transitions. [2021-06-05 03:49:24,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 15842 states and 64342 transitions. [2021-06-05 03:49:24,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:49:24,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:24,688 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:24,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 03:49:24,893 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:24,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:24,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1834270364, now seen corresponding path program 11 times [2021-06-05 03:49:24,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:24,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946989929] [2021-06-05 03:49:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:24,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:24,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946989929] [2021-06-05 03:49:24,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946989929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:24,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374462342] [2021-06-05 03:49:24,937 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:49:24,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:49:24,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:24,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:49:24,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:25,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374462342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:25,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:25,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-06-05 03:49:25,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686486691] [2021-06-05 03:49:25,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:49:25,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:25,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:49:25,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:25,029 INFO L87 Difference]: Start difference. First operand 15842 states and 64342 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:25,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:25,424 INFO L93 Difference]: Finished difference Result 23804 states and 95370 transitions. [2021-06-05 03:49:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:25,424 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 30 [2021-06-05 03:49:25,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:25,562 INFO L225 Difference]: With dead ends: 23804 [2021-06-05 03:49:25,562 INFO L226 Difference]: Without dead ends: 23752 [2021-06-05 03:49:25,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:49:25,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23752 states. [2021-06-05 03:49:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23752 to 16213. [2021-06-05 03:49:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16213 states, 16212 states have (on average 4.060880829015544) internal successors, (65835), 16212 states have internal predecessors, (65835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16213 states to 16213 states and 65835 transitions. [2021-06-05 03:49:25,999 INFO L78 Accepts]: Start accepts. Automaton has 16213 states and 65835 transitions. Word has length 30 [2021-06-05 03:49:25,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:25,999 INFO L482 AbstractCegarLoop]: Abstraction has 16213 states and 65835 transitions. [2021-06-05 03:49:25,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 16213 states and 65835 transitions. [2021-06-05 03:49:26,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:49:26,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:26,079 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:26,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 03:49:26,293 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1212389954, now seen corresponding path program 12 times [2021-06-05 03:49:26,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:26,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679024728] [2021-06-05 03:49:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:26,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:26,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679024728] [2021-06-05 03:49:26,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679024728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:26,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843554689] [2021-06-05 03:49:26,346 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:26,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:49:26,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:26,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:49:26,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:49:26,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843554689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:26,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:26,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 03:49:26,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508127016] [2021-06-05 03:49:26,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:49:26,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:26,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:49:26,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:26,491 INFO L87 Difference]: Start difference. First operand 16213 states and 65835 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:27,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:27,034 INFO L93 Difference]: Finished difference Result 31221 states and 123338 transitions. [2021-06-05 03:49:27,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:49:27,035 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:49:27,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:27,181 INFO L225 Difference]: With dead ends: 31221 [2021-06-05 03:49:27,182 INFO L226 Difference]: Without dead ends: 30782 [2021-06-05 03:49:27,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:49:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30782 states. [2021-06-05 03:49:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30782 to 23744. [2021-06-05 03:49:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23744 states, 23743 states have (on average 4.117634671271532) internal successors, (97765), 23743 states have internal predecessors, (97765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23744 states to 23744 states and 97765 transitions. [2021-06-05 03:49:27,839 INFO L78 Accepts]: Start accepts. Automaton has 23744 states and 97765 transitions. Word has length 30 [2021-06-05 03:49:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:27,839 INFO L482 AbstractCegarLoop]: Abstraction has 23744 states and 97765 transitions. [2021-06-05 03:49:27,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 23744 states and 97765 transitions. [2021-06-05 03:49:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:49:27,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:27,879 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:28,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:28,079 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:28,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:28,080 INFO L82 PathProgramCache]: Analyzing trace with hash -977561994, now seen corresponding path program 13 times [2021-06-05 03:49:28,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:28,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891238104] [2021-06-05 03:49:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:28,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:28,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891238104] [2021-06-05 03:49:28,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891238104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:28,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725448132] [2021-06-05 03:49:28,202 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:28,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:49:28,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:28,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 03:49:28,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:28,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:49:28,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:28,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 03:49:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:28,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725448132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:28,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:28,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:49:28,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670363396] [2021-06-05 03:49:28,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:49:28,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:28,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:49:28,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:49:28,371 INFO L87 Difference]: Start difference. First operand 23744 states and 97765 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:29,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:29,512 INFO L93 Difference]: Finished difference Result 35138 states and 142210 transitions. [2021-06-05 03:49:29,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:49:29,512 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:49:29,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:29,607 INFO L225 Difference]: With dead ends: 35138 [2021-06-05 03:49:29,607 INFO L226 Difference]: Without dead ends: 34623 [2021-06-05 03:49:29,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 453.2ms TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:49:29,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34623 states. [2021-06-05 03:49:30,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34623 to 25637. [2021-06-05 03:49:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25637 states, 25636 states have (on average 4.109065376813856) internal successors, (105340), 25636 states have internal predecessors, (105340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25637 states to 25637 states and 105340 transitions. [2021-06-05 03:49:30,301 INFO L78 Accepts]: Start accepts. Automaton has 25637 states and 105340 transitions. Word has length 30 [2021-06-05 03:49:30,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:30,301 INFO L482 AbstractCegarLoop]: Abstraction has 25637 states and 105340 transitions. [2021-06-05 03:49:30,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:30,301 INFO L276 IsEmpty]: Start isEmpty. Operand 25637 states and 105340 transitions. [2021-06-05 03:49:30,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:49:30,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:30,345 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:30,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 03:49:30,545 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:30,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:30,546 INFO L82 PathProgramCache]: Analyzing trace with hash 986277488, now seen corresponding path program 14 times [2021-06-05 03:49:30,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:30,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417122348] [2021-06-05 03:49:30,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:30,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:30,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417122348] [2021-06-05 03:49:30,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417122348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:30,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102195310] [2021-06-05 03:49:30,606 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:30,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:30,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:30,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:49:30,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:30,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102195310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:30,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:30,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 03:49:30,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241201032] [2021-06-05 03:49:30,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:49:30,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:30,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:49:30,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:30,716 INFO L87 Difference]: Start difference. First operand 25637 states and 105340 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:31,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:31,631 INFO L93 Difference]: Finished difference Result 51004 states and 204742 transitions. [2021-06-05 03:49:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:49:31,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 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 30 [2021-06-05 03:49:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:31,789 INFO L225 Difference]: With dead ends: 51004 [2021-06-05 03:49:31,790 INFO L226 Difference]: Without dead ends: 50772 [2021-06-05 03:49:31,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 198.9ms TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:49:31,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50772 states. [2021-06-05 03:49:32,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50772 to 38308. [2021-06-05 03:49:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38308 states, 38307 states have (on average 4.208395332445767) internal successors, (161211), 38307 states have internal predecessors, (161211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:33,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38308 states to 38308 states and 161211 transitions. [2021-06-05 03:49:33,102 INFO L78 Accepts]: Start accepts. Automaton has 38308 states and 161211 transitions. Word has length 30 [2021-06-05 03:49:33,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:33,102 INFO L482 AbstractCegarLoop]: Abstraction has 38308 states and 161211 transitions. [2021-06-05 03:49:33,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:33,102 INFO L276 IsEmpty]: Start isEmpty. Operand 38308 states and 161211 transitions. [2021-06-05 03:49:33,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:49:33,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:33,165 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:33,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:33,366 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:33,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:33,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1130060142, now seen corresponding path program 15 times [2021-06-05 03:49:33,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:33,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94874523] [2021-06-05 03:49:33,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:33,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:33,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94874523] [2021-06-05 03:49:33,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94874523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:33,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660970516] [2021-06-05 03:49:33,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:33,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:49:33,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:33,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:49:33,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:33,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660970516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:33,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:33,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-06-05 03:49:33,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785218897] [2021-06-05 03:49:33,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:49:33,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:33,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:49:33,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:33,588 INFO L87 Difference]: Start difference. First operand 38308 states and 161211 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:34,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:34,322 INFO L93 Difference]: Finished difference Result 45696 states and 184859 transitions. [2021-06-05 03:49:34,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:49:34,322 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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 30 [2021-06-05 03:49:34,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:34,459 INFO L225 Difference]: With dead ends: 45696 [2021-06-05 03:49:34,460 INFO L226 Difference]: Without dead ends: 45550 [2021-06-05 03:49:34,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:49:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45550 states. [2021-06-05 03:49:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45550 to 38454. [2021-06-05 03:49:35,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38454 states, 38453 states have (on average 4.205341585832055) internal successors, (161708), 38453 states have internal predecessors, (161708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:35,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38454 states to 38454 states and 161708 transitions. [2021-06-05 03:49:35,692 INFO L78 Accepts]: Start accepts. Automaton has 38454 states and 161708 transitions. Word has length 30 [2021-06-05 03:49:35,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:35,692 INFO L482 AbstractCegarLoop]: Abstraction has 38454 states and 161708 transitions. [2021-06-05 03:49:35,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:35,693 INFO L276 IsEmpty]: Start isEmpty. Operand 38454 states and 161708 transitions. [2021-06-05 03:49:35,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:49:35,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:35,753 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:35,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 03:49:35,954 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:35,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1343876520, now seen corresponding path program 16 times [2021-06-05 03:49:35,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:35,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934733636] [2021-06-05 03:49:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:35,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:35,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934733636] [2021-06-05 03:49:35,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934733636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:35,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721441840] [2021-06-05 03:49:35,986 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:36,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:36,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:36,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:49:36,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:36,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 03:49:36,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:36,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:49:36,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:36,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 03:49:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:36,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721441840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:36,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:36,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 03:49:36,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52110379] [2021-06-05 03:49:36,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:49:36,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:36,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:49:36,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:36,135 INFO L87 Difference]: Start difference. First operand 38454 states and 161708 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:36,809 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-06-05 03:49:37,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:37,770 INFO L93 Difference]: Finished difference Result 55267 states and 223349 transitions. [2021-06-05 03:49:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 03:49:37,771 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:49:37,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:38,099 INFO L225 Difference]: With dead ends: 55267 [2021-06-05 03:49:38,099 INFO L226 Difference]: Without dead ends: 54596 [2021-06-05 03:49:38,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 711.5ms TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 03:49:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54596 states. [2021-06-05 03:49:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54596 to 41454. [2021-06-05 03:49:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41454 states, 41453 states have (on average 4.203965937326611) internal successors, (174267), 41453 states have internal predecessors, (174267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41454 states to 41454 states and 174267 transitions. [2021-06-05 03:49:39,315 INFO L78 Accepts]: Start accepts. Automaton has 41454 states and 174267 transitions. Word has length 30 [2021-06-05 03:49:39,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:39,315 INFO L482 AbstractCegarLoop]: Abstraction has 41454 states and 174267 transitions. [2021-06-05 03:49:39,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:39,315 INFO L276 IsEmpty]: Start isEmpty. Operand 41454 states and 174267 transitions. [2021-06-05 03:49:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:49:39,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:39,379 INFO L521 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, 1] [2021-06-05 03:49:39,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 03:49:39,580 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:39,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1709456920, now seen corresponding path program 1 times [2021-06-05 03:49:39,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:39,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436624986] [2021-06-05 03:49:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:39,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:39,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436624986] [2021-06-05 03:49:39,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436624986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:39,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414633744] [2021-06-05 03:49:39,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:39,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:49:39,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:39,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414633744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:39,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:39,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 03:49:39,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303450472] [2021-06-05 03:49:39,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:49:39,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:39,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:49:39,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:39,769 INFO L87 Difference]: Start difference. First operand 41454 states and 174267 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:40,252 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-06-05 03:49:41,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:41,759 INFO L93 Difference]: Finished difference Result 56968 states and 227845 transitions. [2021-06-05 03:49:41,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 03:49:41,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:49:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:41,920 INFO L225 Difference]: With dead ends: 56968 [2021-06-05 03:49:41,920 INFO L226 Difference]: Without dead ends: 56506 [2021-06-05 03:49:41,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 877.2ms TimeCoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 03:49:41,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56506 states. [2021-06-05 03:49:42,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56506 to 42332. [2021-06-05 03:49:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42332 states, 42331 states have (on average 4.198270770829888) internal successors, (177717), 42331 states have internal predecessors, (177717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:43,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42332 states to 42332 states and 177717 transitions. [2021-06-05 03:49:43,208 INFO L78 Accepts]: Start accepts. Automaton has 42332 states and 177717 transitions. Word has length 30 [2021-06-05 03:49:43,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:43,208 INFO L482 AbstractCegarLoop]: Abstraction has 42332 states and 177717 transitions. [2021-06-05 03:49:43,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:43,208 INFO L276 IsEmpty]: Start isEmpty. Operand 42332 states and 177717 transitions. [2021-06-05 03:49:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:49:43,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:43,283 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:43,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 03:49:43,484 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:43,484 INFO L82 PathProgramCache]: Analyzing trace with hash 541122106, now seen corresponding path program 17 times [2021-06-05 03:49:43,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:43,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702352703] [2021-06-05 03:49:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:43,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:43,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702352703] [2021-06-05 03:49:43,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702352703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:43,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496181601] [2021-06-05 03:49:43,523 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:43,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:49:43,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:43,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:49:43,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:43,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496181601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:43,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:43,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 9 [2021-06-05 03:49:43,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293854360] [2021-06-05 03:49:43,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:43,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:43,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:43,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:43,627 INFO L87 Difference]: Start difference. First operand 42332 states and 177717 transitions. Second operand has 10 states, 10 states have (on average 4.1) 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) [2021-06-05 03:49:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:44,472 INFO L93 Difference]: Finished difference Result 52680 states and 212917 transitions. [2021-06-05 03:49:44,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:49:44,473 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) 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 30 [2021-06-05 03:49:44,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:44,629 INFO L225 Difference]: With dead ends: 52680 [2021-06-05 03:49:44,629 INFO L226 Difference]: Without dead ends: 52640 [2021-06-05 03:49:44,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:49:44,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52640 states. [2021-06-05 03:49:45,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52640 to 42878. [2021-06-05 03:49:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42878 states, 42877 states have (on average 4.208503393427712) internal successors, (180448), 42877 states have internal predecessors, (180448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:46,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42878 states to 42878 states and 180448 transitions. [2021-06-05 03:49:46,088 INFO L78 Accepts]: Start accepts. Automaton has 42878 states and 180448 transitions. Word has length 30 [2021-06-05 03:49:46,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:46,088 INFO L482 AbstractCegarLoop]: Abstraction has 42878 states and 180448 transitions. [2021-06-05 03:49:46,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) 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) [2021-06-05 03:49:46,088 INFO L276 IsEmpty]: Start isEmpty. Operand 42878 states and 180448 transitions. [2021-06-05 03:49:46,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:49:46,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:46,176 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:46,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 03:49:46,378 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:46,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:46,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1494154336, now seen corresponding path program 18 times [2021-06-05 03:49:46,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:46,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317877525] [2021-06-05 03:49:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:46,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:46,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317877525] [2021-06-05 03:49:46,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317877525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:46,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175750386] [2021-06-05 03:49:46,410 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:46,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:49:46,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:46,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:49:46,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:46,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175750386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:46,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:46,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 03:49:46,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105887362] [2021-06-05 03:49:46,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:49:46,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:46,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:49:46,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:46,548 INFO L87 Difference]: Start difference. First operand 42878 states and 180448 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:47,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:47,785 INFO L93 Difference]: Finished difference Result 93945 states and 386209 transitions. [2021-06-05 03:49:47,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:49:47,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:49:47,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:48,091 INFO L225 Difference]: With dead ends: 93945 [2021-06-05 03:49:48,092 INFO L226 Difference]: Without dead ends: 92826 [2021-06-05 03:49:48,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 273.8ms TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:49:48,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92826 states. [2021-06-05 03:49:50,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92826 to 70922. [2021-06-05 03:49:50,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70922 states, 70921 states have (on average 4.303647720703318) internal successors, (305219), 70921 states have internal predecessors, (305219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70922 states to 70922 states and 305219 transitions. [2021-06-05 03:49:50,544 INFO L78 Accepts]: Start accepts. Automaton has 70922 states and 305219 transitions. Word has length 30 [2021-06-05 03:49:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:50,544 INFO L482 AbstractCegarLoop]: Abstraction has 70922 states and 305219 transitions. [2021-06-05 03:49:50,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 70922 states and 305219 transitions. [2021-06-05 03:49:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:49:50,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:50,635 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:50,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:50,835 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:50,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:50,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1262024518, now seen corresponding path program 19 times [2021-06-05 03:49:50,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:50,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113933815] [2021-06-05 03:49:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:50,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:50,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113933815] [2021-06-05 03:49:50,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113933815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:50,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911849350] [2021-06-05 03:49:50,880 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:50,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:49:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:50,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 03:49:50,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:51,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:49:51,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:51,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 03:49:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:51,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911849350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:51,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:51,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:49:51,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470904298] [2021-06-05 03:49:51,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:49:51,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:51,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:49:51,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:49:51,021 INFO L87 Difference]: Start difference. First operand 70922 states and 305219 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:53,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:53,500 INFO L93 Difference]: Finished difference Result 91994 states and 383695 transitions. [2021-06-05 03:49:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 03:49:53,501 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:49:53,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:53,818 INFO L225 Difference]: With dead ends: 91994 [2021-06-05 03:49:53,819 INFO L226 Difference]: Without dead ends: 91128 [2021-06-05 03:49:53,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 763.5ms TimeCoverageRelationStatistics Valid=406, Invalid=2044, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 03:49:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91128 states. [2021-06-05 03:49:55,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91128 to 75370. [2021-06-05 03:49:56,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75370 states, 75369 states have (on average 4.307619843702318) internal successors, (324661), 75369 states have internal predecessors, (324661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:56,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75370 states to 75370 states and 324661 transitions. [2021-06-05 03:49:56,361 INFO L78 Accepts]: Start accepts. Automaton has 75370 states and 324661 transitions. Word has length 30 [2021-06-05 03:49:56,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:56,361 INFO L482 AbstractCegarLoop]: Abstraction has 75370 states and 324661 transitions. [2021-06-05 03:49:56,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:56,362 INFO L276 IsEmpty]: Start isEmpty. Operand 75370 states and 324661 transitions. [2021-06-05 03:49:56,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:49:56,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:56,465 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:56,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 03:49:56,666 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:56,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:56,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1475840896, now seen corresponding path program 20 times [2021-06-05 03:49:56,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:56,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593360669] [2021-06-05 03:49:56,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:56,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:56,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593360669] [2021-06-05 03:49:56,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593360669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:56,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97689214] [2021-06-05 03:49:56,705 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:56,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:56,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:56,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:49:56,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:56,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97689214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:56,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:56,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 03:49:56,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043535437] [2021-06-05 03:49:56,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:49:56,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:56,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:49:56,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:56,841 INFO L87 Difference]: Start difference. First operand 75370 states and 324661 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) 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) [2021-06-05 03:49:57,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:57,951 INFO L93 Difference]: Finished difference Result 98132 states and 416693 transitions. [2021-06-05 03:49:57,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:49:57,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) 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 30 [2021-06-05 03:49:57,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:58,269 INFO L225 Difference]: With dead ends: 98132 [2021-06-05 03:49:58,269 INFO L226 Difference]: Without dead ends: 98068 [2021-06-05 03:49:58,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:49:58,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98068 states. [2021-06-05 03:50:00,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98068 to 90511. [2021-06-05 03:50:00,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90511 states, 90510 states have (on average 4.326869959120539) internal successors, (391625), 90510 states have internal predecessors, (391625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:01,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90511 states to 90511 states and 391625 transitions. [2021-06-05 03:50:01,433 INFO L78 Accepts]: Start accepts. Automaton has 90511 states and 391625 transitions. Word has length 30 [2021-06-05 03:50:01,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:01,433 INFO L482 AbstractCegarLoop]: Abstraction has 90511 states and 391625 transitions. [2021-06-05 03:50:01,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) 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) [2021-06-05 03:50:01,433 INFO L276 IsEmpty]: Start isEmpty. Operand 90511 states and 391625 transitions. [2021-06-05 03:50:01,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:50:01,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:01,628 INFO L521 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, 1] [2021-06-05 03:50:01,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:01,844 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:01,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:01,844 INFO L82 PathProgramCache]: Analyzing trace with hash 476999490, now seen corresponding path program 2 times [2021-06-05 03:50:01,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:01,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462202729] [2021-06-05 03:50:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:01,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:01,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462202729] [2021-06-05 03:50:01,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462202729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:01,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596943389] [2021-06-05 03:50:01,899 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:01,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:50:01,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:01,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:50:01,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:02,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596943389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:02,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:02,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 03:50:02,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219664439] [2021-06-05 03:50:02,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:50:02,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:02,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:50:02,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:02,070 INFO L87 Difference]: Start difference. First operand 90511 states and 391625 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:02,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:02,972 INFO L93 Difference]: Finished difference Result 98511 states and 417660 transitions. [2021-06-05 03:50:02,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:50:02,973 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 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 30 [2021-06-05 03:50:02,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:03,978 INFO L225 Difference]: With dead ends: 98511 [2021-06-05 03:50:03,978 INFO L226 Difference]: Without dead ends: 98337 [2021-06-05 03:50:03,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:50:04,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98337 states. [2021-06-05 03:50:06,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98337 to 90305. [2021-06-05 03:50:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90305 states, 90304 states have (on average 4.329077338766832) internal successors, (390933), 90304 states have internal predecessors, (390933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90305 states to 90305 states and 390933 transitions. [2021-06-05 03:50:06,959 INFO L78 Accepts]: Start accepts. Automaton has 90305 states and 390933 transitions. Word has length 30 [2021-06-05 03:50:06,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:06,960 INFO L482 AbstractCegarLoop]: Abstraction has 90305 states and 390933 transitions. [2021-06-05 03:50:06,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 90305 states and 390933 transitions. [2021-06-05 03:50:07,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:50:07,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:07,082 INFO L521 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, 1] [2021-06-05 03:50:07,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 03:50:07,283 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:07,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:07,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1372991872, now seen corresponding path program 3 times [2021-06-05 03:50:07,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:07,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187040126] [2021-06-05 03:50:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:07,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:07,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187040126] [2021-06-05 03:50:07,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187040126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:07,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304761423] [2021-06-05 03:50:07,386 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:07,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:50:07,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:07,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:50:07,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:07,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304761423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:07,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:07,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-06-05 03:50:07,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75194987] [2021-06-05 03:50:07,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:50:07,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:07,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:50:07,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:50:07,518 INFO L87 Difference]: Start difference. First operand 90305 states and 390933 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:08,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:08,786 INFO L93 Difference]: Finished difference Result 102107 states and 432585 transitions. [2021-06-05 03:50:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:50:08,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 30 [2021-06-05 03:50:08,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:09,147 INFO L225 Difference]: With dead ends: 102107 [2021-06-05 03:50:09,147 INFO L226 Difference]: Without dead ends: 101965 [2021-06-05 03:50:09,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:50:09,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101965 states. [2021-06-05 03:50:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101965 to 90694. [2021-06-05 03:50:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90694 states, 90693 states have (on average 4.332815101496257) internal successors, (392956), 90693 states have internal predecessors, (392956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90694 states to 90694 states and 392956 transitions. [2021-06-05 03:50:12,101 INFO L78 Accepts]: Start accepts. Automaton has 90694 states and 392956 transitions. Word has length 30 [2021-06-05 03:50:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:12,101 INFO L482 AbstractCegarLoop]: Abstraction has 90694 states and 392956 transitions. [2021-06-05 03:50:12,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 90694 states and 392956 transitions. [2021-06-05 03:50:12,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:50:12,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:12,224 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:12,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 03:50:12,425 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:12,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:12,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1079688236, now seen corresponding path program 21 times [2021-06-05 03:50:12,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:12,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663217207] [2021-06-05 03:50:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:12,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:12,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663217207] [2021-06-05 03:50:12,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663217207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:12,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994010465] [2021-06-05 03:50:12,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:12,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:50:12,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:12,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:50:12,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:13,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994010465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:13,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:13,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:50:13,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488018552] [2021-06-05 03:50:13,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:50:13,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:13,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:50:13,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:50:13,077 INFO L87 Difference]: Start difference. First operand 90694 states and 392956 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:15,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:15,192 INFO L93 Difference]: Finished difference Result 122868 states and 520265 transitions. [2021-06-05 03:50:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 03:50:15,192 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:50:15,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:15,607 INFO L225 Difference]: With dead ends: 122868 [2021-06-05 03:50:15,608 INFO L226 Difference]: Without dead ends: 120504 [2021-06-05 03:50:15,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 457.6ms TimeCoverageRelationStatistics Valid=315, Invalid=875, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:50:15,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120504 states. [2021-06-05 03:50:17,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120504 to 55126. [2021-06-05 03:50:17,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55126 states, 55125 states have (on average 4.2524444444444445) internal successors, (234416), 55125 states have internal predecessors, (234416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55126 states to 55126 states and 234416 transitions. [2021-06-05 03:50:17,623 INFO L78 Accepts]: Start accepts. Automaton has 55126 states and 234416 transitions. Word has length 30 [2021-06-05 03:50:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:17,624 INFO L482 AbstractCegarLoop]: Abstraction has 55126 states and 234416 transitions. [2021-06-05 03:50:17,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:17,624 INFO L276 IsEmpty]: Start isEmpty. Operand 55126 states and 234416 transitions. [2021-06-05 03:50:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:50:17,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:17,711 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:17,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 03:50:17,911 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:17,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1101625758, now seen corresponding path program 22 times [2021-06-05 03:50:17,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:17,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963374528] [2021-06-05 03:50:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:17,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:17,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963374528] [2021-06-05 03:50:17,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963374528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:17,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990201658] [2021-06-05 03:50:17,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:17,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:50:17,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:17,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:17,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:18,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 03:50:18,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:50:18,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:50:18,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:50:18,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 03:50:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:18,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990201658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:18,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:18,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 03:50:18,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440834222] [2021-06-05 03:50:18,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:50:18,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:18,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:50:18,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:50:18,439 INFO L87 Difference]: Start difference. First operand 55126 states and 234416 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:20,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:20,321 INFO L93 Difference]: Finished difference Result 84592 states and 350525 transitions. [2021-06-05 03:50:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 03:50:20,325 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:50:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:20,873 INFO L225 Difference]: With dead ends: 84592 [2021-06-05 03:50:20,873 INFO L226 Difference]: Without dead ends: 83864 [2021-06-05 03:50:20,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1025.0ms TimeCoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 03:50:20,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83864 states. [2021-06-05 03:50:22,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83864 to 68499. [2021-06-05 03:50:22,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68499 states, 68498 states have (on average 4.276489824520424) internal successors, (292931), 68498 states have internal predecessors, (292931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68499 states to 68499 states and 292931 transitions. [2021-06-05 03:50:22,647 INFO L78 Accepts]: Start accepts. Automaton has 68499 states and 292931 transitions. Word has length 30 [2021-06-05 03:50:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:22,647 INFO L482 AbstractCegarLoop]: Abstraction has 68499 states and 292931 transitions. [2021-06-05 03:50:22,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 68499 states and 292931 transitions. [2021-06-05 03:50:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:50:22,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:22,772 INFO L521 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, 1] [2021-06-05 03:50:22,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:22,973 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:22,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:22,973 INFO L82 PathProgramCache]: Analyzing trace with hash -356508804, now seen corresponding path program 4 times [2021-06-05 03:50:22,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:22,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403242060] [2021-06-05 03:50:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:23,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:23,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403242060] [2021-06-05 03:50:23,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403242060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:23,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838861472] [2021-06-05 03:50:23,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:23,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:50:23,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:23,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:50:23,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:23,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838861472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:23,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:23,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 03:50:23,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003836273] [2021-06-05 03:50:23,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:50:23,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:23,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:50:23,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:50:23,202 INFO L87 Difference]: Start difference. First operand 68499 states and 292931 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:25,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:25,361 INFO L93 Difference]: Finished difference Result 89398 states and 368677 transitions. [2021-06-05 03:50:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 03:50:25,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:50:25,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:25,644 INFO L225 Difference]: With dead ends: 89398 [2021-06-05 03:50:25,644 INFO L226 Difference]: Without dead ends: 88772 [2021-06-05 03:50:25,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 726.0ms TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:50:26,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88772 states. [2021-06-05 03:50:27,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88772 to 70166. [2021-06-05 03:50:27,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70166 states, 70165 states have (on average 4.271944701774389) internal successors, (299741), 70165 states have internal predecessors, (299741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:27,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70166 states to 70166 states and 299741 transitions. [2021-06-05 03:50:27,936 INFO L78 Accepts]: Start accepts. Automaton has 70166 states and 299741 transitions. Word has length 30 [2021-06-05 03:50:27,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:27,937 INFO L482 AbstractCegarLoop]: Abstraction has 70166 states and 299741 transitions. [2021-06-05 03:50:27,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:27,937 INFO L276 IsEmpty]: Start isEmpty. Operand 70166 states and 299741 transitions. [2021-06-05 03:50:28,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:50:28,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:28,063 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:28,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:28,264 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:28,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:28,264 INFO L82 PathProgramCache]: Analyzing trace with hash -967659738, now seen corresponding path program 23 times [2021-06-05 03:50:28,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:28,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944619576] [2021-06-05 03:50:28,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:28,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:28,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944619576] [2021-06-05 03:50:28,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944619576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:28,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621486535] [2021-06-05 03:50:28,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:28,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:50:28,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:28,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:50:28,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:28,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621486535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:28,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:28,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2021-06-05 03:50:28,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136186983] [2021-06-05 03:50:28,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:50:28,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:28,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:50:28,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:50:28,446 INFO L87 Difference]: Start difference. First operand 70166 states and 299741 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:29,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:29,926 INFO L93 Difference]: Finished difference Result 107773 states and 448693 transitions. [2021-06-05 03:50:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:50:29,927 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:50:29,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:30,281 INFO L225 Difference]: With dead ends: 107773 [2021-06-05 03:50:30,281 INFO L226 Difference]: Without dead ends: 107773 [2021-06-05 03:50:30,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:50:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107773 states. [2021-06-05 03:50:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107773 to 85136. [2021-06-05 03:50:32,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85136 states, 85135 states have (on average 4.30706524930992) internal successors, (366682), 85135 states have internal predecessors, (366682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85136 states to 85136 states and 366682 transitions. [2021-06-05 03:50:32,960 INFO L78 Accepts]: Start accepts. Automaton has 85136 states and 366682 transitions. Word has length 30 [2021-06-05 03:50:32,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:32,961 INFO L482 AbstractCegarLoop]: Abstraction has 85136 states and 366682 transitions. [2021-06-05 03:50:32,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 85136 states and 366682 transitions. [2021-06-05 03:50:33,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:50:33,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:33,103 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:33,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 03:50:33,304 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:33,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:33,305 INFO L82 PathProgramCache]: Analyzing trace with hash 733919980, now seen corresponding path program 24 times [2021-06-05 03:50:33,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:33,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740491815] [2021-06-05 03:50:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:33,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:33,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740491815] [2021-06-05 03:50:33,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740491815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:33,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446537062] [2021-06-05 03:50:33,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:33,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:50:33,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:33,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:50:33,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:33,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446537062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:33,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:33,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 03:50:33,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547765370] [2021-06-05 03:50:33,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:50:33,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:33,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:50:33,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:33,497 INFO L87 Difference]: Start difference. First operand 85136 states and 366682 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:35,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:35,383 INFO L93 Difference]: Finished difference Result 136874 states and 574741 transitions. [2021-06-05 03:50:35,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 03:50:35,384 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:50:35,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:35,851 INFO L225 Difference]: With dead ends: 136874 [2021-06-05 03:50:35,852 INFO L226 Difference]: Without dead ends: 135508 [2021-06-05 03:50:35,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 421.1ms TimeCoverageRelationStatistics Valid=373, Invalid=1187, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 03:50:36,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135508 states. [2021-06-05 03:50:38,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135508 to 93986. [2021-06-05 03:50:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93986 states, 93985 states have (on average 4.333212746714901) internal successors, (407257), 93985 states have internal predecessors, (407257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:39,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93986 states to 93986 states and 407257 transitions. [2021-06-05 03:50:39,321 INFO L78 Accepts]: Start accepts. Automaton has 93986 states and 407257 transitions. Word has length 30 [2021-06-05 03:50:39,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:39,321 INFO L482 AbstractCegarLoop]: Abstraction has 93986 states and 407257 transitions. [2021-06-05 03:50:39,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:39,321 INFO L276 IsEmpty]: Start isEmpty. Operand 93986 states and 407257 transitions. [2021-06-05 03:50:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:50:39,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:39,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:39,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 03:50:39,688 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:39,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:39,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1685858338, now seen corresponding path program 25 times [2021-06-05 03:50:39,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:39,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460665593] [2021-06-05 03:50:39,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:39,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:39,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460665593] [2021-06-05 03:50:39,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460665593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:39,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186989843] [2021-06-05 03:50:39,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:39,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:39,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:39,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 03:50:39,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:50:39,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:50:39,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:50:39,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 03:50:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:39,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186989843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:39,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:39,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:50:39,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204025282] [2021-06-05 03:50:39,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:50:39,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:39,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:50:39,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:39,888 INFO L87 Difference]: Start difference. First operand 93986 states and 407257 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:42,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:42,358 INFO L93 Difference]: Finished difference Result 122538 states and 522164 transitions. [2021-06-05 03:50:42,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 03:50:42,359 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:50:42,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:42,789 INFO L225 Difference]: With dead ends: 122538 [2021-06-05 03:50:42,790 INFO L226 Difference]: Without dead ends: 122036 [2021-06-05 03:50:42,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 709.6ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 03:50:42,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122036 states. [2021-06-05 03:50:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122036 to 107696. [2021-06-05 03:50:45,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107696 states, 107695 states have (on average 4.352569757184642) internal successors, (468750), 107695 states have internal predecessors, (468750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:46,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107696 states to 107696 states and 468750 transitions. [2021-06-05 03:50:46,342 INFO L78 Accepts]: Start accepts. Automaton has 107696 states and 468750 transitions. Word has length 30 [2021-06-05 03:50:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:46,342 INFO L482 AbstractCegarLoop]: Abstraction has 107696 states and 468750 transitions. [2021-06-05 03:50:46,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 107696 states and 468750 transitions. [2021-06-05 03:50:46,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:50:46,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:46,558 INFO L521 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, 1] [2021-06-05 03:50:46,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:46,758 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:46,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:46,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1675959326, now seen corresponding path program 5 times [2021-06-05 03:50:46,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:46,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865010878] [2021-06-05 03:50:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:46,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:46,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865010878] [2021-06-05 03:50:46,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865010878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:46,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717921044] [2021-06-05 03:50:46,803 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:46,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:50:46,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:46,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:50:46,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:46,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717921044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:46,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:46,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 03:50:46,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460465053] [2021-06-05 03:50:46,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:50:46,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:46,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:50:46,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:46,921 INFO L87 Difference]: Start difference. First operand 107696 states and 468750 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) [2021-06-05 03:50:48,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:48,819 INFO L93 Difference]: Finished difference Result 152595 states and 646553 transitions. [2021-06-05 03:50:48,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:50:48,820 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 30 [2021-06-05 03:50:48,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:49,343 INFO L225 Difference]: With dead ends: 152595 [2021-06-05 03:50:49,343 INFO L226 Difference]: Without dead ends: 152595 [2021-06-05 03:50:49,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:50:49,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152595 states. [2021-06-05 03:50:52,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152595 to 126512. [2021-06-05 03:50:52,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126512 states, 126511 states have (on average 4.371912323829548) internal successors, (553095), 126511 states have internal predecessors, (553095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126512 states to 126512 states and 553095 transitions. [2021-06-05 03:50:53,361 INFO L78 Accepts]: Start accepts. Automaton has 126512 states and 553095 transitions. Word has length 30 [2021-06-05 03:50:53,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:53,361 INFO L482 AbstractCegarLoop]: Abstraction has 126512 states and 553095 transitions. [2021-06-05 03:50:53,361 INFO L483 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) [2021-06-05 03:50:53,361 INFO L276 IsEmpty]: Start isEmpty. Operand 126512 states and 553095 transitions. [2021-06-05 03:50:53,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:50:53,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:53,526 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:53,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 03:50:53,727 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:53,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:53,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1840643646, now seen corresponding path program 26 times [2021-06-05 03:50:53,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:53,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104208956] [2021-06-05 03:50:53,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:53,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:53,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104208956] [2021-06-05 03:50:53,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104208956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:53,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683395337] [2021-06-05 03:50:53,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:50:53,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:50:53,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:53,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:53,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:53,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683395337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:53,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:53,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:50:53,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933492777] [2021-06-05 03:50:53,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:50:53,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:53,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:50:53,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:53,920 INFO L87 Difference]: Start difference. First operand 126512 states and 553095 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:55,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:55,496 INFO L93 Difference]: Finished difference Result 141394 states and 612178 transitions. [2021-06-05 03:50:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:50:55,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:50:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:56,001 INFO L225 Difference]: With dead ends: 141394 [2021-06-05 03:50:56,002 INFO L226 Difference]: Without dead ends: 141322 [2021-06-05 03:50:56,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 269.4ms TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:50:56,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141322 states. [2021-06-05 03:50:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141322 to 126703. [2021-06-05 03:50:59,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126703 states, 126702 states have (on average 4.370017837129643) internal successors, (553690), 126702 states have internal predecessors, (553690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:00,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126703 states to 126703 states and 553690 transitions. [2021-06-05 03:51:00,000 INFO L78 Accepts]: Start accepts. Automaton has 126703 states and 553690 transitions. Word has length 30 [2021-06-05 03:51:00,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:00,000 INFO L482 AbstractCegarLoop]: Abstraction has 126703 states and 553690 transitions. [2021-06-05 03:51:00,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:00,001 INFO L276 IsEmpty]: Start isEmpty. Operand 126703 states and 553690 transitions. [2021-06-05 03:51:00,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:51:00,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:00,166 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:00,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:00,366 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:00,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:00,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1447640776, now seen corresponding path program 27 times [2021-06-05 03:51:00,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:00,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062325823] [2021-06-05 03:51:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:00,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:00,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062325823] [2021-06-05 03:51:00,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062325823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:00,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635043492] [2021-06-05 03:51:00,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:00,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:51:00,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:00,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:51:00,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:00,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635043492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:00,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:00,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:51:00,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074705501] [2021-06-05 03:51:00,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:51:00,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:00,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:51:00,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:00,549 INFO L87 Difference]: Start difference. First operand 126703 states and 553690 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) 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) [2021-06-05 03:51:02,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:02,065 INFO L93 Difference]: Finished difference Result 141176 states and 611517 transitions. [2021-06-05 03:51:02,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:51:02,066 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) 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 30 [2021-06-05 03:51:02,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:02,553 INFO L225 Difference]: With dead ends: 141176 [2021-06-05 03:51:02,554 INFO L226 Difference]: Without dead ends: 141132 [2021-06-05 03:51:02,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:51:02,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141132 states. [2021-06-05 03:51:05,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141132 to 126705. [2021-06-05 03:51:05,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126705 states, 126704 states have (on average 4.370067243338806) internal successors, (553705), 126704 states have internal predecessors, (553705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:06,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126705 states to 126705 states and 553705 transitions. [2021-06-05 03:51:06,516 INFO L78 Accepts]: Start accepts. Automaton has 126705 states and 553705 transitions. Word has length 30 [2021-06-05 03:51:06,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:06,516 INFO L482 AbstractCegarLoop]: Abstraction has 126705 states and 553705 transitions. [2021-06-05 03:51:06,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) 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) [2021-06-05 03:51:06,517 INFO L276 IsEmpty]: Start isEmpty. Operand 126705 states and 553705 transitions. [2021-06-05 03:51:06,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:51:06,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:06,693 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:06,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 03:51:06,909 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1706436100, now seen corresponding path program 28 times [2021-06-05 03:51:06,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:06,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6621224] [2021-06-05 03:51:06,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:07,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:07,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6621224] [2021-06-05 03:51:07,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6621224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:07,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993383544] [2021-06-05 03:51:07,067 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:07,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:07,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:07,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:07,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:07,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 03:51:07,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:51:07,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:51:07,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:51:07,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 03:51:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:07,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993383544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:07,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:07,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:51:07,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420825196] [2021-06-05 03:51:07,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:51:07,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:07,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:51:07,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:07,208 INFO L87 Difference]: Start difference. First operand 126705 states and 553705 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:09,344 INFO L93 Difference]: Finished difference Result 149894 states and 645986 transitions. [2021-06-05 03:51:09,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 03:51:09,344 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:51:09,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:09,833 INFO L225 Difference]: With dead ends: 149894 [2021-06-05 03:51:09,833 INFO L226 Difference]: Without dead ends: 149494 [2021-06-05 03:51:09,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 599.9ms TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:51:10,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149494 states. [2021-06-05 03:51:12,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149494 to 129512. [2021-06-05 03:51:12,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129512 states, 129511 states have (on average 4.370130722486893) internal successors, (565980), 129511 states have internal predecessors, (565980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:13,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129512 states to 129512 states and 565980 transitions. [2021-06-05 03:51:13,741 INFO L78 Accepts]: Start accepts. Automaton has 129512 states and 565980 transitions. Word has length 30 [2021-06-05 03:51:13,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:13,741 INFO L482 AbstractCegarLoop]: Abstraction has 129512 states and 565980 transitions. [2021-06-05 03:51:13,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:13,742 INFO L276 IsEmpty]: Start isEmpty. Operand 129512 states and 565980 transitions. [2021-06-05 03:51:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:51:13,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:13,912 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:14,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 03:51:14,112 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:14,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:14,113 INFO L82 PathProgramCache]: Analyzing trace with hash 461248004, now seen corresponding path program 29 times [2021-06-05 03:51:14,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:14,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274244349] [2021-06-05 03:51:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:14,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:14,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274244349] [2021-06-05 03:51:14,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274244349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:14,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30666238] [2021-06-05 03:51:14,160 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:14,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:51:14,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:14,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:51:14,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:14,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30666238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:14,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:14,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:51:14,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550257766] [2021-06-05 03:51:14,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:14,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:14,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:14,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:14,295 INFO L87 Difference]: Start difference. First operand 129512 states and 565980 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:17,272 INFO L93 Difference]: Finished difference Result 214461 states and 912367 transitions. [2021-06-05 03:51:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 03:51:17,285 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:51:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:18,075 INFO L225 Difference]: With dead ends: 214461 [2021-06-05 03:51:18,076 INFO L226 Difference]: Without dead ends: 212520 [2021-06-05 03:51:18,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 730.5ms TimeCoverageRelationStatistics Valid=726, Invalid=2030, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 03:51:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212520 states. [2021-06-05 03:51:22,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212520 to 132616. [2021-06-05 03:51:22,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132616 states, 132615 states have (on average 4.362892583795197) internal successors, (578585), 132615 states have internal predecessors, (578585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:22,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132616 states to 132616 states and 578585 transitions. [2021-06-05 03:51:22,685 INFO L78 Accepts]: Start accepts. Automaton has 132616 states and 578585 transitions. Word has length 30 [2021-06-05 03:51:22,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:22,685 INFO L482 AbstractCegarLoop]: Abstraction has 132616 states and 578585 transitions. [2021-06-05 03:51:22,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:22,686 INFO L276 IsEmpty]: Start isEmpty. Operand 132616 states and 578585 transitions. [2021-06-05 03:51:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:51:23,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:23,346 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:23,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:23,561 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:23,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:23,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1201227792, now seen corresponding path program 30 times [2021-06-05 03:51:23,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:23,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170799594] [2021-06-05 03:51:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:23,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:23,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170799594] [2021-06-05 03:51:23,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170799594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:23,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094544281] [2021-06-05 03:51:23,614 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:23,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:51:23,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:23,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:51:23,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:23,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094544281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:23,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:23,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 03:51:23,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524891283] [2021-06-05 03:51:23,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:23,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:23,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:23,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:23,723 INFO L87 Difference]: Start difference. First operand 132616 states and 578585 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:26,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:26,641 INFO L93 Difference]: Finished difference Result 300250 states and 1286549 transitions. [2021-06-05 03:51:26,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 03:51:26,641 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:51:26,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:28,236 INFO L225 Difference]: With dead ends: 300250 [2021-06-05 03:51:28,236 INFO L226 Difference]: Without dead ends: 300250 [2021-06-05 03:51:28,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 462.9ms TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 03:51:28,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300250 states. [2021-06-05 03:51:33,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300250 to 212691. [2021-06-05 03:51:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212691 states, 212690 states have (on average 4.4037519394423805) internal successors, (936634), 212690 states have internal predecessors, (936634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212691 states to 212691 states and 936634 transitions. [2021-06-05 03:51:35,530 INFO L78 Accepts]: Start accepts. Automaton has 212691 states and 936634 transitions. Word has length 30 [2021-06-05 03:51:35,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:35,530 INFO L482 AbstractCegarLoop]: Abstraction has 212691 states and 936634 transitions. [2021-06-05 03:51:35,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:35,531 INFO L276 IsEmpty]: Start isEmpty. Operand 212691 states and 936634 transitions. [2021-06-05 03:51:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:51:35,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:35,759 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:35,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:35,959 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:35,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:35,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1407643986, now seen corresponding path program 31 times [2021-06-05 03:51:35,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:35,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224942119] [2021-06-05 03:51:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:36,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:36,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224942119] [2021-06-05 03:51:36,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224942119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:36,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803490751] [2021-06-05 03:51:36,009 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:36,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:36,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:36,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-06-05 03:51:36,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:51:36,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:51:36,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:51:36,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:20 [2021-06-05 03:51:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:36,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803490751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:36,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:36,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:51:36,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085027996] [2021-06-05 03:51:36,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:51:36,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:36,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:51:36,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:36,161 INFO L87 Difference]: Start difference. First operand 212691 states and 936634 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:37,421 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-06-05 03:51:40,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:40,811 INFO L93 Difference]: Finished difference Result 282236 states and 1220316 transitions. [2021-06-05 03:51:40,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 03:51:40,812 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:51:40,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:42,706 INFO L225 Difference]: With dead ends: 282236 [2021-06-05 03:51:42,706 INFO L226 Difference]: Without dead ends: 281826 [2021-06-05 03:51:42,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1439.1ms TimeCoverageRelationStatistics Valid=560, Invalid=2410, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 03:51:43,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281826 states. [2021-06-05 03:51:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281826 to 224350. [2021-06-05 03:51:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224350 states, 224349 states have (on average 4.40408916464972) internal successors, (988053), 224349 states have internal predecessors, (988053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224350 states to 224350 states and 988053 transitions. [2021-06-05 03:51:49,934 INFO L78 Accepts]: Start accepts. Automaton has 224350 states and 988053 transitions. Word has length 30 [2021-06-05 03:51:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:49,934 INFO L482 AbstractCegarLoop]: Abstraction has 224350 states and 988053 transitions. [2021-06-05 03:51:49,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 224350 states and 988053 transitions. [2021-06-05 03:51:50,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:51:50,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:50,199 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:50,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:50,400 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:50,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:50,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1625498796, now seen corresponding path program 32 times [2021-06-05 03:51:50,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:50,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911938946] [2021-06-05 03:51:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:50,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:50,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911938946] [2021-06-05 03:51:50,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911938946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:50,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888425959] [2021-06-05 03:51:50,440 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:50,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:50,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:50,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:51:50,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:50,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888425959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:50,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:50,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:51:50,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779760415] [2021-06-05 03:51:50,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:51:50,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:50,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:51:50,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:50,591 INFO L87 Difference]: Start difference. First operand 224350 states and 988053 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:56,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:56,605 INFO L93 Difference]: Finished difference Result 486397 states and 2091172 transitions. [2021-06-05 03:51:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 03:51:56,606 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:51:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:59,112 INFO L225 Difference]: With dead ends: 486397 [2021-06-05 03:51:59,112 INFO L226 Difference]: Without dead ends: 483934 [2021-06-05 03:51:59,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2369 ImplicationChecksByTransitivity, 1511.6ms TimeCoverageRelationStatistics Valid=1330, Invalid=5810, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 03:51:59,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483934 states. [2021-06-05 03:52:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483934 to 267199. [2021-06-05 03:52:08,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267199 states, 267198 states have (on average 4.399258227980749) internal successors, (1175473), 267198 states have internal predecessors, (1175473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267199 states to 267199 states and 1175473 transitions. [2021-06-05 03:52:10,148 INFO L78 Accepts]: Start accepts. Automaton has 267199 states and 1175473 transitions. Word has length 30 [2021-06-05 03:52:10,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:10,148 INFO L482 AbstractCegarLoop]: Abstraction has 267199 states and 1175473 transitions. [2021-06-05 03:52:10,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 267199 states and 1175473 transitions. [2021-06-05 03:52:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 03:52:11,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:11,067 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:11,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:11,284 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:11,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:11,284 INFO L82 PathProgramCache]: Analyzing trace with hash -154432502, now seen corresponding path program 33 times [2021-06-05 03:52:11,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:11,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327063895] [2021-06-05 03:52:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:11,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:11,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327063895] [2021-06-05 03:52:11,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327063895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:11,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804548017] [2021-06-05 03:52:11,329 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:11,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:52:11,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:11,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:52:11,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:11,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804548017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:11,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:11,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:52:11,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285015213] [2021-06-05 03:52:11,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:11,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:11,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:11,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:11,438 INFO L87 Difference]: Start difference. First operand 267199 states and 1175473 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:15,305 INFO L93 Difference]: Finished difference Result 404661 states and 1760197 transitions. [2021-06-05 03:52:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 03:52:15,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 03:52:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:16,861 INFO L225 Difference]: With dead ends: 404661 [2021-06-05 03:52:16,861 INFO L226 Difference]: Without dead ends: 403634 [2021-06-05 03:52:16,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 330.2ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 03:52:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403634 states. [2021-06-05 03:52:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403634 to 196954. [2021-06-05 03:52:23,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196954 states, 196953 states have (on average 4.401897914730926) internal successors, (866967), 196953 states have internal predecessors, (866967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196954 states to 196954 states and 866967 transitions. [2021-06-05 03:52:24,310 INFO L78 Accepts]: Start accepts. Automaton has 196954 states and 866967 transitions. Word has length 30 [2021-06-05 03:52:24,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:24,310 INFO L482 AbstractCegarLoop]: Abstraction has 196954 states and 866967 transitions. [2021-06-05 03:52:24,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 196954 states and 866967 transitions. [2021-06-05 03:52:24,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:52:24,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:24,551 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:24,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:24,752 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:24,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:24,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1759456308, now seen corresponding path program 34 times [2021-06-05 03:52:24,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:24,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109985550] [2021-06-05 03:52:24,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:24,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:24,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109985550] [2021-06-05 03:52:24,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109985550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:24,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845832603] [2021-06-05 03:52:24,814 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:24,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:24,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:24,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:52:24,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:24,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845832603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:24,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:24,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 03:52:24,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605814212] [2021-06-05 03:52:24,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:52:24,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:24,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:52:24,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:52:24,972 INFO L87 Difference]: Start difference. First operand 196954 states and 866967 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:27,873 INFO L93 Difference]: Finished difference Result 299970 states and 1308288 transitions. [2021-06-05 03:52:27,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:52:27,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 33 [2021-06-05 03:52:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:28,985 INFO L225 Difference]: With dead ends: 299970 [2021-06-05 03:52:28,985 INFO L226 Difference]: Without dead ends: 297610 [2021-06-05 03:52:28,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297610 states. [2021-06-05 03:52:35,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297610 to 245260. [2021-06-05 03:52:36,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245260 states, 245259 states have (on average 4.444477063023172) internal successors, (1090048), 245259 states have internal predecessors, (1090048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245260 states to 245260 states and 1090048 transitions. [2021-06-05 03:52:37,790 INFO L78 Accepts]: Start accepts. Automaton has 245260 states and 1090048 transitions. Word has length 33 [2021-06-05 03:52:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:37,790 INFO L482 AbstractCegarLoop]: Abstraction has 245260 states and 1090048 transitions. [2021-06-05 03:52:37,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 245260 states and 1090048 transitions. [2021-06-05 03:52:38,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:52:38,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:38,148 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:38,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 03:52:38,349 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:38,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:38,349 INFO L82 PathProgramCache]: Analyzing trace with hash -843323476, now seen corresponding path program 1 times [2021-06-05 03:52:38,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:38,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395708737] [2021-06-05 03:52:38,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:38,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:38,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395708737] [2021-06-05 03:52:38,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395708737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:38,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138000491] [2021-06-05 03:52:38,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:38,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:52:38,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:38,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 03:52:38,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:52:38,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:52:38,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:52:38,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 03:52:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:38,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138000491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:38,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:38,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-06-05 03:52:38,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989179294] [2021-06-05 03:52:38,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:38,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:38,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:38,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:38,556 INFO L87 Difference]: Start difference. First operand 245260 states and 1090048 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:40,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:40,770 INFO L93 Difference]: Finished difference Result 248659 states and 1102596 transitions. [2021-06-05 03:52:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:52:40,771 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 03:52:40,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:42,288 INFO L225 Difference]: With dead ends: 248659 [2021-06-05 03:52:42,288 INFO L226 Difference]: Without dead ends: 248539 [2021-06-05 03:52:42,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:52:42,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248539 states. [2021-06-05 03:52:46,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248539 to 247204. [2021-06-05 03:52:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247204 states, 247203 states have (on average 4.439096612905183) internal successors, (1097358), 247203 states have internal predecessors, (1097358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247204 states to 247204 states and 1097358 transitions. [2021-06-05 03:52:48,888 INFO L78 Accepts]: Start accepts. Automaton has 247204 states and 1097358 transitions. Word has length 33 [2021-06-05 03:52:48,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:48,888 INFO L482 AbstractCegarLoop]: Abstraction has 247204 states and 1097358 transitions. [2021-06-05 03:52:48,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:48,888 INFO L276 IsEmpty]: Start isEmpty. Operand 247204 states and 1097358 transitions. [2021-06-05 03:52:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:52:49,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:49,854 INFO L521 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-06-05 03:52:50,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 03:52:50,069 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:50,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1857877874, now seen corresponding path program 1 times [2021-06-05 03:52:50,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:50,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248199971] [2021-06-05 03:52:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:50,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:50,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248199971] [2021-06-05 03:52:50,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248199971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:50,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624291671] [2021-06-05 03:52:50,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:50,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:50,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:50,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624291671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:50,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:50,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 03:52:50,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099358144] [2021-06-05 03:52:50,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:52:50,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:50,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:52:50,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:50,346 INFO L87 Difference]: Start difference. First operand 247204 states and 1097358 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:52,504 INFO L93 Difference]: Finished difference Result 249510 states and 1105535 transitions. [2021-06-05 03:52:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:52:52,505 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 03:52:52,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:53,908 INFO L225 Difference]: With dead ends: 249510 [2021-06-05 03:52:53,908 INFO L226 Difference]: Without dead ends: 248501 [2021-06-05 03:52:53,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 284.9ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:52:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248501 states. [2021-06-05 03:52:58,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248501 to 247941. [2021-06-05 03:52:58,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247941 states, 247940 states have (on average 4.436609663628297) internal successors, (1100013), 247940 states have internal predecessors, (1100013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247941 states to 247941 states and 1100013 transitions. [2021-06-05 03:53:00,422 INFO L78 Accepts]: Start accepts. Automaton has 247941 states and 1100013 transitions. Word has length 33 [2021-06-05 03:53:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:00,422 INFO L482 AbstractCegarLoop]: Abstraction has 247941 states and 1100013 transitions. [2021-06-05 03:53:00,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 247941 states and 1100013 transitions. [2021-06-05 03:53:00,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:53:00,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:00,748 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:00,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:00,949 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:00,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:00,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1129985132, now seen corresponding path program 2 times [2021-06-05 03:53:00,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:00,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550776206] [2021-06-05 03:53:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:01,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:01,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550776206] [2021-06-05 03:53:01,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550776206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:01,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843041339] [2021-06-05 03:53:01,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:01,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:01,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:01,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:01,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:01,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 03:53:01,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:53:01,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:53:01,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:53:01,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 03:53:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:01,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843041339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:01,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:01,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-06-05 03:53:01,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093854079] [2021-06-05 03:53:01,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:01,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:01,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:01,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:01,803 INFO L87 Difference]: Start difference. First operand 247941 states and 1100013 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:04,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:04,076 INFO L93 Difference]: Finished difference Result 258027 states and 1137213 transitions. [2021-06-05 03:53:04,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:53:04,076 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 03:53:04,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:05,006 INFO L225 Difference]: With dead ends: 258027 [2021-06-05 03:53:05,006 INFO L226 Difference]: Without dead ends: 257921 [2021-06-05 03:53:05,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:53:05,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257921 states. [2021-06-05 03:53:10,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257921 to 249856. [2021-06-05 03:53:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249856 states, 249855 states have (on average 4.432294730943948) internal successors, (1107431), 249855 states have internal predecessors, (1107431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249856 states to 249856 states and 1107431 transitions. [2021-06-05 03:53:12,988 INFO L78 Accepts]: Start accepts. Automaton has 249856 states and 1107431 transitions. Word has length 33 [2021-06-05 03:53:12,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:12,988 INFO L482 AbstractCegarLoop]: Abstraction has 249856 states and 1107431 transitions. [2021-06-05 03:53:12,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 249856 states and 1107431 transitions. [2021-06-05 03:53:13,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:53:13,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:13,416 INFO L521 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-06-05 03:53:13,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 03:53:13,629 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:13,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:13,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1036448618, now seen corresponding path program 2 times [2021-06-05 03:53:13,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:13,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203793351] [2021-06-05 03:53:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:13,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:13,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203793351] [2021-06-05 03:53:13,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203793351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:13,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548714813] [2021-06-05 03:53:13,779 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:13,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:13,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:13,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:13,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:14,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548714813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:14,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:14,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 03:53:14,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243982632] [2021-06-05 03:53:14,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:53:14,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:14,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:53:14,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:14,043 INFO L87 Difference]: Start difference. First operand 249856 states and 1107431 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:14,819 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-06-05 03:53:17,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:17,681 INFO L93 Difference]: Finished difference Result 251203 states and 1111360 transitions. [2021-06-05 03:53:17,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:53:17,682 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 03:53:17,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:19,114 INFO L225 Difference]: With dead ends: 251203 [2021-06-05 03:53:19,114 INFO L226 Difference]: Without dead ends: 250188 [2021-06-05 03:53:19,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1093.0ms TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:53:19,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250188 states. [2021-06-05 03:53:24,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250188 to 249232. [2021-06-05 03:53:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249232 states, 249231 states have (on average 4.431382933904691) internal successors, (1104438), 249231 states have internal predecessors, (1104438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249232 states to 249232 states and 1104438 transitions. [2021-06-05 03:53:26,214 INFO L78 Accepts]: Start accepts. Automaton has 249232 states and 1104438 transitions. Word has length 33 [2021-06-05 03:53:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:26,214 INFO L482 AbstractCegarLoop]: Abstraction has 249232 states and 1104438 transitions. [2021-06-05 03:53:26,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 249232 states and 1104438 transitions. [2021-06-05 03:53:26,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:53:26,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:26,554 INFO L521 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-06-05 03:53:26,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:26,754 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:26,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:26,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1947467614, now seen corresponding path program 3 times [2021-06-05 03:53:26,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:26,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296490887] [2021-06-05 03:53:26,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:26,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:26,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296490887] [2021-06-05 03:53:26,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296490887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:26,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713854370] [2021-06-05 03:53:26,841 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:26,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:53:26,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:26,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:26,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:27,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713854370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:27,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:27,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 03:53:27,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288279357] [2021-06-05 03:53:27,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:53:27,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:27,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:53:27,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:27,054 INFO L87 Difference]: Start difference. First operand 249232 states and 1104438 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:30,234 INFO L93 Difference]: Finished difference Result 253243 states and 1118843 transitions. [2021-06-05 03:53:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:53:30,235 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 03:53:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:31,229 INFO L225 Difference]: With dead ends: 253243 [2021-06-05 03:53:31,230 INFO L226 Difference]: Without dead ends: 251565 [2021-06-05 03:53:31,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 496.4ms TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:53:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251565 states. [2021-06-05 03:53:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251565 to 250713. [2021-06-05 03:53:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250713 states, 250712 states have (on average 4.423908707999617) internal successors, (1109127), 250712 states have internal predecessors, (1109127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:38,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250713 states to 250713 states and 1109127 transitions. [2021-06-05 03:53:38,427 INFO L78 Accepts]: Start accepts. Automaton has 250713 states and 1109127 transitions. Word has length 33 [2021-06-05 03:53:38,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:38,427 INFO L482 AbstractCegarLoop]: Abstraction has 250713 states and 1109127 transitions. [2021-06-05 03:53:38,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:38,427 INFO L276 IsEmpty]: Start isEmpty. Operand 250713 states and 1109127 transitions. [2021-06-05 03:53:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:53:38,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:38,783 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:38,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-06-05 03:53:38,984 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:38,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:38,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1681201706, now seen corresponding path program 35 times [2021-06-05 03:53:38,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:38,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536931262] [2021-06-05 03:53:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:53:39,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:39,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536931262] [2021-06-05 03:53:39,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536931262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:39,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549775907] [2021-06-05 03:53:39,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:39,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:53:39,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:39,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:53:39,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:53:39,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549775907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:39,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:39,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 03:53:39,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439053455] [2021-06-05 03:53:39,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:53:39,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:39,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:53:39,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:39,170 INFO L87 Difference]: Start difference. First operand 250713 states and 1109127 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-06-05 03:53:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:42,767 INFO L93 Difference]: Finished difference Result 408902 states and 1783714 transitions. [2021-06-05 03:53:42,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:53:42,767 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 33 [2021-06-05 03:53:42,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:45,056 INFO L225 Difference]: With dead ends: 408902 [2021-06-05 03:53:45,057 INFO L226 Difference]: Without dead ends: 403086 [2021-06-05 03:53:45,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:53:45,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403086 states. [2021-06-05 03:53:55,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403086 to 323030. [2021-06-05 03:53:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323030 states, 323029 states have (on average 4.426342526522387) internal successors, (1429837), 323029 states have internal predecessors, (1429837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:57,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323030 states to 323030 states and 1429837 transitions. [2021-06-05 03:53:57,751 INFO L78 Accepts]: Start accepts. Automaton has 323030 states and 1429837 transitions. Word has length 33 [2021-06-05 03:53:57,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:57,752 INFO L482 AbstractCegarLoop]: Abstraction has 323030 states and 1429837 transitions. [2021-06-05 03:53:57,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-06-05 03:53:57,752 INFO L276 IsEmpty]: Start isEmpty. Operand 323030 states and 1429837 transitions. [2021-06-05 03:53:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:53:58,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:58,208 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:58,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:58,424 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:58,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:58,424 INFO L82 PathProgramCache]: Analyzing trace with hash -913135154, now seen corresponding path program 36 times [2021-06-05 03:53:58,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:58,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095184573] [2021-06-05 03:53:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:53:58,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:58,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095184573] [2021-06-05 03:53:58,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095184573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:58,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295541913] [2021-06-05 03:53:58,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:58,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:53:58,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:58,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:58,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:58,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295541913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:58,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:58,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2021-06-05 03:53:58,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989796081] [2021-06-05 03:53:58,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:58,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:58,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:58,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:58,696 INFO L87 Difference]: Start difference. First operand 323030 states and 1429837 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:00,052 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-06-05 03:54:06,892 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-06-05 03:54:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:09,838 INFO L93 Difference]: Finished difference Result 564498 states and 2414011 transitions. [2021-06-05 03:54:09,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-06-05 03:54:09,838 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 03:54:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:12,564 INFO L225 Difference]: With dead ends: 564498 [2021-06-05 03:54:12,565 INFO L226 Difference]: Without dead ends: 555301 [2021-06-05 03:54:12,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10906 ImplicationChecksByTransitivity, 4871.9ms TimeCoverageRelationStatistics Valid=3771, Invalid=24959, Unknown=0, NotChecked=0, Total=28730 [2021-06-05 03:54:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555301 states. [2021-06-05 03:54:26,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555301 to 426258. [2021-06-05 03:54:27,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426258 states, 426257 states have (on average 4.406536432246274) internal successors, (1878317), 426257 states have internal predecessors, (1878317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:29,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426258 states to 426258 states and 1878317 transitions. [2021-06-05 03:54:29,731 INFO L78 Accepts]: Start accepts. Automaton has 426258 states and 1878317 transitions. Word has length 33 [2021-06-05 03:54:29,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:29,731 INFO L482 AbstractCegarLoop]: Abstraction has 426258 states and 1878317 transitions. [2021-06-05 03:54:29,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:29,731 INFO L276 IsEmpty]: Start isEmpty. Operand 426258 states and 1878317 transitions. [2021-06-05 03:54:30,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:54:30,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:30,888 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:31,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:31,101 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:31,101 INFO L82 PathProgramCache]: Analyzing trace with hash -261102064, now seen corresponding path program 37 times [2021-06-05 03:54:31,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:31,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706938077] [2021-06-05 03:54:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:31,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:31,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706938077] [2021-06-05 03:54:31,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706938077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:31,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339791] [2021-06-05 03:54:31,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:31,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:54:31,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:31,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:31,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:31,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 03:54:31,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407784939] [2021-06-05 03:54:31,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:54:31,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:31,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:54:31,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:54:31,298 INFO L87 Difference]: Start difference. First operand 426258 states and 1878317 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:36,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:36,402 INFO L93 Difference]: Finished difference Result 512157 states and 2229861 transitions. [2021-06-05 03:54:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:54:36,402 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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 33 [2021-06-05 03:54:36,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:40,426 INFO L225 Difference]: With dead ends: 512157 [2021-06-05 03:54:40,426 INFO L226 Difference]: Without dead ends: 504596 [2021-06-05 03:54:40,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:54:41,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504596 states. [2021-06-05 03:54:53,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504596 to 450713. [2021-06-05 03:54:53,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450713 states, 450712 states have (on average 4.414107012904028) internal successors, (1989491), 450712 states have internal predecessors, (1989491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450713 states to 450713 states and 1989491 transitions. [2021-06-05 03:54:56,623 INFO L78 Accepts]: Start accepts. Automaton has 450713 states and 1989491 transitions. Word has length 33 [2021-06-05 03:54:56,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:56,623 INFO L482 AbstractCegarLoop]: Abstraction has 450713 states and 1989491 transitions. [2021-06-05 03:54:56,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:56,623 INFO L276 IsEmpty]: Start isEmpty. Operand 450713 states and 1989491 transitions. [2021-06-05 03:54:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:54:57,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:57,860 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:58,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:58,073 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:58,073 INFO L82 PathProgramCache]: Analyzing trace with hash -766822484, now seen corresponding path program 1 times [2021-06-05 03:54:58,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:58,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016625001] [2021-06-05 03:54:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:58,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:58,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016625001] [2021-06-05 03:54:58,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016625001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:58,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149649028] [2021-06-05 03:54:58,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:58,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:54:58,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:58,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 03:54:58,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:54:58,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:54:58,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:54:58,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 03:54:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:58,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149649028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:58,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:58,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 03:54:58,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798458865] [2021-06-05 03:54:58,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:58,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:58,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:58,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:58,367 INFO L87 Difference]: Start difference. First operand 450713 states and 1989491 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:03,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:03,379 INFO L93 Difference]: Finished difference Result 464985 states and 2044238 transitions. [2021-06-05 03:55:03,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:55:03,379 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 03:55:03,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:05,403 INFO L225 Difference]: With dead ends: 464985 [2021-06-05 03:55:05,403 INFO L226 Difference]: Without dead ends: 464885 [2021-06-05 03:55:05,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 368.0ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:55:06,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464885 states. [2021-06-05 03:55:16,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464885 to 456514. [2021-06-05 03:55:17,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456514 states, 456513 states have (on average 4.410663004120365) internal successors, (2013525), 456513 states have internal predecessors, (2013525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456514 states to 456514 states and 2013525 transitions. [2021-06-05 03:55:22,231 INFO L78 Accepts]: Start accepts. Automaton has 456514 states and 2013525 transitions. Word has length 33 [2021-06-05 03:55:22,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:22,232 INFO L482 AbstractCegarLoop]: Abstraction has 456514 states and 2013525 transitions. [2021-06-05 03:55:22,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,232 INFO L276 IsEmpty]: Start isEmpty. Operand 456514 states and 2013525 transitions. [2021-06-05 03:55:23,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:55:23,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:23,362 INFO L521 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-06-05 03:55:23,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 03:55:23,569 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:23,569 INFO L82 PathProgramCache]: Analyzing trace with hash 149310348, now seen corresponding path program 1 times [2021-06-05 03:55:23,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:23,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726883509] [2021-06-05 03:55:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:23,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:23,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726883509] [2021-06-05 03:55:23,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726883509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:23,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062634007] [2021-06-05 03:55:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2021-06-05 03:55:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:23,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:55:23,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:23,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062634007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:23,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:23,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 03:55:23,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296847238] [2021-06-05 03:55:23,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:23,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:23,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:23,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:23,965 INFO L87 Difference]: Start difference. First operand 456514 states and 2013525 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:30,416 INFO L93 Difference]: Finished difference Result 472414 states and 2075820 transitions. [2021-06-05 03:55:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:55:30,416 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 03:55:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:34,048 INFO L225 Difference]: With dead ends: 472414 [2021-06-05 03:55:34,048 INFO L226 Difference]: Without dead ends: 471727 [2021-06-05 03:55:34,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 449.2ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:55:34,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471727 states. [2021-06-05 03:55:45,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471727 to 467183. [2021-06-05 03:55:46,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467183 states, 467182 states have (on average 4.405914611436228) internal successors, (2058364), 467182 states have internal predecessors, (2058364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467183 states to 467183 states and 2058364 transitions. [2021-06-05 03:55:51,008 INFO L78 Accepts]: Start accepts. Automaton has 467183 states and 2058364 transitions. Word has length 33 [2021-06-05 03:55:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:51,008 INFO L482 AbstractCegarLoop]: Abstraction has 467183 states and 2058364 transitions. [2021-06-05 03:55:51,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:51,008 INFO L276 IsEmpty]: Start isEmpty. Operand 467183 states and 2058364 transitions. [2021-06-05 03:55:52,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:55:52,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:52,203 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:52,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:52,409 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:52,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:52,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1888066322, now seen corresponding path program 2 times [2021-06-05 03:55:52,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:52,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596193463] [2021-06-05 03:55:52,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:52,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:52,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596193463] [2021-06-05 03:55:52,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596193463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:52,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054445197] [2021-06-05 03:55:52,590 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:52,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:52,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:52,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:55:52,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:52,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 03:55:52,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:55:52,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:55:52,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:55:52,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 03:55:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:52,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054445197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:52,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:52,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 03:55:52,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151955287] [2021-06-05 03:55:52,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:55:52,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:52,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:55:52,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:55:52,792 INFO L87 Difference]: Start difference. First operand 467183 states and 2058364 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:58,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:58,895 INFO L93 Difference]: Finished difference Result 463049 states and 2040755 transitions. [2021-06-05 03:55:58,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:58,909 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 03:55:58,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:02,516 INFO L225 Difference]: With dead ends: 463049 [2021-06-05 03:56:02,516 INFO L226 Difference]: Without dead ends: 462788 [2021-06-05 03:56:02,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:56:03,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462788 states. [2021-06-05 03:56:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462788 to 461080. [2021-06-05 03:56:13,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461080 states, 461079 states have (on average 4.4107495678614725) internal successors, (2033704), 461079 states have internal predecessors, (2033704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:17,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461080 states to 461080 states and 2033704 transitions. [2021-06-05 03:56:17,701 INFO L78 Accepts]: Start accepts. Automaton has 461080 states and 2033704 transitions. Word has length 33 [2021-06-05 03:56:17,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:17,701 INFO L482 AbstractCegarLoop]: Abstraction has 461080 states and 2033704 transitions. [2021-06-05 03:56:17,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:17,701 INFO L276 IsEmpty]: Start isEmpty. Operand 461080 states and 2033704 transitions. [2021-06-05 03:56:18,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:56:18,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:18,600 INFO L521 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-06-05 03:56:18,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:18,813 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:18,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:18,813 INFO L82 PathProgramCache]: Analyzing trace with hash 223413042, now seen corresponding path program 1 times [2021-06-05 03:56:18,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:18,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684436172] [2021-06-05 03:56:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:19,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:19,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684436172] [2021-06-05 03:56:19,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684436172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:19,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884637862] [2021-06-05 03:56:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:19,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:56:19,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:19,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884637862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:19,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:19,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 03:56:19,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673990309] [2021-06-05 03:56:19,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:56:19,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:19,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:56:19,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:56:19,432 INFO L87 Difference]: Start difference. First operand 461080 states and 2033704 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:25,236 INFO L93 Difference]: Finished difference Result 461705 states and 2035624 transitions. [2021-06-05 03:56:25,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:56:25,253 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 03:56:25,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:28,984 INFO L225 Difference]: With dead ends: 461705 [2021-06-05 03:56:28,984 INFO L226 Difference]: Without dead ends: 461265 [2021-06-05 03:56:28,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 454.7ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:29,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461265 states. [2021-06-05 03:56:39,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461265 to 461051. [2021-06-05 03:56:40,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461051 states, 461050 states have (on average 4.410781910855656) internal successors, (2033591), 461050 states have internal predecessors, (2033591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461051 states to 461051 states and 2033591 transitions. [2021-06-05 03:56:44,231 INFO L78 Accepts]: Start accepts. Automaton has 461051 states and 2033591 transitions. Word has length 33 [2021-06-05 03:56:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:44,231 INFO L482 AbstractCegarLoop]: Abstraction has 461051 states and 2033591 transitions. [2021-06-05 03:56:44,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 461051 states and 2033591 transitions. [2021-06-05 03:56:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:56:46,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:46,124 INFO L521 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-06-05 03:56:46,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 03:56:46,340 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:46,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:46,340 INFO L82 PathProgramCache]: Analyzing trace with hash 220197682, now seen corresponding path program 2 times [2021-06-05 03:56:46,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:46,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182736737] [2021-06-05 03:56:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:46,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:46,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182736737] [2021-06-05 03:56:46,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182736737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:46,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369495428] [2021-06-05 03:56:46,564 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:46,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:46,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:46,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:56:46,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:46,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369495428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:46,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:46,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 03:56:46,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621649110] [2021-06-05 03:56:46,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:56:46,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:46,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:56:46,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:56:46,803 INFO L87 Difference]: Start difference. First operand 461051 states and 2033591 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:52,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:52,184 INFO L93 Difference]: Finished difference Result 466128 states and 2051334 transitions. [2021-06-05 03:56:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:56:52,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 03:56:52,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:55,022 INFO L225 Difference]: With dead ends: 466128 [2021-06-05 03:56:55,022 INFO L226 Difference]: Without dead ends: 465302 [2021-06-05 03:56:55,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 365.6ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:56:56,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465302 states. [2021-06-05 03:57:06,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465302 to 460987. [2021-06-05 03:57:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460987 states, 460986 states have (on average 4.411233746794913) internal successors, (2033517), 460986 states have internal predecessors, (2033517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460987 states to 460987 states and 2033517 transitions. [2021-06-05 03:57:12,348 INFO L78 Accepts]: Start accepts. Automaton has 460987 states and 2033517 transitions. Word has length 33 [2021-06-05 03:57:12,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:12,348 INFO L482 AbstractCegarLoop]: Abstraction has 460987 states and 2033517 transitions. [2021-06-05 03:57:12,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:12,349 INFO L276 IsEmpty]: Start isEmpty. Operand 460987 states and 2033517 transitions. [2021-06-05 03:57:13,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:57:13,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:13,708 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:13,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 03:57:13,924 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:13,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:13,925 INFO L82 PathProgramCache]: Analyzing trace with hash -168380372, now seen corresponding path program 3 times [2021-06-05 03:57:13,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:13,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461200846] [2021-06-05 03:57:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:14,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:14,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461200846] [2021-06-05 03:57:14,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461200846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:14,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079669305] [2021-06-05 03:57:14,082 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:14,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:57:14,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:14,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:57:14,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:14,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 03:57:14,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:57:14,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:57:14,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:57:14,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 03:57:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:14,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079669305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:14,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:14,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 03:57:14,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62815942] [2021-06-05 03:57:14,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:57:14,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:14,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:57:14,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:57:14,231 INFO L87 Difference]: Start difference. First operand 460987 states and 2033517 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:19,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:19,741 INFO L93 Difference]: Finished difference Result 462803 states and 2040315 transitions. [2021-06-05 03:57:19,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:57:19,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 03:57:19,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:21,964 INFO L225 Difference]: With dead ends: 462803 [2021-06-05 03:57:21,964 INFO L226 Difference]: Without dead ends: 462803 [2021-06-05 03:57:21,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:57:23,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462803 states. [2021-06-05 03:57:32,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462803 to 460848. [2021-06-05 03:57:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460848 states, 460847 states have (on average 4.411310044331416) internal successors, (2032939), 460847 states have internal predecessors, (2032939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:38,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460848 states to 460848 states and 2032939 transitions. [2021-06-05 03:57:38,075 INFO L78 Accepts]: Start accepts. Automaton has 460848 states and 2032939 transitions. Word has length 33 [2021-06-05 03:57:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:38,076 INFO L482 AbstractCegarLoop]: Abstraction has 460848 states and 2032939 transitions. [2021-06-05 03:57:38,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 460848 states and 2032939 transitions. [2021-06-05 03:57:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:57:39,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:39,214 INFO L521 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-06-05 03:57:39,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:39,429 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:39,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:39,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2122618956, now seen corresponding path program 3 times [2021-06-05 03:57:39,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:39,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672450934] [2021-06-05 03:57:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:39,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:39,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672450934] [2021-06-05 03:57:39,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672450934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:39,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084003744] [2021-06-05 03:57:39,621 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:39,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:57:39,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:39,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:57:39,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:39,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084003744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:39,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:39,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 03:57:39,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152454740] [2021-06-05 03:57:39,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:57:39,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:39,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:57:39,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:57:39,846 INFO L87 Difference]: Start difference. First operand 460848 states and 2032939 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:40,513 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-06-05 03:57:45,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:45,924 INFO L93 Difference]: Finished difference Result 466776 states and 2054354 transitions. [2021-06-05 03:57:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:57:45,925 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 03:57:45,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:49,854 INFO L225 Difference]: With dead ends: 466776 [2021-06-05 03:57:49,855 INFO L226 Difference]: Without dead ends: 466420 [2021-06-05 03:57:49,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 899.3ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:57:50,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466420 states. [2021-06-05 03:58:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466420 to 460252. [2021-06-05 03:58:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460252 states, 460251 states have (on average 4.412092532118344) internal successors, (2030670), 460251 states have internal predecessors, (2030670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:06,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460252 states to 460252 states and 2030670 transitions. [2021-06-05 03:58:06,246 INFO L78 Accepts]: Start accepts. Automaton has 460252 states and 2030670 transitions. Word has length 33 [2021-06-05 03:58:06,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:06,246 INFO L482 AbstractCegarLoop]: Abstraction has 460252 states and 2030670 transitions. [2021-06-05 03:58:06,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:06,247 INFO L276 IsEmpty]: Start isEmpty. Operand 460252 states and 2030670 transitions. [2021-06-05 03:58:07,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:58:07,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:07,381 INFO L521 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-06-05 03:58:07,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:07,583 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:07,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:07,584 INFO L82 PathProgramCache]: Analyzing trace with hash -2101564566, now seen corresponding path program 2 times [2021-06-05 03:58:07,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:07,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959064127] [2021-06-05 03:58:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:07,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:07,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959064127] [2021-06-05 03:58:07,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959064127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:07,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849645648] [2021-06-05 03:58:07,804 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:07,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:07,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:07,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:58:07,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:08,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849645648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:08,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:08,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 03:58:08,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376824145] [2021-06-05 03:58:08,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:58:08,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:08,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:58:08,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:58:08,033 INFO L87 Difference]: Start difference. First operand 460252 states and 2030670 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:13,452 INFO L93 Difference]: Finished difference Result 460656 states and 2031820 transitions. [2021-06-05 03:58:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:58:13,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 03:58:13,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:16,862 INFO L225 Difference]: With dead ends: 460656 [2021-06-05 03:58:16,862 INFO L226 Difference]: Without dead ends: 460039 [2021-06-05 03:58:16,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460039 states. [2021-06-05 03:58:27,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460039 to 460039. [2021-06-05 03:58:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460039 states, 460038 states have (on average 4.412502880196853) internal successors, (2029919), 460038 states have internal predecessors, (2029919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460039 states to 460039 states and 2029919 transitions. [2021-06-05 03:58:32,640 INFO L78 Accepts]: Start accepts. Automaton has 460039 states and 2029919 transitions. Word has length 33 [2021-06-05 03:58:32,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:32,640 INFO L482 AbstractCegarLoop]: Abstraction has 460039 states and 2029919 transitions. [2021-06-05 03:58:32,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:32,641 INFO L276 IsEmpty]: Start isEmpty. Operand 460039 states and 2029919 transitions. [2021-06-05 03:58:34,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 03:58:34,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:34,521 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:34,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:34,736 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:34,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:34,736 INFO L82 PathProgramCache]: Analyzing trace with hash 874139778, now seen corresponding path program 4 times [2021-06-05 03:58:34,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:34,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356406530] [2021-06-05 03:58:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:34,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:34,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356406530] [2021-06-05 03:58:34,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356406530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:34,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321354104] [2021-06-05 03:58:34,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:34,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:34,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:34,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:58:34,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:35,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 03:58:35,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:58:35,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:58:35,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:58:35,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 03:58:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:35,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321354104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:35,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:35,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 03:58:35,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903014213] [2021-06-05 03:58:35,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:58:35,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:35,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:58:35,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:58:35,103 INFO L87 Difference]: Start difference. First operand 460039 states and 2029919 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:40,238 INFO L93 Difference]: Finished difference Result 463912 states and 2044117 transitions. [2021-06-05 03:58:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:58:40,239 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 03:58:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:43,288 INFO L225 Difference]: With dead ends: 463912 [2021-06-05 03:58:43,288 INFO L226 Difference]: Without dead ends: 463864 [2021-06-05 03:58:43,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 Received shutdown request... [2021-06-05 03:58:43,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463864 states. [2021-06-05 03:58:44,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:44,028 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 03:58:44,030 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 03:58:44,031 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 03:58:44,031 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:58:44 BasicIcfg [2021-06-05 03:58:44,031 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 03:58:44,032 INFO L168 Benchmark]: Toolchain (without parser) took 589885.18 ms. Allocated memory was 367.0 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 346.1 MB in the beginning and 9.0 GB in the end (delta: -8.6 GB). Peak memory consumption was 7.0 GB. Max. memory is 16.0 GB. [2021-06-05 03:58:44,032 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 367.0 MB. Free memory is still 347.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 03:58:44,032 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.87 ms. Allocated memory is still 367.0 MB. Free memory was 345.9 MB in the beginning and 344.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 03:58:44,032 INFO L168 Benchmark]: Boogie Preprocessor took 29.68 ms. Allocated memory is still 367.0 MB. Free memory was 344.5 MB in the beginning and 343.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 03:58:44,032 INFO L168 Benchmark]: RCFGBuilder took 252.69 ms. Allocated memory is still 367.0 MB. Free memory was 343.4 MB in the beginning and 330.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 03:58:44,032 INFO L168 Benchmark]: TraceAbstraction took 589576.62 ms. Allocated memory was 367.0 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 330.1 MB in the beginning and 9.0 GB in the end (delta: -8.6 GB). Peak memory consumption was 7.0 GB. Max. memory is 16.0 GB. [2021-06-05 03:58:44,032 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 367.0 MB. Free memory is still 347.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.87 ms. Allocated memory is still 367.0 MB. Free memory was 345.9 MB in the beginning and 344.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 29.68 ms. Allocated memory is still 367.0 MB. Free memory was 344.5 MB in the beginning and 343.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 252.69 ms. Allocated memory is still 367.0 MB. Free memory was 343.4 MB in the beginning and 330.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 589576.62 ms. Allocated memory was 367.0 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 330.1 MB in the beginning and 9.0 GB in the end (delta: -8.6 GB). Peak memory consumption was 7.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 51 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 589470.5ms, OverallIterations: 89, TraceHistogramMax: 2, EmptinessCheckTime: 21487.9ms, AutomataDifference: 215592.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6180 SDtfs, 24608 SDslu, 39194 SDs, 0 SdLazy, 63585 SolverSat, 2089 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25669.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3971 GetRequests, 1867 SyntacticMatches, 34 SemanticMatches, 2070 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25237 ImplicationChecksByTransitivity, 32497.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=467183occurred in iteration=82, InterpolantAutomatonStates: 1769, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 315079.7ms AutomataMinimizationTime, 89 MinimizatonAttempts, 1450025 StatesRemovedByMinimization, 86 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 363.7ms SsaConstructionTime, 1069.2ms SatisfiabilityAnalysisTime, 15201.0ms InterpolantComputationTime, 4731 NumberOfCodeBlocks, 4719 NumberOfCodeBlocksAsserted, 265 NumberOfCheckSat, 4560 ConstructedInterpolants, 0 QuantifiedInterpolants, 53347 SizeOfPredicates, 473 NumberOfNonLiveVariables, 6125 ConjunctsInSsa, 1018 ConjunctsInUnsatCore, 171 InterpolantComputations, 9 PerfectInterpolantSequences, 471/1403 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