/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 19:22:43,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 19:22:43,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 19:22:43,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 19:22:43,116 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 [2021-02-19 19:22:43,140 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 19:22:43,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 19:22:43,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 19:22:43,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 19:22:43,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 19:22:43,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 19:22:43,143 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 19:22:43,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 19:22:43,143 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 19:22:43,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 19:22:43,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 19:22:43,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 19:22:43,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 19:22:43,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 19:22:43,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 19:22:43,144 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 19:22:43,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 19:22:43,145 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 19:22:43,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 19:22:43,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 19:22:43,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 19:22:43,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 19:22:43,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 19:22:43,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 19:22:43,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 19:22:43,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 19:22:43,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 19:22:43,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 19:22:43,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 19:22:43,146 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 19:22:43,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 19:22:43,146 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 19:22:43,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 19:22:43,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 19:22:43,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 19:22:43,397 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 19:22:43,398 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 19:22:43,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl [2021-02-19 19:22:43,399 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl' [2021-02-19 19:22:43,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 19:22:43,439 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 19:22:43,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 19:22:43,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 19:22:43,440 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 19:22:43,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:22:43" (1/1) ... [2021-02-19 19:22:43,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:22:43" (1/1) ... [2021-02-19 19:22:43,458 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 19:22:43,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 19:22:43,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 19:22:43,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 19:22:43,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:22:43" (1/1) ... [2021-02-19 19:22:43,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:22:43" (1/1) ... [2021-02-19 19:22:43,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:22:43" (1/1) ... [2021-02-19 19:22:43,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:22:43" (1/1) ... [2021-02-19 19:22:43,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:22:43" (1/1) ... [2021-02-19 19:22:43,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:22:43" (1/1) ... [2021-02-19 19:22:43,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:22:43" (1/1) ... [2021-02-19 19:22:43,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 19:22:43,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 19:22:43,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 19:22:43,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 19:22:43,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:22:43" (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 [2021-02-19 19:22:43,526 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 19:22:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 19:22:43,526 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 19:22:43,526 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 19:22:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 19:22:43,526 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 19:22:43,526 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 19:22:43,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 19:22:43,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 19:22:43,527 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 19:22:43,527 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 19:22:43,527 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 19:22:43,527 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 19:22:43,710 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 19:22:43,710 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 19:22:43,711 INFO L202 PluginConnector]: Adding new model queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:22:43 BoogieIcfgContainer [2021-02-19 19:22:43,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 19:22:43,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 19:22:43,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 19:22:43,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 19:22:43,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:22:43" (1/2) ... [2021-02-19 19:22:43,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f06134 and model type queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 07:22:43, skipping insertion in model container [2021-02-19 19:22:43,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:22:43" (2/2) ... [2021-02-19 19:22:43,716 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-3-nl.wvr.bpl [2021-02-19 19:22:43,719 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 19:22:43,719 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 19:22:43,721 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 19:22:43,722 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 19:22:43,745 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 19:22:43,755 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 19:22:43,766 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 19:22:43,767 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 19:22:43,767 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 19:22:43,767 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 19:22:43,767 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 19:22:43,767 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 19:22:43,767 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 19:22:43,767 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 19:22:43,773 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 108 flow [2021-02-19 19:22:43,889 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1015 states, 1013 states have (on average 2.974333662388944) internal successors, (3013), 1014 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:43,894 INFO L276 IsEmpty]: Start isEmpty. Operand has 1015 states, 1013 states have (on average 2.974333662388944) internal successors, (3013), 1014 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:43,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 19:22:43,914 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:22:43,914 INFO L506 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] [2021-02-19 19:22:43,914 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:22:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:22:43,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1491356984, now seen corresponding path program 1 times [2021-02-19 19:22:43,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:22:43,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046757369] [2021-02-19 19:22:43,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:22:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:43,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046757369] [2021-02-19 19:22:43,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:22:44,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 19:22:44,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698672673] [2021-02-19 19:22:44,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 19:22:44,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:22:44,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 19:22:44,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:22:44,014 INFO L87 Difference]: Start difference. First operand has 1015 states, 1013 states have (on average 2.974333662388944) internal successors, (3013), 1014 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:44,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:22:44,046 INFO L93 Difference]: Finished difference Result 1112 states and 3308 transitions. [2021-02-19 19:22:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 19:22:44,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 19:22:44,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:22:44,071 INFO L225 Difference]: With dead ends: 1112 [2021-02-19 19:22:44,071 INFO L226 Difference]: Without dead ends: 1112 [2021-02-19 19:22:44,072 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:22:44,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-02-19 19:22:44,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2021-02-19 19:22:44,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.9774977497749773) internal successors, (3308), 1111 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3308 transitions. [2021-02-19 19:22:44,176 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3308 transitions. Word has length 22 [2021-02-19 19:22:44,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:22:44,176 INFO L480 AbstractCegarLoop]: Abstraction has 1112 states and 3308 transitions. [2021-02-19 19:22:44,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:44,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3308 transitions. [2021-02-19 19:22:44,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:22:44,182 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:22:44,182 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:22:44,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 19:22:44,183 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:22:44,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:22:44,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1162268980, now seen corresponding path program 1 times [2021-02-19 19:22:44,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:22:44,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978149653] [2021-02-19 19:22:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:22:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:44,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978149653] [2021-02-19 19:22:44,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:22:44,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 19:22:44,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039024587] [2021-02-19 19:22:44,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 19:22:44,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:22:44,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 19:22:44,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:22:44,252 INFO L87 Difference]: Start difference. First operand 1112 states and 3308 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:44,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:22:44,270 INFO L93 Difference]: Finished difference Result 1165 states and 3465 transitions. [2021-02-19 19:22:44,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 19:22:44,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:22:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:22:44,276 INFO L225 Difference]: With dead ends: 1165 [2021-02-19 19:22:44,276 INFO L226 Difference]: Without dead ends: 1165 [2021-02-19 19:22:44,276 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:22:44,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-02-19 19:22:44,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1165. [2021-02-19 19:22:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.9768041237113403) internal successors, (3465), 1164 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3465 transitions. [2021-02-19 19:22:44,301 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3465 transitions. Word has length 28 [2021-02-19 19:22:44,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:22:44,301 INFO L480 AbstractCegarLoop]: Abstraction has 1165 states and 3465 transitions. [2021-02-19 19:22:44,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:44,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3465 transitions. [2021-02-19 19:22:44,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:22:44,304 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:22:44,304 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:22:44,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 19:22:44,304 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:22:44,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:22:44,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1896834830, now seen corresponding path program 2 times [2021-02-19 19:22:44,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:22:44,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729828903] [2021-02-19 19:22:44,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:22:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:22:44,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729828903] [2021-02-19 19:22:44,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:22:44,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 19:22:44,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508434690] [2021-02-19 19:22:44,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 19:22:44,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:22:44,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 19:22:44,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:22:44,330 INFO L87 Difference]: Start difference. First operand 1165 states and 3465 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:44,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:22:44,343 INFO L93 Difference]: Finished difference Result 1281 states and 3812 transitions. [2021-02-19 19:22:44,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 19:22:44,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:22:44,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:22:44,348 INFO L225 Difference]: With dead ends: 1281 [2021-02-19 19:22:44,348 INFO L226 Difference]: Without dead ends: 1281 [2021-02-19 19:22:44,348 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:22:44,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-02-19 19:22:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2021-02-19 19:22:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 2.978125) internal successors, (3812), 1280 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:44,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 3812 transitions. [2021-02-19 19:22:44,372 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 3812 transitions. Word has length 28 [2021-02-19 19:22:44,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:22:44,373 INFO L480 AbstractCegarLoop]: Abstraction has 1281 states and 3812 transitions. [2021-02-19 19:22:44,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:44,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 3812 transitions. [2021-02-19 19:22:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:22:44,376 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:22:44,376 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:22:44,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 19:22:44,376 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:22:44,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:22:44,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1983929400, now seen corresponding path program 1 times [2021-02-19 19:22:44,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:22:44,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26153340] [2021-02-19 19:22:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:22:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:44,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26153340] [2021-02-19 19:22:44,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582631264] [2021-02-19 19:22:44,670 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 [2021-02-19 19:22:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:44,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:22:44,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:22:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:45,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:22:45,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:22:45,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172256168] [2021-02-19 19:22:45,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:22:45,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:22:45,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:22:45,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:22:45,021 INFO L87 Difference]: Start difference. First operand 1281 states and 3812 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:22:45,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:22:45,534 INFO L93 Difference]: Finished difference Result 2269 states and 6580 transitions. [2021-02-19 19:22:45,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:22:45,535 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:22:45,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:22:45,543 INFO L225 Difference]: With dead ends: 2269 [2021-02-19 19:22:45,543 INFO L226 Difference]: Without dead ends: 2254 [2021-02-19 19:22:45,543 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:22:45,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-02-19 19:22:45,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1446. [2021-02-19 19:22:45,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 2.9577854671280277) internal successors, (4274), 1445 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4274 transitions. [2021-02-19 19:22:45,576 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4274 transitions. Word has length 33 [2021-02-19 19:22:45,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:22:45,576 INFO L480 AbstractCegarLoop]: Abstraction has 1446 states and 4274 transitions. [2021-02-19 19:22:45,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:22:45,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4274 transitions. [2021-02-19 19:22:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:22:45,581 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:22:45,581 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:22:45,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:45,788 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:22:45,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:22:45,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1876479032, now seen corresponding path program 2 times [2021-02-19 19:22:45,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:22:45,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386434459] [2021-02-19 19:22:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:22:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:46,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386434459] [2021-02-19 19:22:46,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034107209] [2021-02-19 19:22:46,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:46,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:22:46,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:22:46,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:22:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:22:46,219 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 5 treesize of output 3 [2021-02-19 19:22:46,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:22:46,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:22:46,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:22:46,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-02-19 19:22:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:46,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:22:46,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:22:46,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742021126] [2021-02-19 19:22:46,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:22:46,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:22:46,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:22:46,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:22:46,387 INFO L87 Difference]: Start difference. First operand 1446 states and 4274 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:22:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:22:47,259 INFO L93 Difference]: Finished difference Result 2068 states and 5919 transitions. [2021-02-19 19:22:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:22:47,259 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:22:47,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:22:47,266 INFO L225 Difference]: With dead ends: 2068 [2021-02-19 19:22:47,266 INFO L226 Difference]: Without dead ends: 2053 [2021-02-19 19:22:47,266 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:22:47,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-02-19 19:22:47,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1458. [2021-02-19 19:22:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 2.960878517501716) internal successors, (4314), 1457 states have internal predecessors, (4314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:47,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 4314 transitions. [2021-02-19 19:22:47,298 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 4314 transitions. Word has length 33 [2021-02-19 19:22:47,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:22:47,298 INFO L480 AbstractCegarLoop]: Abstraction has 1458 states and 4314 transitions. [2021-02-19 19:22:47,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:22:47,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 4314 transitions. [2021-02-19 19:22:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:22:47,301 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:22:47,301 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:22:47,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:47,514 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:22:47,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:22:47,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1542305800, now seen corresponding path program 3 times [2021-02-19 19:22:47,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:22:47,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581271232] [2021-02-19 19:22:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:22:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:47,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581271232] [2021-02-19 19:22:47,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988969939] [2021-02-19 19:22:47,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:47,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:22:47,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:22:47,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:22:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:22:47,861 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 5 treesize of output 3 [2021-02-19 19:22:47,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:22:47,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:22:47,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:22:47,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-02-19 19:22:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:48,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:22:48,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:22:48,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889637051] [2021-02-19 19:22:48,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:22:48,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:22:48,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:22:48,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:22:48,006 INFO L87 Difference]: Start difference. First operand 1458 states and 4314 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:22:48,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:22:48,659 INFO L93 Difference]: Finished difference Result 2308 states and 6666 transitions. [2021-02-19 19:22:48,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:22:48,659 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:22:48,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:22:48,667 INFO L225 Difference]: With dead ends: 2308 [2021-02-19 19:22:48,667 INFO L226 Difference]: Without dead ends: 2289 [2021-02-19 19:22:48,667 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:22:48,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-02-19 19:22:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1458. [2021-02-19 19:22:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 2.959505833905285) internal successors, (4312), 1457 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 4312 transitions. [2021-02-19 19:22:48,693 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 4312 transitions. Word has length 33 [2021-02-19 19:22:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:22:48,694 INFO L480 AbstractCegarLoop]: Abstraction has 1458 states and 4312 transitions. [2021-02-19 19:22:48,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:22:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 4312 transitions. [2021-02-19 19:22:48,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:22:48,696 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:22:48,696 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:22:48,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:48,912 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:22:48,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:22:48,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1684020940, now seen corresponding path program 4 times [2021-02-19 19:22:48,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:22:48,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424112585] [2021-02-19 19:22:48,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:22:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:49,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424112585] [2021-02-19 19:22:49,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644165535] [2021-02-19 19:22:49,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:49,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:22:49,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:22:49,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:22:49,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:22:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:49,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:22:49,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:22:49,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586870144] [2021-02-19 19:22:49,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:22:49,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:22:49,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:22:49,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:22:49,352 INFO L87 Difference]: Start difference. First operand 1458 states and 4312 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:22:50,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:22:50,043 INFO L93 Difference]: Finished difference Result 2568 states and 7386 transitions. [2021-02-19 19:22:50,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:22:50,043 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:22:50,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:22:50,051 INFO L225 Difference]: With dead ends: 2568 [2021-02-19 19:22:50,052 INFO L226 Difference]: Without dead ends: 2553 [2021-02-19 19:22:50,052 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:22:50,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-02-19 19:22:50,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1477. [2021-02-19 19:22:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.959349593495935) internal successors, (4368), 1476 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4368 transitions. [2021-02-19 19:22:50,085 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4368 transitions. Word has length 33 [2021-02-19 19:22:50,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:22:50,086 INFO L480 AbstractCegarLoop]: Abstraction has 1477 states and 4368 transitions. [2021-02-19 19:22:50,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:22:50,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4368 transitions. [2021-02-19 19:22:50,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:22:50,088 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:22:50,088 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:22:50,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:50,297 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:22:50,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:22:50,298 INFO L82 PathProgramCache]: Analyzing trace with hash 400873480, now seen corresponding path program 5 times [2021-02-19 19:22:50,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:22:50,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858882031] [2021-02-19 19:22:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:22:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:50,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858882031] [2021-02-19 19:22:50,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959779638] [2021-02-19 19:22:50,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:50,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:22:50,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:22:50,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:22:50,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:22:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:50,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:22:50,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:22:50,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505000378] [2021-02-19 19:22:50,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:22:50,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:22:50,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:22:50,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:22:50,699 INFO L87 Difference]: Start difference. First operand 1477 states and 4368 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:22:51,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:22:51,254 INFO L93 Difference]: Finished difference Result 2510 states and 7227 transitions. [2021-02-19 19:22:51,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:22:51,255 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:22:51,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:22:51,263 INFO L225 Difference]: With dead ends: 2510 [2021-02-19 19:22:51,263 INFO L226 Difference]: Without dead ends: 2495 [2021-02-19 19:22:51,268 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:22:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-02-19 19:22:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 1477. [2021-02-19 19:22:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.959349593495935) internal successors, (4368), 1476 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4368 transitions. [2021-02-19 19:22:51,294 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4368 transitions. Word has length 33 [2021-02-19 19:22:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:22:51,294 INFO L480 AbstractCegarLoop]: Abstraction has 1477 states and 4368 transitions. [2021-02-19 19:22:51,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:22:51,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4368 transitions. [2021-02-19 19:22:51,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:22:51,297 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:22:51,297 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:22:51,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:51,510 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:22:51,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:22:51,510 INFO L82 PathProgramCache]: Analyzing trace with hash 622752712, now seen corresponding path program 6 times [2021-02-19 19:22:51,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:22:51,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823736523] [2021-02-19 19:22:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:22:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:51,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823736523] [2021-02-19 19:22:51,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340889045] [2021-02-19 19:22:51,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:51,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 19:22:51,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:22:51,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 19:22:51,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:22:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:51,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:22:51,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:22:51,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540743577] [2021-02-19 19:22:51,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:22:51,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:22:51,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:22:51,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:22:51,922 INFO L87 Difference]: Start difference. First operand 1477 states and 4368 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:22:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:22:52,356 INFO L93 Difference]: Finished difference Result 2484 states and 7184 transitions. [2021-02-19 19:22:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:22:52,357 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:22:52,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:22:52,365 INFO L225 Difference]: With dead ends: 2484 [2021-02-19 19:22:52,365 INFO L226 Difference]: Without dead ends: 2469 [2021-02-19 19:22:52,365 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:22:52,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-02-19 19:22:52,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1561. [2021-02-19 19:22:52,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.943589743589744) internal successors, (4592), 1560 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4592 transitions. [2021-02-19 19:22:52,405 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4592 transitions. Word has length 33 [2021-02-19 19:22:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:22:52,405 INFO L480 AbstractCegarLoop]: Abstraction has 1561 states and 4592 transitions. [2021-02-19 19:22:52,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:22:52,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4592 transitions. [2021-02-19 19:22:52,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:22:52,408 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:22:52,408 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:22:52,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:52,624 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:22:52,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:22:52,624 INFO L82 PathProgramCache]: Analyzing trace with hash 648821588, now seen corresponding path program 7 times [2021-02-19 19:22:52,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:22:52,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378917560] [2021-02-19 19:22:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:22:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:52,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378917560] [2021-02-19 19:22:52,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99793401] [2021-02-19 19:22:52,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:52,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:22:52,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:22:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:53,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:22:53,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:22:53,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202223568] [2021-02-19 19:22:53,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:22:53,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:22:53,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:22:53,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:22:53,003 INFO L87 Difference]: Start difference. First operand 1561 states and 4592 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:22:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:22:53,778 INFO L93 Difference]: Finished difference Result 2207 states and 6308 transitions. [2021-02-19 19:22:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:22:53,778 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:22:53,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:22:53,782 INFO L225 Difference]: With dead ends: 2207 [2021-02-19 19:22:53,782 INFO L226 Difference]: Without dead ends: 2192 [2021-02-19 19:22:53,783 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:22:53,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-02-19 19:22:53,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1624. [2021-02-19 19:22:53,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 2.9457794208256316) internal successors, (4781), 1623 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 4781 transitions. [2021-02-19 19:22:53,818 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 4781 transitions. Word has length 33 [2021-02-19 19:22:53,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:22:53,818 INFO L480 AbstractCegarLoop]: Abstraction has 1624 states and 4781 transitions. [2021-02-19 19:22:53,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:22:53,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 4781 transitions. [2021-02-19 19:22:53,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:22:53,821 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:22:53,821 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:22:54,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 19:22:54,038 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:22:54,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:22:54,038 INFO L82 PathProgramCache]: Analyzing trace with hash 420062744, now seen corresponding path program 8 times [2021-02-19 19:22:54,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:22:54,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940593108] [2021-02-19 19:22:54,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:22:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:54,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940593108] [2021-02-19 19:22:54,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040407074] [2021-02-19 19:22:54,207 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 [2021-02-19 19:22:54,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:22:54,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:22:54,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:22:54,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:22:54,347 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 5 treesize of output 3 [2021-02-19 19:22:54,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:22:54,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:22:54,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:22:54,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-02-19 19:22:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:54,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:22:54,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:22:54,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455567242] [2021-02-19 19:22:54,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:22:54,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:22:54,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:22:54,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:22:54,493 INFO L87 Difference]: Start difference. First operand 1624 states and 4781 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:22:54,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:22:54,974 INFO L93 Difference]: Finished difference Result 2484 states and 7152 transitions. [2021-02-19 19:22:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:22:54,975 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:22:54,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:22:54,979 INFO L225 Difference]: With dead ends: 2484 [2021-02-19 19:22:54,979 INFO L226 Difference]: Without dead ends: 2469 [2021-02-19 19:22:54,979 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:22:54,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-02-19 19:22:55,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1666. [2021-02-19 19:22:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 2.926126126126126) internal successors, (4872), 1665 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 4872 transitions. [2021-02-19 19:22:55,030 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 4872 transitions. Word has length 33 [2021-02-19 19:22:55,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:22:55,031 INFO L480 AbstractCegarLoop]: Abstraction has 1666 states and 4872 transitions. [2021-02-19 19:22:55,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:22:55,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 4872 transitions. [2021-02-19 19:22:55,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:22:55,034 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:22:55,034 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:22:55,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-02-19 19:22:55,250 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:22:55,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:22:55,250 INFO L82 PathProgramCache]: Analyzing trace with hash -526669056, now seen corresponding path program 9 times [2021-02-19 19:22:55,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:22:55,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043135499] [2021-02-19 19:22:55,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:22:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:55,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043135499] [2021-02-19 19:22:55,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31370122] [2021-02-19 19:22:55,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:55,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:22:55,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:22:55,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:22:55,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:22:55,507 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 5 treesize of output 3 [2021-02-19 19:22:55,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:22:55,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:22:55,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:22:55,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-02-19 19:22:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:55,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:22:55,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:22:55,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749749033] [2021-02-19 19:22:55,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:22:55,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:22:55,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:22:55,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:22:55,648 INFO L87 Difference]: Start difference. First operand 1666 states and 4872 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:22:56,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:22:56,184 INFO L93 Difference]: Finished difference Result 2668 states and 7671 transitions. [2021-02-19 19:22:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:22:56,184 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:22:56,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:22:56,188 INFO L225 Difference]: With dead ends: 2668 [2021-02-19 19:22:56,188 INFO L226 Difference]: Without dead ends: 2653 [2021-02-19 19:22:56,188 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:22:56,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2653 states. [2021-02-19 19:22:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2653 to 1708. [2021-02-19 19:22:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.919742237844171) internal successors, (4984), 1707 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 4984 transitions. [2021-02-19 19:22:56,215 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 4984 transitions. Word has length 33 [2021-02-19 19:22:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:22:56,215 INFO L480 AbstractCegarLoop]: Abstraction has 1708 states and 4984 transitions. [2021-02-19 19:22:56,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:22:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 4984 transitions. [2021-02-19 19:22:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:22:56,219 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:22:56,219 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:22:56,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:56,432 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:22:56,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:22:56,432 INFO L82 PathProgramCache]: Analyzing trace with hash -681106574, now seen corresponding path program 10 times [2021-02-19 19:22:56,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:22:56,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355614911] [2021-02-19 19:22:56,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:22:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:56,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355614911] [2021-02-19 19:22:56,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475277290] [2021-02-19 19:22:56,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:56,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:22:56,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:22:56,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:22:56,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:22:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:56,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:22:56,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:22:56,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744981278] [2021-02-19 19:22:56,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:22:56,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:22:56,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:22:56,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:22:56,790 INFO L87 Difference]: Start difference. First operand 1708 states and 4984 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:22:57,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:22:57,218 INFO L93 Difference]: Finished difference Result 2631 states and 7576 transitions. [2021-02-19 19:22:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:22:57,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:22:57,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:22:57,223 INFO L225 Difference]: With dead ends: 2631 [2021-02-19 19:22:57,223 INFO L226 Difference]: Without dead ends: 2616 [2021-02-19 19:22:57,223 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:22:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-02-19 19:22:57,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 1708. [2021-02-19 19:22:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.919742237844171) internal successors, (4984), 1707 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 4984 transitions. [2021-02-19 19:22:57,250 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 4984 transitions. Word has length 33 [2021-02-19 19:22:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:22:57,250 INFO L480 AbstractCegarLoop]: Abstraction has 1708 states and 4984 transitions. [2021-02-19 19:22:57,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:22:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 4984 transitions. [2021-02-19 19:22:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:22:57,252 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:22:57,253 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:22:57,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:57,468 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:22:57,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:22:57,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2090473352, now seen corresponding path program 11 times [2021-02-19 19:22:57,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:22:57,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554544860] [2021-02-19 19:22:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:22:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:57,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554544860] [2021-02-19 19:22:57,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627953686] [2021-02-19 19:22:57,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:57,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:22:57,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:22:57,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:22:57,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:22:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:57,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:22:57,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:22:57,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427978243] [2021-02-19 19:22:57,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:22:57,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:22:57,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:22:57,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:22:57,867 INFO L87 Difference]: Start difference. First operand 1708 states and 4984 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:22:58,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:22:58,565 INFO L93 Difference]: Finished difference Result 2160 states and 6221 transitions. [2021-02-19 19:22:58,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:22:58,565 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:22:58,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:22:58,569 INFO L225 Difference]: With dead ends: 2160 [2021-02-19 19:22:58,569 INFO L226 Difference]: Without dead ends: 2145 [2021-02-19 19:22:58,569 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:22:58,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-02-19 19:22:58,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1734. [2021-02-19 19:22:58,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.928447778418927) internal successors, (5075), 1733 states have internal predecessors, (5075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:58,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5075 transitions. [2021-02-19 19:22:58,592 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5075 transitions. Word has length 33 [2021-02-19 19:22:58,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:22:58,593 INFO L480 AbstractCegarLoop]: Abstraction has 1734 states and 5075 transitions. [2021-02-19 19:22:58,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:22:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5075 transitions. [2021-02-19 19:22:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:22:58,595 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:22:58,595 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:22:58,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-02-19 19:22:58,809 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:22:58,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:22:58,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1214290888, now seen corresponding path program 12 times [2021-02-19 19:22:58,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:22:58,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024562881] [2021-02-19 19:22:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:22:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:22:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:58,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024562881] [2021-02-19 19:22:58,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506082523] [2021-02-19 19:22:58,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:22:58,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 19:22:58,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:22:58,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:22:58,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:22:59,084 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 5 treesize of output 3 [2021-02-19 19:22:59,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:22:59,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:22:59,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:22:59,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:22:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:22:59,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:22:59,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:22:59,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725135159] [2021-02-19 19:22:59,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:22:59,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:22:59,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:22:59,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:22:59,226 INFO L87 Difference]: Start difference. First operand 1734 states and 5075 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:22:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:22:59,887 INFO L93 Difference]: Finished difference Result 2188 states and 6280 transitions. [2021-02-19 19:22:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:22:59,888 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:22:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:22:59,891 INFO L225 Difference]: With dead ends: 2188 [2021-02-19 19:22:59,891 INFO L226 Difference]: Without dead ends: 2169 [2021-02-19 19:22:59,891 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:22:59,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-02-19 19:22:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1730. [2021-02-19 19:22:59,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.925968768074031) internal successors, (5059), 1729 states have internal predecessors, (5059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:22:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5059 transitions. [2021-02-19 19:22:59,922 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5059 transitions. Word has length 33 [2021-02-19 19:22:59,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:22:59,922 INFO L480 AbstractCegarLoop]: Abstraction has 1730 states and 5059 transitions. [2021-02-19 19:22:59,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:22:59,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5059 transitions. [2021-02-19 19:22:59,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:22:59,924 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:22:59,924 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:00,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 19:23:00,139 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:00,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:00,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1836629048, now seen corresponding path program 13 times [2021-02-19 19:23:00,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:00,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004390785] [2021-02-19 19:23:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:00,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004390785] [2021-02-19 19:23:00,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923010009] [2021-02-19 19:23:00,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:23:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:00,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:00,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:00,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:00,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:23:00,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334118480] [2021-02-19 19:23:00,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:23:00,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:00,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:23:00,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:23:00,510 INFO L87 Difference]: Start difference. First operand 1730 states and 5059 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:23:01,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:01,262 INFO L93 Difference]: Finished difference Result 2225 states and 6381 transitions. [2021-02-19 19:23:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:23:01,263 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:01,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:01,265 INFO L225 Difference]: With dead ends: 2225 [2021-02-19 19:23:01,265 INFO L226 Difference]: Without dead ends: 2210 [2021-02-19 19:23:01,265 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:23:01,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-02-19 19:23:01,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1751. [2021-02-19 19:23:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 2.934857142857143) internal successors, (5136), 1750 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 5136 transitions. [2021-02-19 19:23:01,294 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 5136 transitions. Word has length 33 [2021-02-19 19:23:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:01,294 INFO L480 AbstractCegarLoop]: Abstraction has 1751 states and 5136 transitions. [2021-02-19 19:23:01,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:23:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 5136 transitions. [2021-02-19 19:23:01,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:01,296 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:01,296 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:01,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 19:23:01,510 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:01,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:01,511 INFO L82 PathProgramCache]: Analyzing trace with hash -72959118, now seen corresponding path program 14 times [2021-02-19 19:23:01,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:01,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173838710] [2021-02-19 19:23:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:01,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173838710] [2021-02-19 19:23:01,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142456933] [2021-02-19 19:23:01,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:01,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:01,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:01,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:23:01,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:01,765 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 5 treesize of output 3 [2021-02-19 19:23:01,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:01,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:01,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:23:01,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:23:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:01,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:01,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:23:01,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617193612] [2021-02-19 19:23:01,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:23:01,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:01,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:23:01,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:01,911 INFO L87 Difference]: Start difference. First operand 1751 states and 5136 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:02,531 INFO L93 Difference]: Finished difference Result 2279 states and 6491 transitions. [2021-02-19 19:23:02,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:23:02,531 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:23:02,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:02,534 INFO L225 Difference]: With dead ends: 2279 [2021-02-19 19:23:02,534 INFO L226 Difference]: Without dead ends: 2264 [2021-02-19 19:23:02,534 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:23:02,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-02-19 19:23:02,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1730. [2021-02-19 19:23:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.925968768074031) internal successors, (5059), 1729 states have internal predecessors, (5059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:02,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5059 transitions. [2021-02-19 19:23:02,554 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5059 transitions. Word has length 33 [2021-02-19 19:23:02,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:02,554 INFO L480 AbstractCegarLoop]: Abstraction has 1730 states and 5059 transitions. [2021-02-19 19:23:02,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:02,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5059 transitions. [2021-02-19 19:23:02,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:02,556 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:02,557 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:02,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:02,771 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:02,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:02,771 INFO L82 PathProgramCache]: Analyzing trace with hash -12662776, now seen corresponding path program 15 times [2021-02-19 19:23:02,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:02,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141583764] [2021-02-19 19:23:02,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:02,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141583764] [2021-02-19 19:23:02,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305880524] [2021-02-19 19:23:02,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:02,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:23:02,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:02,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 19:23:02,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:03,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:03,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:23:03,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8820669] [2021-02-19 19:23:03,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:23:03,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:03,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:23:03,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:03,129 INFO L87 Difference]: Start difference. First operand 1730 states and 5059 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:03,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:03,461 INFO L93 Difference]: Finished difference Result 2313 states and 6721 transitions. [2021-02-19 19:23:03,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:23:03,462 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:23:03,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:03,464 INFO L225 Difference]: With dead ends: 2313 [2021-02-19 19:23:03,464 INFO L226 Difference]: Without dead ends: 2294 [2021-02-19 19:23:03,464 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:23:03,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-02-19 19:23:03,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1752. [2021-02-19 19:23:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:03,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-02-19 19:23:03,484 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-02-19 19:23:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:03,484 INFO L480 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-02-19 19:23:03,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:03,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-02-19 19:23:03,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:03,486 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:03,486 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:03,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 19:23:03,701 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:03,701 INFO L82 PathProgramCache]: Analyzing trace with hash -620100536, now seen corresponding path program 16 times [2021-02-19 19:23:03,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:03,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346256852] [2021-02-19 19:23:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:03,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346256852] [2021-02-19 19:23:03,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543419764] [2021-02-19 19:23:03,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:23:03,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:23:03,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:03,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:03,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:04,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:04,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:23:04,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646863501] [2021-02-19 19:23:04,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:23:04,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:04,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:23:04,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:23:04,024 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:23:04,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:04,396 INFO L93 Difference]: Finished difference Result 2339 states and 6772 transitions. [2021-02-19 19:23:04,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:23:04,396 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:04,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:04,398 INFO L225 Difference]: With dead ends: 2339 [2021-02-19 19:23:04,398 INFO L226 Difference]: Without dead ends: 2324 [2021-02-19 19:23:04,399 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:23:04,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-02-19 19:23:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 1752. [2021-02-19 19:23:04,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-02-19 19:23:04,419 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-02-19 19:23:04,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:04,419 INFO L480 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-02-19 19:23:04,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:23:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-02-19 19:23:04,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:04,421 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:04,422 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:04,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:04,623 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:04,624 INFO L82 PathProgramCache]: Analyzing trace with hash -82937764, now seen corresponding path program 17 times [2021-02-19 19:23:04,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:04,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713994153] [2021-02-19 19:23:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:04,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713994153] [2021-02-19 19:23:04,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600845192] [2021-02-19 19:23:04,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:04,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:04,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:04,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:04,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:04,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:04,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:23:04,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146097834] [2021-02-19 19:23:04,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:23:04,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:04,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:23:04,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:23:04,961 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:23:05,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:05,841 INFO L93 Difference]: Finished difference Result 2321 states and 6657 transitions. [2021-02-19 19:23:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:23:05,842 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:05,846 INFO L225 Difference]: With dead ends: 2321 [2021-02-19 19:23:05,846 INFO L226 Difference]: Without dead ends: 2306 [2021-02-19 19:23:05,847 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:23:05,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-02-19 19:23:05,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1760. [2021-02-19 19:23:05,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 2.922114837976123) internal successors, (5140), 1759 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:05,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 5140 transitions. [2021-02-19 19:23:05,883 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 5140 transitions. Word has length 33 [2021-02-19 19:23:05,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:05,883 INFO L480 AbstractCegarLoop]: Abstraction has 1760 states and 5140 transitions. [2021-02-19 19:23:05,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:23:05,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 5140 transitions. [2021-02-19 19:23:05,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:05,888 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:05,888 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:06,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:06,103 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:06,103 INFO L82 PathProgramCache]: Analyzing trace with hash -959120228, now seen corresponding path program 18 times [2021-02-19 19:23:06,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:06,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709594318] [2021-02-19 19:23:06,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:06,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709594318] [2021-02-19 19:23:06,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243364694] [2021-02-19 19:23:06,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:06,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 19:23:06,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:06,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:23:06,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:06,337 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 5 treesize of output 3 [2021-02-19 19:23:06,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:06,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:06,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:23:06,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:23:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:06,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:06,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:23:06,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063599015] [2021-02-19 19:23:06,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:23:06,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:06,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:23:06,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:06,490 INFO L87 Difference]: Start difference. First operand 1760 states and 5140 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:07,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:07,064 INFO L93 Difference]: Finished difference Result 2573 states and 7435 transitions. [2021-02-19 19:23:07,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:23:07,066 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:23:07,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:07,069 INFO L225 Difference]: With dead ends: 2573 [2021-02-19 19:23:07,069 INFO L226 Difference]: Without dead ends: 2554 [2021-02-19 19:23:07,069 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:23:07,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-02-19 19:23:07,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 1752. [2021-02-19 19:23:07,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:07,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-02-19 19:23:07,097 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-02-19 19:23:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:07,097 INFO L480 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-02-19 19:23:07,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:07,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-02-19 19:23:07,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:07,099 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:07,099 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:07,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 19:23:07,313 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:07,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2055933132, now seen corresponding path program 19 times [2021-02-19 19:23:07,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:07,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689758985] [2021-02-19 19:23:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:07,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689758985] [2021-02-19 19:23:07,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873817883] [2021-02-19 19:23:07,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:07,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:07,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:07,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:07,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:23:07,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200066195] [2021-02-19 19:23:07,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:23:07,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:07,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:23:07,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:23:07,638 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:23:08,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:08,517 INFO L93 Difference]: Finished difference Result 2455 states and 6989 transitions. [2021-02-19 19:23:08,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:23:08,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:08,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:08,520 INFO L225 Difference]: With dead ends: 2455 [2021-02-19 19:23:08,520 INFO L226 Difference]: Without dead ends: 2440 [2021-02-19 19:23:08,520 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:23:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-02-19 19:23:08,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1794. [2021-02-19 19:23:08,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 2.92526491912995) internal successors, (5245), 1793 states have internal predecessors, (5245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:08,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 5245 transitions. [2021-02-19 19:23:08,539 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 5245 transitions. Word has length 33 [2021-02-19 19:23:08,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:08,539 INFO L480 AbstractCegarLoop]: Abstraction has 1794 states and 5245 transitions. [2021-02-19 19:23:08,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:23:08,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 5245 transitions. [2021-02-19 19:23:08,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:08,542 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:08,542 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:08,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:08,746 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:08,746 INFO L82 PathProgramCache]: Analyzing trace with hash -475364234, now seen corresponding path program 20 times [2021-02-19 19:23:08,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:08,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098393569] [2021-02-19 19:23:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:08,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098393569] [2021-02-19 19:23:08,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523557478] [2021-02-19 19:23:08,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:08,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:08,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:08,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:23:08,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:08,981 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 5 treesize of output 3 [2021-02-19 19:23:08,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:08,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:08,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:23:08,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:23:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:09,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:09,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:23:09,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969438559] [2021-02-19 19:23:09,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:23:09,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:09,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:23:09,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:09,117 INFO L87 Difference]: Start difference. First operand 1794 states and 5245 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:09,710 INFO L93 Difference]: Finished difference Result 2707 states and 7767 transitions. [2021-02-19 19:23:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:23:09,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:23:09,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:09,713 INFO L225 Difference]: With dead ends: 2707 [2021-02-19 19:23:09,713 INFO L226 Difference]: Without dead ends: 2692 [2021-02-19 19:23:09,713 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:23:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2021-02-19 19:23:09,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 1752. [2021-02-19 19:23:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:09,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-02-19 19:23:09,733 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-02-19 19:23:09,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:09,733 INFO L480 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-02-19 19:23:09,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:09,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-02-19 19:23:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:09,735 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:09,735 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:09,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 19:23:09,940 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:09,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:09,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1021062486, now seen corresponding path program 21 times [2021-02-19 19:23:09,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:09,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919035043] [2021-02-19 19:23:09,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:10,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919035043] [2021-02-19 19:23:10,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383940929] [2021-02-19 19:23:10,071 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) [2021-02-19 19:23:10,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:23:10,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:10,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:23:10,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:10,191 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 5 treesize of output 3 [2021-02-19 19:23:10,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:10,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:10,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:23:10,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:23:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:10,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:10,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:23:10,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913939616] [2021-02-19 19:23:10,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:23:10,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:10,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:23:10,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:10,341 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:11,240 INFO L93 Difference]: Finished difference Result 2406 states and 6882 transitions. [2021-02-19 19:23:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:23:11,241 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:23:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:11,243 INFO L225 Difference]: With dead ends: 2406 [2021-02-19 19:23:11,243 INFO L226 Difference]: Without dead ends: 2391 [2021-02-19 19:23:11,244 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:23:11,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-02-19 19:23:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1756. [2021-02-19 19:23:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 2.921937321937322) internal successors, (5128), 1755 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 5128 transitions. [2021-02-19 19:23:11,264 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 5128 transitions. Word has length 33 [2021-02-19 19:23:11,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:11,264 INFO L480 AbstractCegarLoop]: Abstraction has 1756 states and 5128 transitions. [2021-02-19 19:23:11,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:11,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 5128 transitions. [2021-02-19 19:23:11,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:11,266 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:11,267 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:11,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 19:23:11,471 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:11,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:11,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1897244950, now seen corresponding path program 22 times [2021-02-19 19:23:11,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:11,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387826580] [2021-02-19 19:23:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:11,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387826580] [2021-02-19 19:23:11,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465895353] [2021-02-19 19:23:11,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:11,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:23:11,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:11,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:11,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:11,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:11,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:23:11,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644538910] [2021-02-19 19:23:11,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:23:11,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:11,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:23:11,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:23:11,786 INFO L87 Difference]: Start difference. First operand 1756 states and 5128 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:23:12,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:12,415 INFO L93 Difference]: Finished difference Result 2707 states and 7778 transitions. [2021-02-19 19:23:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:23:12,416 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:12,419 INFO L225 Difference]: With dead ends: 2707 [2021-02-19 19:23:12,419 INFO L226 Difference]: Without dead ends: 2688 [2021-02-19 19:23:12,419 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:23:12,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-02-19 19:23:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 1744. [2021-02-19 19:23:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.919104991394148) internal successors, (5088), 1743 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 5088 transitions. [2021-02-19 19:23:12,439 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 5088 transitions. Word has length 33 [2021-02-19 19:23:12,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:12,439 INFO L480 AbstractCegarLoop]: Abstraction has 1744 states and 5088 transitions. [2021-02-19 19:23:12,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:23:12,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 5088 transitions. [2021-02-19 19:23:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:12,441 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:12,441 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:12,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:12,649 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:12,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:12,649 INFO L82 PathProgramCache]: Analyzing trace with hash -27736056, now seen corresponding path program 23 times [2021-02-19 19:23:12,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:12,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800816623] [2021-02-19 19:23:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:12,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800816623] [2021-02-19 19:23:12,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2943960] [2021-02-19 19:23:12,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:12,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:12,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:12,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:12,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:12,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:12,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:23:12,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821445948] [2021-02-19 19:23:12,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:23:12,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:12,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:23:12,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:23:12,977 INFO L87 Difference]: Start difference. First operand 1744 states and 5088 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:23:13,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:13,742 INFO L93 Difference]: Finished difference Result 2266 states and 6481 transitions. [2021-02-19 19:23:13,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:23:13,742 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:13,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:13,744 INFO L225 Difference]: With dead ends: 2266 [2021-02-19 19:23:13,744 INFO L226 Difference]: Without dead ends: 2251 [2021-02-19 19:23:13,745 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:23:13,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-02-19 19:23:13,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1765. [2021-02-19 19:23:13,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 2.9280045351473922) internal successors, (5165), 1764 states have internal predecessors, (5165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 5165 transitions. [2021-02-19 19:23:13,764 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 5165 transitions. Word has length 33 [2021-02-19 19:23:13,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:13,764 INFO L480 AbstractCegarLoop]: Abstraction has 1765 states and 5165 transitions. [2021-02-19 19:23:13,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-02-19 19:23:13,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 5165 transitions. [2021-02-19 19:23:13,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:13,766 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:13,766 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:13,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 19:23:13,981 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:13,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:13,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1735933874, now seen corresponding path program 24 times [2021-02-19 19:23:13,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:13,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494383802] [2021-02-19 19:23:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:14,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494383802] [2021-02-19 19:23:14,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105408209] [2021-02-19 19:23:14,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:14,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:23:14,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:14,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 19:23:14,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:14,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:14,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:23:14,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737754498] [2021-02-19 19:23:14,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:23:14,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:14,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:23:14,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:14,370 INFO L87 Difference]: Start difference. First operand 1765 states and 5165 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:14,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:14,948 INFO L93 Difference]: Finished difference Result 2604 states and 7487 transitions. [2021-02-19 19:23:14,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:23:14,948 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:23:14,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:14,951 INFO L225 Difference]: With dead ends: 2604 [2021-02-19 19:23:14,951 INFO L226 Difference]: Without dead ends: 2589 [2021-02-19 19:23:14,951 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:23:14,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-02-19 19:23:14,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 1702. [2021-02-19 19:23:14,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 2.9253380364491477) internal successors, (4976), 1701 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 4976 transitions. [2021-02-19 19:23:14,970 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 4976 transitions. Word has length 33 [2021-02-19 19:23:14,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:14,970 INFO L480 AbstractCegarLoop]: Abstraction has 1702 states and 4976 transitions. [2021-02-19 19:23:14,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:14,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 4976 transitions. [2021-02-19 19:23:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:14,972 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:14,972 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:15,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:15,173 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:15,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:15,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1642524798, now seen corresponding path program 25 times [2021-02-19 19:23:15,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:15,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894348661] [2021-02-19 19:23:15,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:15,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894348661] [2021-02-19 19:23:15,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488833337] [2021-02-19 19:23:15,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:15,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:15,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:15,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:15,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-02-19 19:23:15,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709341193] [2021-02-19 19:23:15,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:23:15,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:15,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:23:15,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:23:15,647 INFO L87 Difference]: Start difference. First operand 1702 states and 4976 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:16,793 INFO L93 Difference]: Finished difference Result 3133 states and 8917 transitions. [2021-02-19 19:23:16,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:23:16,794 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:16,797 INFO L225 Difference]: With dead ends: 3133 [2021-02-19 19:23:16,797 INFO L226 Difference]: Without dead ends: 3118 [2021-02-19 19:23:16,797 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=1883, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 19:23:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2021-02-19 19:23:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 1726. [2021-02-19 19:23:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 2.926376811594203) internal successors, (5048), 1725 states have internal predecessors, (5048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:16,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 5048 transitions. [2021-02-19 19:23:16,819 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 5048 transitions. Word has length 33 [2021-02-19 19:23:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:16,819 INFO L480 AbstractCegarLoop]: Abstraction has 1726 states and 5048 transitions. [2021-02-19 19:23:16,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 5048 transitions. [2021-02-19 19:23:16,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:16,821 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:16,821 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:17,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 19:23:17,034 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:17,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:17,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1535074430, now seen corresponding path program 26 times [2021-02-19 19:23:17,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:17,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584199724] [2021-02-19 19:23:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:17,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584199724] [2021-02-19 19:23:17,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526257672] [2021-02-19 19:23:17,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:17,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:17,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:17,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:23:17,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:17,389 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 5 treesize of output 3 [2021-02-19 19:23:17,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:17,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:17,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:23:17,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-02-19 19:23:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:17,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:17,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-02-19 19:23:17,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73323801] [2021-02-19 19:23:17,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:23:17,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:17,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:23:17,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:23:17,533 INFO L87 Difference]: Start difference. First operand 1726 states and 5048 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:19,270 INFO L93 Difference]: Finished difference Result 2426 states and 6916 transitions. [2021-02-19 19:23:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:23:19,271 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:19,273 INFO L225 Difference]: With dead ends: 2426 [2021-02-19 19:23:19,273 INFO L226 Difference]: Without dead ends: 2411 [2021-02-19 19:23:19,274 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=375, Invalid=2817, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 19:23:19,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-02-19 19:23:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1738. [2021-02-19 19:23:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.929188255613126) internal successors, (5088), 1737 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:19,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5088 transitions. [2021-02-19 19:23:19,294 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5088 transitions. Word has length 33 [2021-02-19 19:23:19,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:19,294 INFO L480 AbstractCegarLoop]: Abstraction has 1738 states and 5088 transitions. [2021-02-19 19:23:19,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:19,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5088 transitions. [2021-02-19 19:23:19,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:19,296 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:19,296 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:19,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 19:23:19,506 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:19,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:19,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1883710402, now seen corresponding path program 27 times [2021-02-19 19:23:19,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:19,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446527616] [2021-02-19 19:23:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:19,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446527616] [2021-02-19 19:23:19,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850816325] [2021-02-19 19:23:19,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:19,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:23:19,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:19,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:23:19,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:19,846 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 5 treesize of output 3 [2021-02-19 19:23:19,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:19,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:19,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:23:19,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-02-19 19:23:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:19,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:19,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-02-19 19:23:19,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470279582] [2021-02-19 19:23:19,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:23:19,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:19,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:23:19,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:23:19,988 INFO L87 Difference]: Start difference. First operand 1738 states and 5088 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:21,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:21,392 INFO L93 Difference]: Finished difference Result 2450 states and 7097 transitions. [2021-02-19 19:23:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:23:21,392 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:21,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:21,394 INFO L225 Difference]: With dead ends: 2450 [2021-02-19 19:23:21,394 INFO L226 Difference]: Without dead ends: 2431 [2021-02-19 19:23:21,395 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=315, Invalid=2337, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 19:23:21,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-02-19 19:23:21,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1734. [2021-02-19 19:23:21,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.9267166762839008) internal successors, (5072), 1733 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5072 transitions. [2021-02-19 19:23:21,416 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5072 transitions. Word has length 33 [2021-02-19 19:23:21,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:21,416 INFO L480 AbstractCegarLoop]: Abstraction has 1734 states and 5072 transitions. [2021-02-19 19:23:21,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:21,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5072 transitions. [2021-02-19 19:23:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:21,418 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:21,418 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:21,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:21,619 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:21,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:21,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2025425542, now seen corresponding path program 28 times [2021-02-19 19:23:21,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:21,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238665395] [2021-02-19 19:23:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:21,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238665395] [2021-02-19 19:23:21,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46588553] [2021-02-19 19:23:21,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:21,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:23:21,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:21,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:21,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:22,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:22,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-02-19 19:23:22,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144036416] [2021-02-19 19:23:22,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:23:22,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:22,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:23:22,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:23:22,081 INFO L87 Difference]: Start difference. First operand 1734 states and 5072 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:23,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:23,287 INFO L93 Difference]: Finished difference Result 3027 states and 8657 transitions. [2021-02-19 19:23:23,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:23:23,288 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:23,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:23,291 INFO L225 Difference]: With dead ends: 3027 [2021-02-19 19:23:23,291 INFO L226 Difference]: Without dead ends: 3012 [2021-02-19 19:23:23,292 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=327, Invalid=2325, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 19:23:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-02-19 19:23:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 1730. [2021-02-19 19:23:23,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.926547137073453) internal successors, (5060), 1729 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:23,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5060 transitions. [2021-02-19 19:23:23,313 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5060 transitions. Word has length 33 [2021-02-19 19:23:23,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:23,313 INFO L480 AbstractCegarLoop]: Abstraction has 1730 states and 5060 transitions. [2021-02-19 19:23:23,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:23,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5060 transitions. [2021-02-19 19:23:23,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:23,315 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:23,315 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:23,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:23,518 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:23,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:23,518 INFO L82 PathProgramCache]: Analyzing trace with hash 742278082, now seen corresponding path program 29 times [2021-02-19 19:23:23,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:23,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421499377] [2021-02-19 19:23:23,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:23,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421499377] [2021-02-19 19:23:23,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818827294] [2021-02-19 19:23:23,720 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 [2021-02-19 19:23:23,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:23,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:23,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:23,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:23,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:23,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-02-19 19:23:23,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205069227] [2021-02-19 19:23:23,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:23:23,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:23,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:23:23,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:23:23,980 INFO L87 Difference]: Start difference. First operand 1730 states and 5060 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:25,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:25,280 INFO L93 Difference]: Finished difference Result 3089 states and 8805 transitions. [2021-02-19 19:23:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:23:25,280 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:25,284 INFO L225 Difference]: With dead ends: 3089 [2021-02-19 19:23:25,284 INFO L226 Difference]: Without dead ends: 3074 [2021-02-19 19:23:25,284 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=301, Invalid=2149, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 19:23:25,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-02-19 19:23:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 1710. [2021-02-19 19:23:25,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 2.925687536571094) internal successors, (5000), 1709 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:25,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5000 transitions. [2021-02-19 19:23:25,305 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5000 transitions. Word has length 33 [2021-02-19 19:23:25,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:25,305 INFO L480 AbstractCegarLoop]: Abstraction has 1710 states and 5000 transitions. [2021-02-19 19:23:25,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:25,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5000 transitions. [2021-02-19 19:23:25,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:25,307 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:25,307 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:25,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-02-19 19:23:25,508 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:25,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:25,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1151266472, now seen corresponding path program 30 times [2021-02-19 19:23:25,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:25,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756120082] [2021-02-19 19:23:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:25,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756120082] [2021-02-19 19:23:25,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561874621] [2021-02-19 19:23:25,703 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) [2021-02-19 19:23:25,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 19:23:25,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:25,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:23:25,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:25,884 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 5 treesize of output 3 [2021-02-19 19:23:25,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:25,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:25,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:23:25,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-02-19 19:23:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:25,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:25,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-02-19 19:23:25,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649872464] [2021-02-19 19:23:25,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:23:25,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:25,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:23:25,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:23:25,990 INFO L87 Difference]: Start difference. First operand 1710 states and 5000 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:27,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:27,174 INFO L93 Difference]: Finished difference Result 3178 states and 9047 transitions. [2021-02-19 19:23:27,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:23:27,175 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:27,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:27,178 INFO L225 Difference]: With dead ends: 3178 [2021-02-19 19:23:27,178 INFO L226 Difference]: Without dead ends: 3163 [2021-02-19 19:23:27,179 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=286, Invalid=2164, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 19:23:27,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-02-19 19:23:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 1731. [2021-02-19 19:23:27,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 2.921387283236994) internal successors, (5054), 1730 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:27,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 5054 transitions. [2021-02-19 19:23:27,208 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 5054 transitions. Word has length 33 [2021-02-19 19:23:27,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:27,208 INFO L480 AbstractCegarLoop]: Abstraction has 1731 states and 5054 transitions. [2021-02-19 19:23:27,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:27,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 5054 transitions. [2021-02-19 19:23:27,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:27,210 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:27,210 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:27,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:27,424 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:27,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:27,425 INFO L82 PathProgramCache]: Analyzing trace with hash -971802008, now seen corresponding path program 31 times [2021-02-19 19:23:27,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:27,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620451848] [2021-02-19 19:23:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:27,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620451848] [2021-02-19 19:23:27,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313632457] [2021-02-19 19:23:27,629 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 [2021-02-19 19:23:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:27,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:27,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:27,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:27,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-02-19 19:23:27,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618304300] [2021-02-19 19:23:27,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:23:27,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:27,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:23:27,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:23:27,900 INFO L87 Difference]: Start difference. First operand 1731 states and 5054 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:29,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:29,384 INFO L93 Difference]: Finished difference Result 4067 states and 11353 transitions. [2021-02-19 19:23:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 19:23:29,385 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:29,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:29,389 INFO L225 Difference]: With dead ends: 4067 [2021-02-19 19:23:29,389 INFO L226 Difference]: Without dead ends: 4037 [2021-02-19 19:23:29,390 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=366, Invalid=2604, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 19:23:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-02-19 19:23:29,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 1768. [2021-02-19 19:23:29,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 2.9134125636672326) internal successors, (5148), 1767 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5148 transitions. [2021-02-19 19:23:29,413 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5148 transitions. Word has length 33 [2021-02-19 19:23:29,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:29,413 INFO L480 AbstractCegarLoop]: Abstraction has 1768 states and 5148 transitions. [2021-02-19 19:23:29,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:29,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5148 transitions. [2021-02-19 19:23:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:29,415 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:29,415 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:29,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-02-19 19:23:29,616 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:29,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1962923144, now seen corresponding path program 32 times [2021-02-19 19:23:29,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:29,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733726627] [2021-02-19 19:23:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:29,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733726627] [2021-02-19 19:23:29,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655882711] [2021-02-19 19:23:29,839 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 [2021-02-19 19:23:29,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:29,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:29,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:23:29,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:30,008 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 5 treesize of output 3 [2021-02-19 19:23:30,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:30,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:30,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:23:30,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-02-19 19:23:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:30,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:30,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-02-19 19:23:30,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226648366] [2021-02-19 19:23:30,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:23:30,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:30,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:23:30,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:23:30,113 INFO L87 Difference]: Start difference. First operand 1768 states and 5148 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:31,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:31,515 INFO L93 Difference]: Finished difference Result 3380 states and 9565 transitions. [2021-02-19 19:23:31,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:23:31,515 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:31,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:31,519 INFO L225 Difference]: With dead ends: 3380 [2021-02-19 19:23:31,519 INFO L226 Difference]: Without dead ends: 3365 [2021-02-19 19:23:31,520 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=306, Invalid=2450, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 19:23:31,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2021-02-19 19:23:31,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 1852. [2021-02-19 19:23:31,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.902215018908698) internal successors, (5372), 1851 states have internal predecessors, (5372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:31,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 5372 transitions. [2021-02-19 19:23:31,544 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 5372 transitions. Word has length 33 [2021-02-19 19:23:31,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:31,544 INFO L480 AbstractCegarLoop]: Abstraction has 1852 states and 5372 transitions. [2021-02-19 19:23:31,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:31,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 5372 transitions. [2021-02-19 19:23:31,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:31,546 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:31,546 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:31,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 19:23:31,747 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:31,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:31,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2120448080, now seen corresponding path program 33 times [2021-02-19 19:23:31,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:31,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770452769] [2021-02-19 19:23:31,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:31,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770452769] [2021-02-19 19:23:31,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753454720] [2021-02-19 19:23:31,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:23:32,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:23:32,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:32,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:23:32,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:32,166 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 5 treesize of output 3 [2021-02-19 19:23:32,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:32,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:32,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:23:32,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-02-19 19:23:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:32,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:32,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-02-19 19:23:32,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398888550] [2021-02-19 19:23:32,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:23:32,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:32,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:23:32,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:23:32,322 INFO L87 Difference]: Start difference. First operand 1852 states and 5372 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:34,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:34,487 INFO L93 Difference]: Finished difference Result 3776 states and 10567 transitions. [2021-02-19 19:23:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 19:23:34,487 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:34,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:34,491 INFO L225 Difference]: With dead ends: 3776 [2021-02-19 19:23:34,491 INFO L226 Difference]: Without dead ends: 3746 [2021-02-19 19:23:34,492 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=373, Invalid=3287, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 19:23:34,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3746 states. [2021-02-19 19:23:34,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3746 to 1915. [2021-02-19 19:23:34,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.9054336468129573) internal successors, (5561), 1914 states have internal predecessors, (5561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5561 transitions. [2021-02-19 19:23:34,515 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5561 transitions. Word has length 33 [2021-02-19 19:23:34,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:34,515 INFO L480 AbstractCegarLoop]: Abstraction has 1915 states and 5561 transitions. [2021-02-19 19:23:34,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:34,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5561 transitions. [2021-02-19 19:23:34,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:34,517 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:34,517 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:34,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 19:23:34,719 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:34,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:34,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1891689236, now seen corresponding path program 34 times [2021-02-19 19:23:34,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:34,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391817385] [2021-02-19 19:23:34,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:34,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391817385] [2021-02-19 19:23:34,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183021133] [2021-02-19 19:23:34,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:34,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:23:34,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:34,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:34,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:35,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:35,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-02-19 19:23:35,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338646290] [2021-02-19 19:23:35,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:23:35,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:35,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:23:35,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:23:35,206 INFO L87 Difference]: Start difference. First operand 1915 states and 5561 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:36,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:36,433 INFO L93 Difference]: Finished difference Result 3286 states and 9167 transitions. [2021-02-19 19:23:36,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 19:23:36,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:36,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:36,437 INFO L225 Difference]: With dead ends: 3286 [2021-02-19 19:23:36,437 INFO L226 Difference]: Without dead ends: 3256 [2021-02-19 19:23:36,437 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:23:36,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2021-02-19 19:23:36,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 1894. [2021-02-19 19:23:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 2.8969889064976226) internal successors, (5484), 1893 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:36,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 5484 transitions. [2021-02-19 19:23:36,459 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 5484 transitions. Word has length 33 [2021-02-19 19:23:36,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:36,459 INFO L480 AbstractCegarLoop]: Abstraction has 1894 states and 5484 transitions. [2021-02-19 19:23:36,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:36,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 5484 transitions. [2021-02-19 19:23:36,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:36,461 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:36,461 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:36,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 19:23:36,666 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:36,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:36,666 INFO L82 PathProgramCache]: Analyzing trace with hash 944957436, now seen corresponding path program 35 times [2021-02-19 19:23:36,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:36,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542439043] [2021-02-19 19:23:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:36,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542439043] [2021-02-19 19:23:36,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208514545] [2021-02-19 19:23:36,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:23:36,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:36,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:36,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:36,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:37,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:37,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-02-19 19:23:37,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971092356] [2021-02-19 19:23:37,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:23:37,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:37,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:23:37,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:23:37,138 INFO L87 Difference]: Start difference. First operand 1894 states and 5484 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:38,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:38,800 INFO L93 Difference]: Finished difference Result 3610 states and 10178 transitions. [2021-02-19 19:23:38,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 19:23:38,800 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:38,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:38,804 INFO L225 Difference]: With dead ends: 3610 [2021-02-19 19:23:38,804 INFO L226 Difference]: Without dead ends: 3580 [2021-02-19 19:23:38,804 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=389, Invalid=2917, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 19:23:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2021-02-19 19:23:38,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 1873. [2021-02-19 19:23:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 2.8995726495726495) internal successors, (5428), 1872 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:38,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 5428 transitions. [2021-02-19 19:23:38,826 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 5428 transitions. Word has length 33 [2021-02-19 19:23:38,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:38,826 INFO L480 AbstractCegarLoop]: Abstraction has 1873 states and 5428 transitions. [2021-02-19 19:23:38,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:38,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 5428 transitions. [2021-02-19 19:23:38,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:38,828 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:38,828 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:39,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 19:23:39,028 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:39,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:39,029 INFO L82 PathProgramCache]: Analyzing trace with hash 790519918, now seen corresponding path program 36 times [2021-02-19 19:23:39,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:39,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223067800] [2021-02-19 19:23:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:39,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223067800] [2021-02-19 19:23:39,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908076586] [2021-02-19 19:23:39,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:39,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 19:23:39,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:39,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:23:39,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:39,418 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 5 treesize of output 3 [2021-02-19 19:23:39,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:39,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:39,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:23:39,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-02-19 19:23:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:39,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:39,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-02-19 19:23:39,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690214030] [2021-02-19 19:23:39,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:23:39,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:39,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:23:39,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:23:39,558 INFO L87 Difference]: Start difference. First operand 1873 states and 5428 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:41,379 INFO L93 Difference]: Finished difference Result 3372 states and 9542 transitions. [2021-02-19 19:23:41,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 19:23:41,379 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:23:41,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:41,383 INFO L225 Difference]: With dead ends: 3372 [2021-02-19 19:23:41,383 INFO L226 Difference]: Without dead ends: 3342 [2021-02-19 19:23:41,383 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=333, Invalid=2859, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 19:23:41,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2021-02-19 19:23:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 1768. [2021-02-19 19:23:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 2.9134125636672326) internal successors, (5148), 1767 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5148 transitions. [2021-02-19 19:23:41,414 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5148 transitions. Word has length 33 [2021-02-19 19:23:41,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:41,414 INFO L480 AbstractCegarLoop]: Abstraction has 1768 states and 5148 transitions. [2021-02-19 19:23:41,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:41,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5148 transitions. [2021-02-19 19:23:41,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:41,416 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:41,416 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:41,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 19:23:41,630 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1797635062, now seen corresponding path program 37 times [2021-02-19 19:23:41,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:41,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749083696] [2021-02-19 19:23:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:41,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749083696] [2021-02-19 19:23:41,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152153001] [2021-02-19 19:23:41,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:41,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:41,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:41,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:41,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:23:41,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850738183] [2021-02-19 19:23:41,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:23:41,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:41,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:23:41,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:23:41,972 INFO L87 Difference]: Start difference. First operand 1768 states and 5148 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:23:42,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:42,424 INFO L93 Difference]: Finished difference Result 2915 states and 8366 transitions. [2021-02-19 19:23:42,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:23:42,425 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 [2021-02-19 19:23:42,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:42,428 INFO L225 Difference]: With dead ends: 2915 [2021-02-19 19:23:42,428 INFO L226 Difference]: Without dead ends: 2900 [2021-02-19 19:23:42,428 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:23:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2021-02-19 19:23:42,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 1844. [2021-02-19 19:23:42,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 2.921323928377645) internal successors, (5384), 1843 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:42,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 5384 transitions. [2021-02-19 19:23:42,450 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 5384 transitions. Word has length 33 [2021-02-19 19:23:42,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:42,450 INFO L480 AbstractCegarLoop]: Abstraction has 1844 states and 5384 transitions. [2021-02-19 19:23:42,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:23:42,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 5384 transitions. [2021-02-19 19:23:42,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:42,451 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:42,451 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:42,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 19:23:42,666 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:42,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:42,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1690184694, now seen corresponding path program 38 times [2021-02-19 19:23:42,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:42,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210453011] [2021-02-19 19:23:42,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:42,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210453011] [2021-02-19 19:23:42,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952962260] [2021-02-19 19:23:42,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:42,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:42,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:42,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:23:42,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:42,951 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 5 treesize of output 3 [2021-02-19 19:23:42,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:42,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:42,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:23:42,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-02-19 19:23:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:43,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:43,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:23:43,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947720136] [2021-02-19 19:23:43,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:23:43,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:43,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:23:43,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:43,087 INFO L87 Difference]: Start difference. First operand 1844 states and 5384 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:43,837 INFO L93 Difference]: Finished difference Result 2512 states and 7162 transitions. [2021-02-19 19:23:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:23:43,838 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:23:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:43,840 INFO L225 Difference]: With dead ends: 2512 [2021-02-19 19:23:43,840 INFO L226 Difference]: Without dead ends: 2497 [2021-02-19 19:23:43,841 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:23:43,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-02-19 19:23:43,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1856. [2021-02-19 19:23:43,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 2.923989218328841) internal successors, (5424), 1855 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5424 transitions. [2021-02-19 19:23:43,871 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5424 transitions. Word has length 33 [2021-02-19 19:23:43,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:43,871 INFO L480 AbstractCegarLoop]: Abstraction has 1856 states and 5424 transitions. [2021-02-19 19:23:43,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:43,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5424 transitions. [2021-02-19 19:23:43,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:43,872 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:43,873 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:44,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:44,073 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:44,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:44,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1728600138, now seen corresponding path program 39 times [2021-02-19 19:23:44,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:44,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269745520] [2021-02-19 19:23:44,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:44,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269745520] [2021-02-19 19:23:44,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122993974] [2021-02-19 19:23:44,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:44,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:23:44,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:44,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:23:44,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:44,334 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 5 treesize of output 3 [2021-02-19 19:23:44,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:44,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:44,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:23:44,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-02-19 19:23:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:44,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:44,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:23:44,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958109473] [2021-02-19 19:23:44,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:23:44,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:44,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:23:44,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:44,461 INFO L87 Difference]: Start difference. First operand 1856 states and 5424 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:44,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:44,985 INFO L93 Difference]: Finished difference Result 2789 states and 8006 transitions. [2021-02-19 19:23:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:23:44,990 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:23:44,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:44,993 INFO L225 Difference]: With dead ends: 2789 [2021-02-19 19:23:44,993 INFO L226 Difference]: Without dead ends: 2770 [2021-02-19 19:23:44,993 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:23:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2021-02-19 19:23:45,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 1852. [2021-02-19 19:23:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.921663965424095) internal successors, (5408), 1851 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:45,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 5408 transitions. [2021-02-19 19:23:45,017 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 5408 transitions. Word has length 33 [2021-02-19 19:23:45,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:45,017 INFO L480 AbstractCegarLoop]: Abstraction has 1852 states and 5408 transitions. [2021-02-19 19:23:45,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:45,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 5408 transitions. [2021-02-19 19:23:45,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:45,019 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:45,019 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:45,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:45,233 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:45,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:45,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1870315278, now seen corresponding path program 40 times [2021-02-19 19:23:45,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:45,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826338591] [2021-02-19 19:23:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:45,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826338591] [2021-02-19 19:23:45,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243074427] [2021-02-19 19:23:45,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:45,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:23:45,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:45,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:45,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:45,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:45,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:23:45,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259887441] [2021-02-19 19:23:45,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:23:45,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:45,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:23:45,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:23:45,582 INFO L87 Difference]: Start difference. First operand 1852 states and 5408 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:23:46,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:46,254 INFO L93 Difference]: Finished difference Result 3085 states and 8828 transitions. [2021-02-19 19:23:46,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:23:46,254 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 [2021-02-19 19:23:46,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:46,258 INFO L225 Difference]: With dead ends: 3085 [2021-02-19 19:23:46,258 INFO L226 Difference]: Without dead ends: 3070 [2021-02-19 19:23:46,258 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:23:46,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-02-19 19:23:46,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 1867. [2021-02-19 19:23:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 2.9217577706323685) internal successors, (5452), 1866 states have internal predecessors, (5452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:46,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 5452 transitions. [2021-02-19 19:23:46,280 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 5452 transitions. Word has length 33 [2021-02-19 19:23:46,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:46,281 INFO L480 AbstractCegarLoop]: Abstraction has 1867 states and 5452 transitions. [2021-02-19 19:23:46,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:23:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 5452 transitions. [2021-02-19 19:23:46,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:46,282 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:46,282 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:46,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:46,483 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:46,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:46,483 INFO L82 PathProgramCache]: Analyzing trace with hash 587167818, now seen corresponding path program 41 times [2021-02-19 19:23:46,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:46,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333578476] [2021-02-19 19:23:46,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:46,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333578476] [2021-02-19 19:23:46,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561764177] [2021-02-19 19:23:46,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:23:46,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:46,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:46,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:46,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:46,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:46,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:23:46,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927683449] [2021-02-19 19:23:46,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:23:46,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:46,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:23:46,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:23:46,859 INFO L87 Difference]: Start difference. First operand 1867 states and 5452 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:23:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:47,395 INFO L93 Difference]: Finished difference Result 3084 states and 8813 transitions. [2021-02-19 19:23:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:23:47,396 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 [2021-02-19 19:23:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:47,399 INFO L225 Difference]: With dead ends: 3084 [2021-02-19 19:23:47,399 INFO L226 Difference]: Without dead ends: 3069 [2021-02-19 19:23:47,399 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:23:47,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-02-19 19:23:47,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1847. [2021-02-19 19:23:47,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 2.9209100758396533) internal successors, (5392), 1846 states have internal predecessors, (5392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 5392 transitions. [2021-02-19 19:23:47,419 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 5392 transitions. Word has length 33 [2021-02-19 19:23:47,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:47,420 INFO L480 AbstractCegarLoop]: Abstraction has 1847 states and 5392 transitions. [2021-02-19 19:23:47,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:23:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 5392 transitions. [2021-02-19 19:23:47,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:47,421 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:47,421 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:47,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-02-19 19:23:47,622 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:47,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:47,622 INFO L82 PathProgramCache]: Analyzing trace with hash 809047050, now seen corresponding path program 42 times [2021-02-19 19:23:47,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:47,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739002865] [2021-02-19 19:23:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:47,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739002865] [2021-02-19 19:23:47,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118122570] [2021-02-19 19:23:47,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:47,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 19:23:47,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:47,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 19:23:47,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:47,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:47,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:23:47,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037968473] [2021-02-19 19:23:47,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:23:47,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:47,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:23:47,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:47,985 INFO L87 Difference]: Start difference. First operand 1847 states and 5392 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:48,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:48,441 INFO L93 Difference]: Finished difference Result 2961 states and 8504 transitions. [2021-02-19 19:23:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:23:48,441 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:23:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:48,444 INFO L225 Difference]: With dead ends: 2961 [2021-02-19 19:23:48,444 INFO L226 Difference]: Without dead ends: 2946 [2021-02-19 19:23:48,445 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:23:48,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2021-02-19 19:23:48,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 1931. [2021-02-19 19:23:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.9098445595854923) internal successors, (5616), 1930 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5616 transitions. [2021-02-19 19:23:48,465 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5616 transitions. Word has length 33 [2021-02-19 19:23:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:48,465 INFO L480 AbstractCegarLoop]: Abstraction has 1931 states and 5616 transitions. [2021-02-19 19:23:48,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5616 transitions. [2021-02-19 19:23:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:48,466 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:48,467 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:48,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:48,667 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:48,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:48,667 INFO L82 PathProgramCache]: Analyzing trace with hash 835115926, now seen corresponding path program 43 times [2021-02-19 19:23:48,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:48,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864740056] [2021-02-19 19:23:48,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:48,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864740056] [2021-02-19 19:23:48,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312943583] [2021-02-19 19:23:48,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:48,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:48,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:49,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:49,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:23:49,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389731334] [2021-02-19 19:23:49,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:23:49,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:49,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:23:49,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:23:49,019 INFO L87 Difference]: Start difference. First operand 1931 states and 5616 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:23:49,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:49,765 INFO L93 Difference]: Finished difference Result 2621 states and 7460 transitions. [2021-02-19 19:23:49,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:23:49,766 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 [2021-02-19 19:23:49,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:49,769 INFO L225 Difference]: With dead ends: 2621 [2021-02-19 19:23:49,769 INFO L226 Difference]: Without dead ends: 2606 [2021-02-19 19:23:49,769 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:23:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-02-19 19:23:49,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1994. [2021-02-19 19:23:49,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.912694430506774) internal successors, (5805), 1993 states have internal predecessors, (5805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5805 transitions. [2021-02-19 19:23:49,789 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5805 transitions. Word has length 33 [2021-02-19 19:23:49,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:49,789 INFO L480 AbstractCegarLoop]: Abstraction has 1994 states and 5805 transitions. [2021-02-19 19:23:49,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:23:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5805 transitions. [2021-02-19 19:23:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:49,790 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:49,791 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:49,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:49,991 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:49,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:49,991 INFO L82 PathProgramCache]: Analyzing trace with hash 606357082, now seen corresponding path program 44 times [2021-02-19 19:23:49,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:49,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457031079] [2021-02-19 19:23:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:50,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457031079] [2021-02-19 19:23:50,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031845845] [2021-02-19 19:23:50,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:50,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:50,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:50,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:23:50,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:50,263 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 5 treesize of output 3 [2021-02-19 19:23:50,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:50,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:50,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:23:50,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:23:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:50,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:50,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:23:50,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474732339] [2021-02-19 19:23:50,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:23:50,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:50,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:23:50,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:50,393 INFO L87 Difference]: Start difference. First operand 1994 states and 5805 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:50,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:50,872 INFO L93 Difference]: Finished difference Result 2898 states and 8304 transitions. [2021-02-19 19:23:50,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:23:50,872 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:23:50,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:50,875 INFO L225 Difference]: With dead ends: 2898 [2021-02-19 19:23:50,875 INFO L226 Difference]: Without dead ends: 2883 [2021-02-19 19:23:50,876 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:23:50,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2021-02-19 19:23:50,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 1973. [2021-02-19 19:23:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 2.9046653144016226) internal successors, (5728), 1972 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:50,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 5728 transitions. [2021-02-19 19:23:50,904 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 5728 transitions. Word has length 33 [2021-02-19 19:23:50,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:50,904 INFO L480 AbstractCegarLoop]: Abstraction has 1973 states and 5728 transitions. [2021-02-19 19:23:50,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:50,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 5728 transitions. [2021-02-19 19:23:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:50,906 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:50,906 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:51,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-02-19 19:23:51,110 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:51,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:51,110 INFO L82 PathProgramCache]: Analyzing trace with hash -340374718, now seen corresponding path program 45 times [2021-02-19 19:23:51,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:51,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235516861] [2021-02-19 19:23:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:51,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235516861] [2021-02-19 19:23:51,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195253402] [2021-02-19 19:23:51,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:51,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:23:51,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:51,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:23:51,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:51,391 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 5 treesize of output 3 [2021-02-19 19:23:51,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:51,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:51,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:23:51,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:23:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:51,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:51,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:23:51,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585370252] [2021-02-19 19:23:51,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:23:51,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:51,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:23:51,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:51,509 INFO L87 Difference]: Start difference. First operand 1973 states and 5728 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:52,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:52,040 INFO L93 Difference]: Finished difference Result 3145 states and 8991 transitions. [2021-02-19 19:23:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:23:52,040 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:23:52,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:52,044 INFO L225 Difference]: With dead ends: 3145 [2021-02-19 19:23:52,044 INFO L226 Difference]: Without dead ends: 3130 [2021-02-19 19:23:52,044 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:23:52,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3130 states. [2021-02-19 19:23:52,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3130 to 1994. [2021-02-19 19:23:52,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.902157551430005) internal successors, (5784), 1993 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:52,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5784 transitions. [2021-02-19 19:23:52,065 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5784 transitions. Word has length 33 [2021-02-19 19:23:52,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:52,065 INFO L480 AbstractCegarLoop]: Abstraction has 1994 states and 5784 transitions. [2021-02-19 19:23:52,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5784 transitions. [2021-02-19 19:23:52,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:52,067 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:52,067 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:52,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-02-19 19:23:52,267 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:52,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:52,268 INFO L82 PathProgramCache]: Analyzing trace with hash -494812236, now seen corresponding path program 46 times [2021-02-19 19:23:52,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:52,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364893031] [2021-02-19 19:23:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:52,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364893031] [2021-02-19 19:23:52,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922516369] [2021-02-19 19:23:52,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:52,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:23:52,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:52,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:52,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:52,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:52,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:23:52,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981321619] [2021-02-19 19:23:52,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:23:52,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:52,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:23:52,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:23:52,615 INFO L87 Difference]: Start difference. First operand 1994 states and 5784 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:23:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:53,195 INFO L93 Difference]: Finished difference Result 3024 states and 8672 transitions. [2021-02-19 19:23:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:23:53,195 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 [2021-02-19 19:23:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:53,198 INFO L225 Difference]: With dead ends: 3024 [2021-02-19 19:23:53,198 INFO L226 Difference]: Without dead ends: 3009 [2021-02-19 19:23:53,199 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:23:53,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-02-19 19:23:53,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 1889. [2021-02-19 19:23:53,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 2.9152542372881354) internal successors, (5504), 1888 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 5504 transitions. [2021-02-19 19:23:53,219 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 5504 transitions. Word has length 33 [2021-02-19 19:23:53,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:53,219 INFO L480 AbstractCegarLoop]: Abstraction has 1889 states and 5504 transitions. [2021-02-19 19:23:53,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:23:53,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 5504 transitions. [2021-02-19 19:23:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:53,220 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:53,220 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:53,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-02-19 19:23:53,421 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:53,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:53,421 INFO L82 PathProgramCache]: Analyzing trace with hash -2018199606, now seen corresponding path program 47 times [2021-02-19 19:23:53,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:53,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983416700] [2021-02-19 19:23:53,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:53,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983416700] [2021-02-19 19:23:53,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631984201] [2021-02-19 19:23:53,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:53,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:53,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:53,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:53,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:53,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:53,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:23:53,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324140268] [2021-02-19 19:23:53,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:23:53,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:53,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:23:53,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:23:53,802 INFO L87 Difference]: Start difference. First operand 1889 states and 5504 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:23:54,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:54,572 INFO L93 Difference]: Finished difference Result 2385 states and 6869 transitions. [2021-02-19 19:23:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:23:54,573 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 [2021-02-19 19:23:54,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:54,575 INFO L225 Difference]: With dead ends: 2385 [2021-02-19 19:23:54,575 INFO L226 Difference]: Without dead ends: 2370 [2021-02-19 19:23:54,575 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:23:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-02-19 19:23:54,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 1915. [2021-02-19 19:23:54,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.9231974921630095) internal successors, (5595), 1914 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5595 transitions. [2021-02-19 19:23:54,594 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5595 transitions. Word has length 33 [2021-02-19 19:23:54,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:54,594 INFO L480 AbstractCegarLoop]: Abstraction has 1915 states and 5595 transitions. [2021-02-19 19:23:54,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:23:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5595 transitions. [2021-02-19 19:23:54,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:54,596 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:54,596 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:54,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:54,806 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:54,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:54,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1400585226, now seen corresponding path program 48 times [2021-02-19 19:23:54,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:54,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990704370] [2021-02-19 19:23:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:54,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990704370] [2021-02-19 19:23:54,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239755828] [2021-02-19 19:23:54,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:54,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 19:23:54,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:54,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:23:54,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:55,067 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 5 treesize of output 3 [2021-02-19 19:23:55,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:55,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:55,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:23:55,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:23:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:55,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:55,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:23:55,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193215437] [2021-02-19 19:23:55,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:23:55,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:55,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:23:55,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:55,224 INFO L87 Difference]: Start difference. First operand 1915 states and 5595 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:55,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:55,983 INFO L93 Difference]: Finished difference Result 2413 states and 6928 transitions. [2021-02-19 19:23:55,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:23:55,984 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:23:55,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:55,987 INFO L225 Difference]: With dead ends: 2413 [2021-02-19 19:23:55,987 INFO L226 Difference]: Without dead ends: 2394 [2021-02-19 19:23:55,987 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:23:55,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2021-02-19 19:23:56,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 1911. [2021-02-19 19:23:56,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 2.9209424083769635) internal successors, (5579), 1910 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5579 transitions. [2021-02-19 19:23:56,006 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5579 transitions. Word has length 33 [2021-02-19 19:23:56,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:56,006 INFO L480 AbstractCegarLoop]: Abstraction has 1911 states and 5579 transitions. [2021-02-19 19:23:56,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:56,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5579 transitions. [2021-02-19 19:23:56,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:56,007 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:56,008 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:56,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:56,208 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:56,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:56,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1650334710, now seen corresponding path program 49 times [2021-02-19 19:23:56,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:56,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825727832] [2021-02-19 19:23:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:56,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825727832] [2021-02-19 19:23:56,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295311286] [2021-02-19 19:23:56,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:56,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:23:56,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:56,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:56,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:23:56,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589465760] [2021-02-19 19:23:56,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:23:56,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:56,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:23:56,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:23:56,616 INFO L87 Difference]: Start difference. First operand 1911 states and 5579 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:23:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:57,455 INFO L93 Difference]: Finished difference Result 2450 states and 7029 transitions. [2021-02-19 19:23:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:23:57,456 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 [2021-02-19 19:23:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:57,458 INFO L225 Difference]: With dead ends: 2450 [2021-02-19 19:23:57,458 INFO L226 Difference]: Without dead ends: 2435 [2021-02-19 19:23:57,458 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:23:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-02-19 19:23:57,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1932. [2021-02-19 19:23:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.9290523045054377) internal successors, (5656), 1931 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 5656 transitions. [2021-02-19 19:23:57,476 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 5656 transitions. Word has length 33 [2021-02-19 19:23:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:57,477 INFO L480 AbstractCegarLoop]: Abstraction has 1932 states and 5656 transitions. [2021-02-19 19:23:57,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:23:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 5656 transitions. [2021-02-19 19:23:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:57,478 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:57,478 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:57,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:57,679 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:57,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:57,679 INFO L82 PathProgramCache]: Analyzing trace with hash 113335220, now seen corresponding path program 50 times [2021-02-19 19:23:57,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:57,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546092133] [2021-02-19 19:23:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:57,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546092133] [2021-02-19 19:23:57,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949828573] [2021-02-19 19:23:57,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:23:57,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:57,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:57,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:23:57,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:57,915 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 5 treesize of output 3 [2021-02-19 19:23:57,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:57,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:57,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:23:57,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:23:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:58,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:58,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:23:58,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972605526] [2021-02-19 19:23:58,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:23:58,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:58,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:23:58,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:58,069 INFO L87 Difference]: Start difference. First operand 1932 states and 5656 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:58,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:58,794 INFO L93 Difference]: Finished difference Result 2504 states and 7139 transitions. [2021-02-19 19:23:58,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:23:58,794 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:23:58,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:58,797 INFO L225 Difference]: With dead ends: 2504 [2021-02-19 19:23:58,797 INFO L226 Difference]: Without dead ends: 2489 [2021-02-19 19:23:58,797 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:23:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-02-19 19:23:58,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 1911. [2021-02-19 19:23:58,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 2.9209424083769635) internal successors, (5579), 1910 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:58,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5579 transitions. [2021-02-19 19:23:58,815 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5579 transitions. Word has length 33 [2021-02-19 19:23:58,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:58,815 INFO L480 AbstractCegarLoop]: Abstraction has 1911 states and 5579 transitions. [2021-02-19 19:23:58,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:58,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5579 transitions. [2021-02-19 19:23:58,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:58,817 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:58,817 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:59,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:59,017 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:59,018 INFO L82 PathProgramCache]: Analyzing trace with hash 173631562, now seen corresponding path program 51 times [2021-02-19 19:23:59,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:59,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688154640] [2021-02-19 19:23:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:59,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688154640] [2021-02-19 19:23:59,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352348764] [2021-02-19 19:23:59,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:59,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:23:59,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:59,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 19:23:59,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:59,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:59,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:23:59,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252836745] [2021-02-19 19:23:59,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:23:59,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:59,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:23:59,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:59,386 INFO L87 Difference]: Start difference. First operand 1911 states and 5579 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:59,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:59,797 INFO L93 Difference]: Finished difference Result 2538 states and 7369 transitions. [2021-02-19 19:23:59,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:23:59,797 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:23:59,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:59,800 INFO L225 Difference]: With dead ends: 2538 [2021-02-19 19:23:59,800 INFO L226 Difference]: Without dead ends: 2519 [2021-02-19 19:23:59,800 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:23:59,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-02-19 19:23:59,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1933. [2021-02-19 19:23:59,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.9151138716356106) internal successors, (5632), 1932 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 5632 transitions. [2021-02-19 19:23:59,819 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 5632 transitions. Word has length 33 [2021-02-19 19:23:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:59,844 INFO L480 AbstractCegarLoop]: Abstraction has 1933 states and 5632 transitions. [2021-02-19 19:23:59,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:23:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 5632 transitions. [2021-02-19 19:23:59,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:23:59,846 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:59,846 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:00,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-02-19 19:24:00,047 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:00,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:00,047 INFO L82 PathProgramCache]: Analyzing trace with hash -433806198, now seen corresponding path program 52 times [2021-02-19 19:24:00,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:00,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716297577] [2021-02-19 19:24:00,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:00,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716297577] [2021-02-19 19:24:00,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794017942] [2021-02-19 19:24:00,178 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 [2021-02-19 19:24:00,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:00,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:00,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:24:00,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:00,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:00,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:24:00,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580932606] [2021-02-19 19:24:00,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:24:00,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:00,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:24:00,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:24:00,386 INFO L87 Difference]: Start difference. First operand 1933 states and 5632 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:24:00,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:00,812 INFO L93 Difference]: Finished difference Result 2564 states and 7420 transitions. [2021-02-19 19:24:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:24:00,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 [2021-02-19 19:24:00,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:00,814 INFO L225 Difference]: With dead ends: 2564 [2021-02-19 19:24:00,815 INFO L226 Difference]: Without dead ends: 2549 [2021-02-19 19:24:00,815 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:24:00,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-02-19 19:24:00,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 1900. [2021-02-19 19:24:00,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9152185360716167) internal successors, (5536), 1899 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5536 transitions. [2021-02-19 19:24:00,834 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5536 transitions. Word has length 33 [2021-02-19 19:24:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:00,834 INFO L480 AbstractCegarLoop]: Abstraction has 1900 states and 5536 transitions. [2021-02-19 19:24:00,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:24:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5536 transitions. [2021-02-19 19:24:00,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:00,835 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:00,835 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:01,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:01,036 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:01,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:01,036 INFO L82 PathProgramCache]: Analyzing trace with hash 103356574, now seen corresponding path program 53 times [2021-02-19 19:24:01,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:01,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556766148] [2021-02-19 19:24:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:01,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556766148] [2021-02-19 19:24:01,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260631503] [2021-02-19 19:24:01,174 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 [2021-02-19 19:24:01,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:01,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:01,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:24:01,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:01,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:01,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:24:01,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254917954] [2021-02-19 19:24:01,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:24:01,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:01,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:24:01,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:24:01,421 INFO L87 Difference]: Start difference. First operand 1900 states and 5536 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:24:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:02,383 INFO L93 Difference]: Finished difference Result 2546 states and 7305 transitions. [2021-02-19 19:24:02,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:24:02,383 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 [2021-02-19 19:24:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:02,386 INFO L225 Difference]: With dead ends: 2546 [2021-02-19 19:24:02,386 INFO L226 Difference]: Without dead ends: 2531 [2021-02-19 19:24:02,386 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:24:02,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-02-19 19:24:02,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 1908. [2021-02-19 19:24:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 2.91767173571054) internal successors, (5564), 1907 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 5564 transitions. [2021-02-19 19:24:02,405 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 5564 transitions. Word has length 33 [2021-02-19 19:24:02,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:02,405 INFO L480 AbstractCegarLoop]: Abstraction has 1908 states and 5564 transitions. [2021-02-19 19:24:02,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:24:02,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 5564 transitions. [2021-02-19 19:24:02,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:02,407 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:02,407 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:02,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-02-19 19:24:02,607 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:02,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:02,607 INFO L82 PathProgramCache]: Analyzing trace with hash -772825890, now seen corresponding path program 54 times [2021-02-19 19:24:02,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:02,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137042187] [2021-02-19 19:24:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:02,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137042187] [2021-02-19 19:24:02,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240907794] [2021-02-19 19:24:02,738 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 [2021-02-19 19:24:02,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 19:24:02,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:02,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:24:02,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:02,844 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 5 treesize of output 3 [2021-02-19 19:24:02,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:02,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:02,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:02,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:24:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:03,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:03,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:24:03,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376873154] [2021-02-19 19:24:03,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:03,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:03,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:03,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:03,003 INFO L87 Difference]: Start difference. First operand 1908 states and 5564 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:03,718 INFO L93 Difference]: Finished difference Result 2798 states and 8083 transitions. [2021-02-19 19:24:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:24:03,719 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:24:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:03,722 INFO L225 Difference]: With dead ends: 2798 [2021-02-19 19:24:03,722 INFO L226 Difference]: Without dead ends: 2779 [2021-02-19 19:24:03,722 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:24:03,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2021-02-19 19:24:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 1900. [2021-02-19 19:24:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9152185360716167) internal successors, (5536), 1899 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:03,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5536 transitions. [2021-02-19 19:24:03,741 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5536 transitions. Word has length 33 [2021-02-19 19:24:03,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:03,741 INFO L480 AbstractCegarLoop]: Abstraction has 1900 states and 5536 transitions. [2021-02-19 19:24:03,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:03,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5536 transitions. [2021-02-19 19:24:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:03,743 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:03,743 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:03,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-02-19 19:24:03,943 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:03,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:03,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2052739826, now seen corresponding path program 55 times [2021-02-19 19:24:03,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:03,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470468300] [2021-02-19 19:24:03,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:04,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470468300] [2021-02-19 19:24:04,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249911768] [2021-02-19 19:24:04,093 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 [2021-02-19 19:24:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:04,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:24:04,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:04,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:04,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:24:04,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500009953] [2021-02-19 19:24:04,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:24:04,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:04,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:24:04,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:24:04,317 INFO L87 Difference]: Start difference. First operand 1900 states and 5536 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:24:05,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:05,291 INFO L93 Difference]: Finished difference Result 2680 states and 7637 transitions. [2021-02-19 19:24:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:24:05,291 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 [2021-02-19 19:24:05,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:05,294 INFO L225 Difference]: With dead ends: 2680 [2021-02-19 19:24:05,294 INFO L226 Difference]: Without dead ends: 2665 [2021-02-19 19:24:05,294 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:24:05,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-02-19 19:24:05,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1942. [2021-02-19 19:24:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 2.9206594538897477) internal successors, (5669), 1941 states have internal predecessors, (5669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 5669 transitions. [2021-02-19 19:24:05,314 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 5669 transitions. Word has length 33 [2021-02-19 19:24:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:05,314 INFO L480 AbstractCegarLoop]: Abstraction has 1942 states and 5669 transitions. [2021-02-19 19:24:05,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:24:05,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 5669 transitions. [2021-02-19 19:24:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:05,316 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:05,316 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:05,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:05,529 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:05,530 INFO L82 PathProgramCache]: Analyzing trace with hash -289069896, now seen corresponding path program 56 times [2021-02-19 19:24:05,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:05,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247680774] [2021-02-19 19:24:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:05,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247680774] [2021-02-19 19:24:05,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162003335] [2021-02-19 19:24:05,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:05,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:05,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:05,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:24:05,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:05,770 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 5 treesize of output 3 [2021-02-19 19:24:05,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:05,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:05,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:05,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:24:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:05,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:05,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:24:05,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313969274] [2021-02-19 19:24:05,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:05,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:05,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:05,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:05,922 INFO L87 Difference]: Start difference. First operand 1942 states and 5669 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:06,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:06,516 INFO L93 Difference]: Finished difference Result 2932 states and 8415 transitions. [2021-02-19 19:24:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:24:06,516 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:24:06,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:06,520 INFO L225 Difference]: With dead ends: 2932 [2021-02-19 19:24:06,520 INFO L226 Difference]: Without dead ends: 2917 [2021-02-19 19:24:06,520 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:24:06,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-02-19 19:24:06,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 1889. [2021-02-19 19:24:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 2.9152542372881354) internal successors, (5504), 1888 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 5504 transitions. [2021-02-19 19:24:06,540 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 5504 transitions. Word has length 33 [2021-02-19 19:24:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:06,540 INFO L480 AbstractCegarLoop]: Abstraction has 1889 states and 5504 transitions. [2021-02-19 19:24:06,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:06,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 5504 transitions. [2021-02-19 19:24:06,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:06,542 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:06,542 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:06,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-02-19 19:24:06,755 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:06,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:06,756 INFO L82 PathProgramCache]: Analyzing trace with hash -834768148, now seen corresponding path program 57 times [2021-02-19 19:24:06,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:06,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097246844] [2021-02-19 19:24:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:06,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097246844] [2021-02-19 19:24:06,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132452473] [2021-02-19 19:24:06,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:06,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:24:06,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:06,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:24:06,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:07,022 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 5 treesize of output 3 [2021-02-19 19:24:07,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:07,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:07,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:07,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:24:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:07,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:07,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:24:07,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671369027] [2021-02-19 19:24:07,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:07,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:07,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:07,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:07,196 INFO L87 Difference]: Start difference. First operand 1889 states and 5504 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:08,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:08,308 INFO L93 Difference]: Finished difference Result 2623 states and 7490 transitions. [2021-02-19 19:24:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:24:08,309 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:24:08,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:08,312 INFO L225 Difference]: With dead ends: 2623 [2021-02-19 19:24:08,312 INFO L226 Difference]: Without dead ends: 2608 [2021-02-19 19:24:08,312 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:24:08,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-02-19 19:24:08,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1893. [2021-02-19 19:24:08,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.9175475687103596) internal successors, (5520), 1892 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:08,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 5520 transitions. [2021-02-19 19:24:08,331 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 5520 transitions. Word has length 33 [2021-02-19 19:24:08,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:08,332 INFO L480 AbstractCegarLoop]: Abstraction has 1893 states and 5520 transitions. [2021-02-19 19:24:08,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:08,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 5520 transitions. [2021-02-19 19:24:08,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:08,333 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:08,333 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:08,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:08,534 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:08,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:08,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1710950612, now seen corresponding path program 58 times [2021-02-19 19:24:08,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:08,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257255237] [2021-02-19 19:24:08,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:08,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257255237] [2021-02-19 19:24:08,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276591397] [2021-02-19 19:24:08,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:24:08,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:08,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:08,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:08,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:08,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:08,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:24:08,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231826733] [2021-02-19 19:24:08,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:24:08,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:08,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:24:08,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:24:08,942 INFO L87 Difference]: Start difference. First operand 1893 states and 5520 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:24:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:09,707 INFO L93 Difference]: Finished difference Result 2900 states and 8334 transitions. [2021-02-19 19:24:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:24:09,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 [2021-02-19 19:24:09,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:09,711 INFO L225 Difference]: With dead ends: 2900 [2021-02-19 19:24:09,711 INFO L226 Difference]: Without dead ends: 2881 [2021-02-19 19:24:09,712 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:24:09,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2021-02-19 19:24:09,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 1881. [2021-02-19 19:24:09,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 2.9148936170212765) internal successors, (5480), 1880 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:09,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 5480 transitions. [2021-02-19 19:24:09,732 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 5480 transitions. Word has length 33 [2021-02-19 19:24:09,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:09,733 INFO L480 AbstractCegarLoop]: Abstraction has 1881 states and 5480 transitions. [2021-02-19 19:24:09,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:24:09,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 5480 transitions. [2021-02-19 19:24:09,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:09,734 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:09,735 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:09,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-02-19 19:24:09,935 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:09,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:09,935 INFO L82 PathProgramCache]: Analyzing trace with hash 158558282, now seen corresponding path program 59 times [2021-02-19 19:24:09,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:09,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944980672] [2021-02-19 19:24:09,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:10,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944980672] [2021-02-19 19:24:10,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699127703] [2021-02-19 19:24:10,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:10,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:10,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:10,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:24:10,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:10,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:10,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:24:10,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242060469] [2021-02-19 19:24:10,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:24:10,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:10,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:24:10,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:24:10,316 INFO L87 Difference]: Start difference. First operand 1881 states and 5480 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:24:11,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:11,197 INFO L93 Difference]: Finished difference Result 2510 states and 7169 transitions. [2021-02-19 19:24:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:24:11,197 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 [2021-02-19 19:24:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:11,200 INFO L225 Difference]: With dead ends: 2510 [2021-02-19 19:24:11,200 INFO L226 Difference]: Without dead ends: 2495 [2021-02-19 19:24:11,200 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:24:11,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-02-19 19:24:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 1902. [2021-02-19 19:24:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.923198316675434) internal successors, (5557), 1901 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5557 transitions. [2021-02-19 19:24:11,220 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5557 transitions. Word has length 33 [2021-02-19 19:24:11,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:11,220 INFO L480 AbstractCegarLoop]: Abstraction has 1902 states and 5557 transitions. [2021-02-19 19:24:11,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-02-19 19:24:11,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5557 transitions. [2021-02-19 19:24:11,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:11,222 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:11,222 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:11,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:11,436 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:11,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:11,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1922228212, now seen corresponding path program 60 times [2021-02-19 19:24:11,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:11,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231200838] [2021-02-19 19:24:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:11,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231200838] [2021-02-19 19:24:11,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616778233] [2021-02-19 19:24:11,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:11,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:24:11,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:11,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 19:24:11,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:11,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:11,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:24:11,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709194801] [2021-02-19 19:24:11,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:11,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:11,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:11,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:11,871 INFO L87 Difference]: Start difference. First operand 1902 states and 5557 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:12,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:12,609 INFO L93 Difference]: Finished difference Result 2848 states and 8175 transitions. [2021-02-19 19:24:12,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:24:12,609 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:24:12,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:12,613 INFO L225 Difference]: With dead ends: 2848 [2021-02-19 19:24:12,613 INFO L226 Difference]: Without dead ends: 2833 [2021-02-19 19:24:12,613 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:24:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-02-19 19:24:12,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 1784. [2021-02-19 19:24:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 2.9209197980931014) internal successors, (5208), 1783 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 5208 transitions. [2021-02-19 19:24:12,633 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 5208 transitions. Word has length 33 [2021-02-19 19:24:12,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:12,633 INFO L480 AbstractCegarLoop]: Abstraction has 1784 states and 5208 transitions. [2021-02-19 19:24:12,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:12,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 5208 transitions. [2021-02-19 19:24:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:12,635 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:12,635 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:12,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-02-19 19:24:12,849 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:12,850 INFO L82 PathProgramCache]: Analyzing trace with hash -519112046, now seen corresponding path program 61 times [2021-02-19 19:24:12,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:12,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135669724] [2021-02-19 19:24:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:12,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135669724] [2021-02-19 19:24:12,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:24:12,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 19:24:12,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446028980] [2021-02-19 19:24:12,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 19:24:12,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:12,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 19:24:12,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:24:12,866 INFO L87 Difference]: Start difference. First operand 1784 states and 5208 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 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) [2021-02-19 19:24:12,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:12,871 INFO L93 Difference]: Finished difference Result 1474 states and 4216 transitions. [2021-02-19 19:24:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 19:24:12,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 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 33 [2021-02-19 19:24:12,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:12,873 INFO L225 Difference]: With dead ends: 1474 [2021-02-19 19:24:12,873 INFO L226 Difference]: Without dead ends: 1474 [2021-02-19 19:24:12,874 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:24:12,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-02-19 19:24:12,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2021-02-19 19:24:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 2.8621860149355056) internal successors, (4216), 1473 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4216 transitions. [2021-02-19 19:24:12,893 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4216 transitions. Word has length 33 [2021-02-19 19:24:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:12,893 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 4216 transitions. [2021-02-19 19:24:12,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 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) [2021-02-19 19:24:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4216 transitions. [2021-02-19 19:24:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:12,895 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:12,895 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:12,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-02-19 19:24:12,895 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:12,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:12,895 INFO L82 PathProgramCache]: Analyzing trace with hash 248850982, now seen corresponding path program 62 times [2021-02-19 19:24:12,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:12,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425203661] [2021-02-19 19:24:12,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:13,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425203661] [2021-02-19 19:24:13,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614922718] [2021-02-19 19:24:13,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:13,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:13,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:13,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:24:13,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:13,184 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 5 treesize of output 3 [2021-02-19 19:24:13,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:13,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:13,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:13,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:24:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:13,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:13,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:24:13,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316547437] [2021-02-19 19:24:13,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:13,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:13,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:13,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:13,282 INFO L87 Difference]: Start difference. First operand 1474 states and 4216 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:13,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:13,730 INFO L93 Difference]: Finished difference Result 2467 states and 6892 transitions. [2021-02-19 19:24:13,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:24:13,730 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:24:13,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:13,733 INFO L225 Difference]: With dead ends: 2467 [2021-02-19 19:24:13,733 INFO L226 Difference]: Without dead ends: 2452 [2021-02-19 19:24:13,733 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:24:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-02-19 19:24:13,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1513. [2021-02-19 19:24:13,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 2.8624338624338623) internal successors, (4328), 1512 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 4328 transitions. [2021-02-19 19:24:13,751 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 4328 transitions. Word has length 33 [2021-02-19 19:24:13,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:13,751 INFO L480 AbstractCegarLoop]: Abstraction has 1513 states and 4328 transitions. [2021-02-19 19:24:13,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:13,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 4328 transitions. [2021-02-19 19:24:13,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:13,752 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:13,752 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:13,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:13,953 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:13,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:13,953 INFO L82 PathProgramCache]: Analyzing trace with hash 356301350, now seen corresponding path program 63 times [2021-02-19 19:24:13,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:13,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277519611] [2021-02-19 19:24:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:14,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277519611] [2021-02-19 19:24:14,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26725328] [2021-02-19 19:24:14,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:14,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:24:14,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:14,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:24:14,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:14,242 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 5 treesize of output 3 [2021-02-19 19:24:14,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:14,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:14,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:14,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-02-19 19:24:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:14,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:14,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:24:14,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758694959] [2021-02-19 19:24:14,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:14,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:14,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:14,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:14,401 INFO L87 Difference]: Start difference. First operand 1513 states and 4328 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:15,237 INFO L93 Difference]: Finished difference Result 2081 states and 5793 transitions. [2021-02-19 19:24:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:24:15,238 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:24:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:15,240 INFO L225 Difference]: With dead ends: 2081 [2021-02-19 19:24:15,240 INFO L226 Difference]: Without dead ends: 2066 [2021-02-19 19:24:15,240 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:24:15,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-02-19 19:24:15,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1525. [2021-02-19 19:24:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 2.8661417322834644) internal successors, (4368), 1524 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:15,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 4368 transitions. [2021-02-19 19:24:15,266 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 4368 transitions. Word has length 33 [2021-02-19 19:24:15,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:15,266 INFO L480 AbstractCegarLoop]: Abstraction has 1525 states and 4368 transitions. [2021-02-19 19:24:15,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:15,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 4368 transitions. [2021-02-19 19:24:15,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:15,268 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:15,268 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:15,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-02-19 19:24:15,469 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:15,469 INFO L82 PathProgramCache]: Analyzing trace with hash -519881114, now seen corresponding path program 64 times [2021-02-19 19:24:15,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:15,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194213425] [2021-02-19 19:24:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:15,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194213425] [2021-02-19 19:24:15,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018956] [2021-02-19 19:24:15,617 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:24:15,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:15,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:15,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:15,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:15,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:15,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:24:15,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36503074] [2021-02-19 19:24:15,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:24:15,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:15,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:24:15,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:15,886 INFO L87 Difference]: Start difference. First operand 1525 states and 4368 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:16,524 INFO L93 Difference]: Finished difference Result 2367 states and 6619 transitions. [2021-02-19 19:24:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:24:16,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-02-19 19:24:16,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:16,527 INFO L225 Difference]: With dead ends: 2367 [2021-02-19 19:24:16,527 INFO L226 Difference]: Without dead ends: 2348 [2021-02-19 19:24:16,527 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:24:16,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-02-19 19:24:16,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1521. [2021-02-19 19:24:16,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.863157894736842) internal successors, (4352), 1520 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4352 transitions. [2021-02-19 19:24:16,546 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4352 transitions. Word has length 33 [2021-02-19 19:24:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:16,546 INFO L480 AbstractCegarLoop]: Abstraction has 1521 states and 4352 transitions. [2021-02-19 19:24:16,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4352 transitions. [2021-02-19 19:24:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:16,547 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:16,547 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:16,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:16,758 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:16,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:16,758 INFO L82 PathProgramCache]: Analyzing trace with hash -378165974, now seen corresponding path program 65 times [2021-02-19 19:24:16,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:16,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410203466] [2021-02-19 19:24:16,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:16,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410203466] [2021-02-19 19:24:16,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668443838] [2021-02-19 19:24:16,906 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 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 [2021-02-19 19:24:16,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:16,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:16,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:24:16,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:17,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:17,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:24:17,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085807709] [2021-02-19 19:24:17,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:24:17,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:17,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:24:17,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:17,153 INFO L87 Difference]: Start difference. First operand 1521 states and 4352 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:17,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:17,914 INFO L93 Difference]: Finished difference Result 2637 states and 7354 transitions. [2021-02-19 19:24:17,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:24:17,915 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-02-19 19:24:17,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:17,918 INFO L225 Difference]: With dead ends: 2637 [2021-02-19 19:24:17,918 INFO L226 Difference]: Without dead ends: 2622 [2021-02-19 19:24:17,918 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:24:17,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-02-19 19:24:17,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 1527. [2021-02-19 19:24:17,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8636959370904327) internal successors, (4370), 1526 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4370 transitions. [2021-02-19 19:24:17,936 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4370 transitions. Word has length 33 [2021-02-19 19:24:17,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:17,936 INFO L480 AbstractCegarLoop]: Abstraction has 1527 states and 4370 transitions. [2021-02-19 19:24:17,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:17,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4370 transitions. [2021-02-19 19:24:17,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:17,937 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:17,937 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:18,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-02-19 19:24:18,138 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:18,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:18,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1661313434, now seen corresponding path program 66 times [2021-02-19 19:24:18,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:18,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695094091] [2021-02-19 19:24:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:18,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695094091] [2021-02-19 19:24:18,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366955932] [2021-02-19 19:24:18,282 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 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 [2021-02-19 19:24:18,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 19:24:18,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:18,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:24:18,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:18,413 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 5 treesize of output 3 [2021-02-19 19:24:18,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:18,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:18,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:18,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-02-19 19:24:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:18,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:18,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:24:18,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595390875] [2021-02-19 19:24:18,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:18,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:18,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:18,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:18,542 INFO L87 Difference]: Start difference. First operand 1527 states and 4370 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:19,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:19,161 INFO L93 Difference]: Finished difference Result 2636 states and 7339 transitions. [2021-02-19 19:24:19,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:24:19,162 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:24:19,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:19,165 INFO L225 Difference]: With dead ends: 2636 [2021-02-19 19:24:19,165 INFO L226 Difference]: Without dead ends: 2621 [2021-02-19 19:24:19,165 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:24:19,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2021-02-19 19:24:19,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 1507. [2021-02-19 19:24:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 2.861885790172643) internal successors, (4310), 1506 states have internal predecessors, (4310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 4310 transitions. [2021-02-19 19:24:19,182 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 4310 transitions. Word has length 33 [2021-02-19 19:24:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:19,182 INFO L480 AbstractCegarLoop]: Abstraction has 1507 states and 4310 transitions. [2021-02-19 19:24:19,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 4310 transitions. [2021-02-19 19:24:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:19,183 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:19,183 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:19,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-02-19 19:24:19,384 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:19,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:19,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1439434202, now seen corresponding path program 67 times [2021-02-19 19:24:19,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:19,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9408906] [2021-02-19 19:24:19,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:19,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9408906] [2021-02-19 19:24:19,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603106320] [2021-02-19 19:24:19,527 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 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 [2021-02-19 19:24:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:19,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:24:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:19,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:19,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:24:19,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666855019] [2021-02-19 19:24:19,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:24:19,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:19,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:24:19,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:19,762 INFO L87 Difference]: Start difference. First operand 1507 states and 4310 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:20,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:20,257 INFO L93 Difference]: Finished difference Result 2483 states and 6920 transitions. [2021-02-19 19:24:20,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:24:20,257 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-02-19 19:24:20,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:20,260 INFO L225 Difference]: With dead ends: 2483 [2021-02-19 19:24:20,260 INFO L226 Difference]: Without dead ends: 2468 [2021-02-19 19:24:20,260 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:24:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2021-02-19 19:24:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 1576. [2021-02-19 19:24:20,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.843809523809524) internal successors, (4479), 1575 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 4479 transitions. [2021-02-19 19:24:20,277 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 4479 transitions. Word has length 33 [2021-02-19 19:24:20,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:20,277 INFO L480 AbstractCegarLoop]: Abstraction has 1576 states and 4479 transitions. [2021-02-19 19:24:20,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:20,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 4479 transitions. [2021-02-19 19:24:20,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:20,278 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:20,278 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:20,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-02-19 19:24:20,479 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:20,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:20,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1413365326, now seen corresponding path program 68 times [2021-02-19 19:24:20,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:20,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893002310] [2021-02-19 19:24:20,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:20,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893002310] [2021-02-19 19:24:20,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074047839] [2021-02-19 19:24:20,625 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 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 [2021-02-19 19:24:20,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:20,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:20,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:24:20,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:20,765 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 5 treesize of output 3 [2021-02-19 19:24:20,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:20,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:20,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:20,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-02-19 19:24:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:20,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:20,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:24:20,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017969007] [2021-02-19 19:24:20,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:20,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:20,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:20,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:20,914 INFO L87 Difference]: Start difference. First operand 1576 states and 4479 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:21,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:21,740 INFO L93 Difference]: Finished difference Result 2059 states and 5724 transitions. [2021-02-19 19:24:21,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:24:21,740 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:24:21,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:21,743 INFO L225 Difference]: With dead ends: 2059 [2021-02-19 19:24:21,743 INFO L226 Difference]: Without dead ends: 2044 [2021-02-19 19:24:21,743 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:24:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-02-19 19:24:21,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1594. [2021-02-19 19:24:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 2.8455743879472695) internal successors, (4533), 1593 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4533 transitions. [2021-02-19 19:24:21,759 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4533 transitions. Word has length 33 [2021-02-19 19:24:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:21,759 INFO L480 AbstractCegarLoop]: Abstraction has 1594 states and 4533 transitions. [2021-02-19 19:24:21,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:21,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4533 transitions. [2021-02-19 19:24:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:21,761 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:21,761 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:21,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:21,961 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:21,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:21,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1642124170, now seen corresponding path program 69 times [2021-02-19 19:24:21,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:21,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785760752] [2021-02-19 19:24:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:22,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785760752] [2021-02-19 19:24:22,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597130331] [2021-02-19 19:24:22,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:24:22,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:24:22,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:22,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 19:24:22,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:22,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:22,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:24:22,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335570771] [2021-02-19 19:24:22,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:22,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:22,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:22,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:22,365 INFO L87 Difference]: Start difference. First operand 1594 states and 4533 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:22,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:22,851 INFO L93 Difference]: Finished difference Result 2345 states and 6550 transitions. [2021-02-19 19:24:22,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:24:22,852 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:24:22,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:22,854 INFO L225 Difference]: With dead ends: 2345 [2021-02-19 19:24:22,854 INFO L226 Difference]: Without dead ends: 2330 [2021-02-19 19:24:22,855 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:24:22,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-02-19 19:24:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1588. [2021-02-19 19:24:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 2.8424700693131695) internal successors, (4511), 1587 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:22,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 4511 transitions. [2021-02-19 19:24:22,871 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 4511 transitions. Word has length 33 [2021-02-19 19:24:22,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:22,871 INFO L480 AbstractCegarLoop]: Abstraction has 1588 states and 4511 transitions. [2021-02-19 19:24:22,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:22,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 4511 transitions. [2021-02-19 19:24:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:22,872 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:22,873 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:23,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:23,073 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:23,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1706111326, now seen corresponding path program 70 times [2021-02-19 19:24:23,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:23,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714493036] [2021-02-19 19:24:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:23,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714493036] [2021-02-19 19:24:23,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140085473] [2021-02-19 19:24:23,217 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 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 [2021-02-19 19:24:23,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:23,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:23,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:24:23,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:23,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:23,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:24:23,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833448946] [2021-02-19 19:24:23,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:24:23,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:23,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:24:23,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:23,460 INFO L87 Difference]: Start difference. First operand 1588 states and 4511 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:24,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:24,091 INFO L93 Difference]: Finished difference Result 2502 states and 6967 transitions. [2021-02-19 19:24:24,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:24:24,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-02-19 19:24:24,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:24,094 INFO L225 Difference]: With dead ends: 2502 [2021-02-19 19:24:24,094 INFO L226 Difference]: Without dead ends: 2487 [2021-02-19 19:24:24,094 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:24:24,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-02-19 19:24:24,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1594. [2021-02-19 19:24:24,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 2.84180790960452) internal successors, (4527), 1593 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4527 transitions. [2021-02-19 19:24:24,111 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4527 transitions. Word has length 33 [2021-02-19 19:24:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:24,111 INFO L480 AbstractCegarLoop]: Abstraction has 1594 states and 4527 transitions. [2021-02-19 19:24:24,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:24,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4527 transitions. [2021-02-19 19:24:24,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:24,113 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:24,113 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:24,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:24,314 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:24,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:24,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1551673808, now seen corresponding path program 71 times [2021-02-19 19:24:24,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:24,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581540916] [2021-02-19 19:24:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:24,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581540916] [2021-02-19 19:24:24,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912184389] [2021-02-19 19:24:24,467 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 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 [2021-02-19 19:24:24,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:24,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:24,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:24:24,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:24,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:24,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:24:24,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591508645] [2021-02-19 19:24:24,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:24:24,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:24,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:24:24,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:24,727 INFO L87 Difference]: Start difference. First operand 1594 states and 4527 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:25,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:25,330 INFO L93 Difference]: Finished difference Result 2501 states and 6968 transitions. [2021-02-19 19:24:25,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:24:25,331 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-02-19 19:24:25,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:25,334 INFO L225 Difference]: With dead ends: 2501 [2021-02-19 19:24:25,334 INFO L226 Difference]: Without dead ends: 2486 [2021-02-19 19:24:25,334 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:24:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-02-19 19:24:25,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1519. [2021-02-19 19:24:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.86034255599473) internal successors, (4342), 1518 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4342 transitions. [2021-02-19 19:24:25,350 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4342 transitions. Word has length 33 [2021-02-19 19:24:25,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:25,350 INFO L480 AbstractCegarLoop]: Abstraction has 1519 states and 4342 transitions. [2021-02-19 19:24:25,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:25,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4342 transitions. [2021-02-19 19:24:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:25,352 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:25,352 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:25,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-02-19 19:24:25,552 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:25,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:25,552 INFO L82 PathProgramCache]: Analyzing trace with hash 28286438, now seen corresponding path program 72 times [2021-02-19 19:24:25,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:25,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016404254] [2021-02-19 19:24:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:25,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016404254] [2021-02-19 19:24:25,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053597266] [2021-02-19 19:24:25,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:24:25,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 19:24:25,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:25,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:24:25,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:25,804 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 5 treesize of output 3 [2021-02-19 19:24:25,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:25,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:25,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:25,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:24:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:25,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:25,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:24:25,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452156540] [2021-02-19 19:24:25,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:25,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:25,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:25,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:25,984 INFO L87 Difference]: Start difference. First operand 1519 states and 4342 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:26,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:26,807 INFO L93 Difference]: Finished difference Result 1859 states and 5232 transitions. [2021-02-19 19:24:26,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:24:26,807 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:24:26,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:26,810 INFO L225 Difference]: With dead ends: 1859 [2021-02-19 19:24:26,810 INFO L226 Difference]: Without dead ends: 1844 [2021-02-19 19:24:26,810 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:24:26,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-02-19 19:24:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1527. [2021-02-19 19:24:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.865006553079948) internal successors, (4372), 1526 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:26,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4372 transitions. [2021-02-19 19:24:26,824 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4372 transitions. Word has length 33 [2021-02-19 19:24:26,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:26,824 INFO L480 AbstractCegarLoop]: Abstraction has 1527 states and 4372 transitions. [2021-02-19 19:24:26,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:26,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4372 transitions. [2021-02-19 19:24:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:26,825 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:26,825 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:27,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:27,026 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:27,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:27,026 INFO L82 PathProgramCache]: Analyzing trace with hash -847896026, now seen corresponding path program 73 times [2021-02-19 19:24:27,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:27,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169574891] [2021-02-19 19:24:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:27,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169574891] [2021-02-19 19:24:27,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574633896] [2021-02-19 19:24:27,159 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 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 [2021-02-19 19:24:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:27,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:24:27,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:27,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:27,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:24:27,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366662497] [2021-02-19 19:24:27,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:24:27,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:27,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:24:27,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:27,413 INFO L87 Difference]: Start difference. First operand 1527 states and 4372 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:28,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:28,273 INFO L93 Difference]: Finished difference Result 1887 states and 5291 transitions. [2021-02-19 19:24:28,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:24:28,273 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-02-19 19:24:28,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:28,275 INFO L225 Difference]: With dead ends: 1887 [2021-02-19 19:24:28,275 INFO L226 Difference]: Without dead ends: 1868 [2021-02-19 19:24:28,275 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:24:28,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2021-02-19 19:24:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1523. [2021-02-19 19:24:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2021-02-19 19:24:28,290 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2021-02-19 19:24:28,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:28,290 INFO L480 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2021-02-19 19:24:28,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2021-02-19 19:24:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:28,291 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:28,291 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:28,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:28,491 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:28,492 INFO L82 PathProgramCache]: Analyzing trace with hash 396151334, now seen corresponding path program 74 times [2021-02-19 19:24:28,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:28,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084218130] [2021-02-19 19:24:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:28,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084218130] [2021-02-19 19:24:28,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915372725] [2021-02-19 19:24:28,651 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 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 [2021-02-19 19:24:28,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:28,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:28,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:24:28,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:28,766 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 5 treesize of output 3 [2021-02-19 19:24:28,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:28,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:28,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:28,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:24:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:28,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:28,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:24:28,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884953024] [2021-02-19 19:24:28,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:28,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:28,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:28,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:28,938 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:29,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:29,693 INFO L93 Difference]: Finished difference Result 1849 states and 5192 transitions. [2021-02-19 19:24:29,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:24:29,694 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:24:29,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:29,696 INFO L225 Difference]: With dead ends: 1849 [2021-02-19 19:24:29,696 INFO L226 Difference]: Without dead ends: 1834 [2021-02-19 19:24:29,696 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:24:29,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-02-19 19:24:29,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1529. [2021-02-19 19:24:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.865183246073298) internal successors, (4378), 1528 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:29,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4378 transitions. [2021-02-19 19:24:29,710 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4378 transitions. Word has length 33 [2021-02-19 19:24:29,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:29,711 INFO L480 AbstractCegarLoop]: Abstraction has 1529 states and 4378 transitions. [2021-02-19 19:24:29,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:29,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4378 transitions. [2021-02-19 19:24:29,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:29,712 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:29,712 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:29,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:29,912 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:29,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:29,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2135146032, now seen corresponding path program 75 times [2021-02-19 19:24:29,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:29,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371850070] [2021-02-19 19:24:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:30,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371850070] [2021-02-19 19:24:30,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358782567] [2021-02-19 19:24:30,055 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 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 [2021-02-19 19:24:30,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:24:30,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:30,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 19:24:30,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:30,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:30,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:24:30,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235087142] [2021-02-19 19:24:30,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:30,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:30,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:30,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:30,323 INFO L87 Difference]: Start difference. First operand 1529 states and 4378 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:31,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:31,072 INFO L93 Difference]: Finished difference Result 1873 states and 5237 transitions. [2021-02-19 19:24:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:24:31,072 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:24:31,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:31,074 INFO L225 Difference]: With dead ends: 1873 [2021-02-19 19:24:31,074 INFO L226 Difference]: Without dead ends: 1858 [2021-02-19 19:24:31,075 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:24:31,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-02-19 19:24:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1523. [2021-02-19 19:24:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2021-02-19 19:24:31,089 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2021-02-19 19:24:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:31,089 INFO L480 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2021-02-19 19:24:31,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:31,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2021-02-19 19:24:31,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:31,091 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:31,091 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:31,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-02-19 19:24:31,291 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:31,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:31,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2074849690, now seen corresponding path program 76 times [2021-02-19 19:24:31,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:31,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465112340] [2021-02-19 19:24:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:31,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465112340] [2021-02-19 19:24:31,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157985550] [2021-02-19 19:24:31,433 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:31,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:31,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:31,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:24:31,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:31,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:31,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:24:31,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163765665] [2021-02-19 19:24:31,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:24:31,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:31,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:24:31,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:31,675 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:32,183 INFO L93 Difference]: Finished difference Result 2021 states and 5714 transitions. [2021-02-19 19:24:32,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:24:32,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-02-19 19:24:32,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:32,186 INFO L225 Difference]: With dead ends: 2021 [2021-02-19 19:24:32,186 INFO L226 Difference]: Without dead ends: 2002 [2021-02-19 19:24:32,186 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:24:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-02-19 19:24:32,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1527. [2021-02-19 19:24:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8610747051114025) internal successors, (4366), 1526 states have internal predecessors, (4366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4366 transitions. [2021-02-19 19:24:32,201 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4366 transitions. Word has length 33 [2021-02-19 19:24:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:32,202 INFO L480 AbstractCegarLoop]: Abstraction has 1527 states and 4366 transitions. [2021-02-19 19:24:32,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:32,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4366 transitions. [2021-02-19 19:24:32,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:32,203 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:32,203 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:32,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:32,404 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:32,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:32,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1612679846, now seen corresponding path program 77 times [2021-02-19 19:24:32,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:32,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088676758] [2021-02-19 19:24:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:32,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088676758] [2021-02-19 19:24:32,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355931562] [2021-02-19 19:24:32,536 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 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 [2021-02-19 19:24:32,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:24:32,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:32,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:24:32,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:32,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:32,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:24:32,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502497648] [2021-02-19 19:24:32,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:24:32,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:32,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:24:32,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:32,782 INFO L87 Difference]: Start difference. First operand 1527 states and 4366 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:33,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:33,303 INFO L93 Difference]: Finished difference Result 2017 states and 5700 transitions. [2021-02-19 19:24:33,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:24:33,304 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-02-19 19:24:33,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:33,306 INFO L225 Difference]: With dead ends: 2017 [2021-02-19 19:24:33,306 INFO L226 Difference]: Without dead ends: 2002 [2021-02-19 19:24:33,306 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:24:33,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-02-19 19:24:33,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1521. [2021-02-19 19:24:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.860526315789474) internal successors, (4348), 1520 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4348 transitions. [2021-02-19 19:24:33,321 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4348 transitions. Word has length 33 [2021-02-19 19:24:33,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:33,321 INFO L480 AbstractCegarLoop]: Abstraction has 1521 states and 4348 transitions. [2021-02-19 19:24:33,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:33,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4348 transitions. [2021-02-19 19:24:33,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:33,322 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:33,322 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:33,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-02-19 19:24:33,523 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:33,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:33,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2145124678, now seen corresponding path program 78 times [2021-02-19 19:24:33,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:33,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226745962] [2021-02-19 19:24:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:33,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226745962] [2021-02-19 19:24:33,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389852687] [2021-02-19 19:24:33,666 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 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 [2021-02-19 19:24:33,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 19:24:33,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:33,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:24:33,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:33,776 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 5 treesize of output 3 [2021-02-19 19:24:33,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:33,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:33,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:33,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:24:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:33,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:33,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:24:33,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144718601] [2021-02-19 19:24:33,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:33,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:33,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:33,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:33,950 INFO L87 Difference]: Start difference. First operand 1521 states and 4348 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:35,058 INFO L93 Difference]: Finished difference Result 2105 states and 5893 transitions. [2021-02-19 19:24:35,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:24:35,059 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:24:35,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:35,061 INFO L225 Difference]: With dead ends: 2105 [2021-02-19 19:24:35,061 INFO L226 Difference]: Without dead ends: 2075 [2021-02-19 19:24:35,061 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 19:24:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-02-19 19:24:35,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1529. [2021-02-19 19:24:35,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.863874345549738) internal successors, (4376), 1528 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4376 transitions. [2021-02-19 19:24:35,076 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4376 transitions. Word has length 33 [2021-02-19 19:24:35,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:35,076 INFO L480 AbstractCegarLoop]: Abstraction has 1529 states and 4376 transitions. [2021-02-19 19:24:35,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:35,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4376 transitions. [2021-02-19 19:24:35,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:35,078 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:35,078 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:35,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:35,278 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:35,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:35,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1273660154, now seen corresponding path program 79 times [2021-02-19 19:24:35,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:35,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888979103] [2021-02-19 19:24:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:35,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888979103] [2021-02-19 19:24:35,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524297374] [2021-02-19 19:24:35,426 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 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 [2021-02-19 19:24:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:35,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:24:35,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:35,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:35,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:24:35,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933659144] [2021-02-19 19:24:35,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:24:35,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:35,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:24:35,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:35,667 INFO L87 Difference]: Start difference. First operand 1529 states and 4376 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:36,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:36,451 INFO L93 Difference]: Finished difference Result 2290 states and 6454 transitions. [2021-02-19 19:24:36,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:24:36,452 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-02-19 19:24:36,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:36,454 INFO L225 Difference]: With dead ends: 2290 [2021-02-19 19:24:36,455 INFO L226 Difference]: Without dead ends: 2271 [2021-02-19 19:24:36,455 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:24:36,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2021-02-19 19:24:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1521. [2021-02-19 19:24:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.860526315789474) internal successors, (4348), 1520 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:36,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4348 transitions. [2021-02-19 19:24:36,476 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4348 transitions. Word has length 33 [2021-02-19 19:24:36,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:36,476 INFO L480 AbstractCegarLoop]: Abstraction has 1521 states and 4348 transitions. [2021-02-19 19:24:36,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:36,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4348 transitions. [2021-02-19 19:24:36,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:36,478 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:36,478 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:36,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:36,678 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:36,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:36,678 INFO L82 PathProgramCache]: Analyzing trace with hash -6253782, now seen corresponding path program 80 times [2021-02-19 19:24:36,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:36,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684563799] [2021-02-19 19:24:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:36,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684563799] [2021-02-19 19:24:36,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883688524] [2021-02-19 19:24:36,820 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 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 [2021-02-19 19:24:36,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:36,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:36,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:24:36,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:36,933 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 5 treesize of output 3 [2021-02-19 19:24:36,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:36,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:36,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:36,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:24:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:37,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:37,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:24:37,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949506636] [2021-02-19 19:24:37,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:37,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:37,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:37,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:37,098 INFO L87 Difference]: Start difference. First operand 1521 states and 4348 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:38,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:38,267 INFO L93 Difference]: Finished difference Result 2089 states and 5825 transitions. [2021-02-19 19:24:38,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:24:38,268 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:24:38,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:38,270 INFO L225 Difference]: With dead ends: 2089 [2021-02-19 19:24:38,270 INFO L226 Difference]: Without dead ends: 2059 [2021-02-19 19:24:38,270 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 19:24:38,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-02-19 19:24:38,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1533. [2021-02-19 19:24:38,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 2.862924281984334) internal successors, (4386), 1532 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:38,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 4386 transitions. [2021-02-19 19:24:38,285 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 4386 transitions. Word has length 33 [2021-02-19 19:24:38,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:38,285 INFO L480 AbstractCegarLoop]: Abstraction has 1533 states and 4386 transitions. [2021-02-19 19:24:38,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:38,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 4386 transitions. [2021-02-19 19:24:38,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:38,286 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:38,286 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:38,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:38,486 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:38,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:38,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1757416148, now seen corresponding path program 81 times [2021-02-19 19:24:38,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:38,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243730245] [2021-02-19 19:24:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:38,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243730245] [2021-02-19 19:24:38,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779654135] [2021-02-19 19:24:38,626 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 [2021-02-19 19:24:38,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:24:38,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:38,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 19:24:38,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:38,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:38,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:24:38,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322951535] [2021-02-19 19:24:38,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:38,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:38,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:38,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:38,883 INFO L87 Difference]: Start difference. First operand 1533 states and 4386 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:39,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:39,553 INFO L93 Difference]: Finished difference Result 2274 states and 6386 transitions. [2021-02-19 19:24:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:24:39,554 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:24:39,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:39,556 INFO L225 Difference]: With dead ends: 2274 [2021-02-19 19:24:39,556 INFO L226 Difference]: Without dead ends: 2259 [2021-02-19 19:24:39,556 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:24:39,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-02-19 19:24:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1519. [2021-02-19 19:24:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.86034255599473) internal successors, (4342), 1518 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:39,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4342 transitions. [2021-02-19 19:24:39,572 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4342 transitions. Word has length 33 [2021-02-19 19:24:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:39,572 INFO L480 AbstractCegarLoop]: Abstraction has 1519 states and 4342 transitions. [2021-02-19 19:24:39,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4342 transitions. [2021-02-19 19:24:39,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:39,573 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:39,573 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:39,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:39,773 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:39,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:39,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1211717896, now seen corresponding path program 82 times [2021-02-19 19:24:39,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:39,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660491181] [2021-02-19 19:24:39,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:39,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660491181] [2021-02-19 19:24:39,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123409790] [2021-02-19 19:24:39,923 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 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 [2021-02-19 19:24:39,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:39,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:39,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:24:39,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:40,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:40,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:24:40,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437346241] [2021-02-19 19:24:40,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:24:40,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:40,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:24:40,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:40,184 INFO L87 Difference]: Start difference. First operand 1519 states and 4342 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:41,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:41,235 INFO L93 Difference]: Finished difference Result 2065 states and 5781 transitions. [2021-02-19 19:24:41,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:24:41,236 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-02-19 19:24:41,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:41,238 INFO L225 Difference]: With dead ends: 2065 [2021-02-19 19:24:41,238 INFO L226 Difference]: Without dead ends: 2050 [2021-02-19 19:24:41,238 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:24:41,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2021-02-19 19:24:41,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1523. [2021-02-19 19:24:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.863337713534823) internal successors, (4358), 1522 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4358 transitions. [2021-02-19 19:24:41,254 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4358 transitions. Word has length 33 [2021-02-19 19:24:41,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:41,254 INFO L480 AbstractCegarLoop]: Abstraction has 1523 states and 4358 transitions. [2021-02-19 19:24:41,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:41,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4358 transitions. [2021-02-19 19:24:41,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:41,255 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:41,255 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:41,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:41,470 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:41,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:41,470 INFO L82 PathProgramCache]: Analyzing trace with hash 335535432, now seen corresponding path program 83 times [2021-02-19 19:24:41,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:41,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765168026] [2021-02-19 19:24:41,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:41,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765168026] [2021-02-19 19:24:41,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720267003] [2021-02-19 19:24:41,612 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 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 [2021-02-19 19:24:41,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:41,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:41,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:24:41,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:41,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:41,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:24:41,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615617339] [2021-02-19 19:24:41,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:24:41,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:41,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:24:41,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:41,860 INFO L87 Difference]: Start difference. First operand 1523 states and 4358 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:42,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:42,583 INFO L93 Difference]: Finished difference Result 2437 states and 6835 transitions. [2021-02-19 19:24:42,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:24:42,584 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-02-19 19:24:42,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:42,587 INFO L225 Difference]: With dead ends: 2437 [2021-02-19 19:24:42,587 INFO L226 Difference]: Without dead ends: 2418 [2021-02-19 19:24:42,587 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:24:42,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2418 states. [2021-02-19 19:24:42,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2418 to 1511. [2021-02-19 19:24:42,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 2.8596026490066224) internal successors, (4318), 1510 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 4318 transitions. [2021-02-19 19:24:42,603 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 4318 transitions. Word has length 33 [2021-02-19 19:24:42,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:42,603 INFO L480 AbstractCegarLoop]: Abstraction has 1511 states and 4318 transitions. [2021-02-19 19:24:42,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 4318 transitions. [2021-02-19 19:24:42,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:42,605 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:42,605 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:42,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:42,805 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:42,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:42,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2089922970, now seen corresponding path program 84 times [2021-02-19 19:24:42,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:42,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913072480] [2021-02-19 19:24:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:42,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913072480] [2021-02-19 19:24:42,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297979768] [2021-02-19 19:24:42,949 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:42,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 19:24:42,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:42,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:24:42,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:43,063 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 5 treesize of output 3 [2021-02-19 19:24:43,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:43,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:43,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:43,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-02-19 19:24:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:43,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:43,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-02-19 19:24:43,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683304744] [2021-02-19 19:24:43,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:24:43,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:43,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:24:43,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:43,230 INFO L87 Difference]: Start difference. First operand 1511 states and 4318 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:44,405 INFO L93 Difference]: Finished difference Result 2034 states and 5661 transitions. [2021-02-19 19:24:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:24:44,405 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 [2021-02-19 19:24:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:44,408 INFO L225 Difference]: With dead ends: 2034 [2021-02-19 19:24:44,408 INFO L226 Difference]: Without dead ends: 2019 [2021-02-19 19:24:44,408 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:24:44,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-02-19 19:24:44,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1517. [2021-02-19 19:24:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 2.862796833773087) internal successors, (4340), 1516 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 4340 transitions. [2021-02-19 19:24:44,422 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 4340 transitions. Word has length 33 [2021-02-19 19:24:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:44,422 INFO L480 AbstractCegarLoop]: Abstraction has 1517 states and 4340 transitions. [2021-02-19 19:24:44,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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) [2021-02-19 19:24:44,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 4340 transitions. [2021-02-19 19:24:44,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:24:44,424 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:44,424 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:44,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:44,624 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:44,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:44,624 INFO L82 PathProgramCache]: Analyzing trace with hash -326253040, now seen corresponding path program 85 times [2021-02-19 19:24:44,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:44,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904729750] [2021-02-19 19:24:44,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:44,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904729750] [2021-02-19 19:24:44,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954261307] [2021-02-19 19:24:44,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:44,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:24:44,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:45,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:45,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:24:45,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261721583] [2021-02-19 19:24:45,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:24:45,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:45,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:24:45,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:45,025 INFO L87 Difference]: Start difference. First operand 1517 states and 4340 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:45,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:45,689 INFO L93 Difference]: Finished difference Result 2295 states and 6421 transitions. [2021-02-19 19:24:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:24:45,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-02-19 19:24:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:45,692 INFO L225 Difference]: With dead ends: 2295 [2021-02-19 19:24:45,692 INFO L226 Difference]: Without dead ends: 2280 [2021-02-19 19:24:45,693 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:24:45,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-02-19 19:24:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1450. [2021-02-19 19:24:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 2.8612836438923397) internal successors, (4146), 1449 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:45,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 4146 transitions. [2021-02-19 19:24:45,708 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 4146 transitions. Word has length 33 [2021-02-19 19:24:45,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:45,708 INFO L480 AbstractCegarLoop]: Abstraction has 1450 states and 4146 transitions. [2021-02-19 19:24:45,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-02-19 19:24:45,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 4146 transitions. [2021-02-19 19:24:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:24:45,709 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:45,709 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:45,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-02-19 19:24:45,918 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:45,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:45,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1289613406, now seen corresponding path program 1 times [2021-02-19 19:24:45,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:45,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732318829] [2021-02-19 19:24:45,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:45,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732318829] [2021-02-19 19:24:45,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849487499] [2021-02-19 19:24:45,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:45,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:24:45,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:45,991 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 11 treesize of output 7 [2021-02-19 19:24:45,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:45,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:45,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:45,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 19:24:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:46,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:46,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 19:24:46,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440280209] [2021-02-19 19:24:46,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 19:24:46,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:46,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 19:24:46,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:24:46,027 INFO L87 Difference]: Start difference. First operand 1450 states and 4146 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) [2021-02-19 19:24:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:46,096 INFO L93 Difference]: Finished difference Result 1940 states and 5616 transitions. [2021-02-19 19:24:46,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 19:24:46,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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 37 [2021-02-19 19:24:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:46,099 INFO L225 Difference]: With dead ends: 1940 [2021-02-19 19:24:46,099 INFO L226 Difference]: Without dead ends: 1940 [2021-02-19 19:24:46,099 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:46,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-02-19 19:24:46,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1810. [2021-02-19 19:24:46,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 2.902155887230514) internal successors, (5250), 1809 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 5250 transitions. [2021-02-19 19:24:46,115 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 5250 transitions. Word has length 37 [2021-02-19 19:24:46,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:46,116 INFO L480 AbstractCegarLoop]: Abstraction has 1810 states and 5250 transitions. [2021-02-19 19:24:46,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) [2021-02-19 19:24:46,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 5250 transitions. [2021-02-19 19:24:46,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 19:24:46,117 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:46,117 INFO L506 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, 1, 1, 1, 1, 1] [2021-02-19 19:24:46,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:46,318 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:46,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:46,318 INFO L82 PathProgramCache]: Analyzing trace with hash 400980504, now seen corresponding path program 86 times [2021-02-19 19:24:46,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:46,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412519940] [2021-02-19 19:24:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:46,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412519940] [2021-02-19 19:24:46,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926190126] [2021-02-19 19:24:46,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:46,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:46,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:46,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 19:24:46,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:46,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:46,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-02-19 19:24:46,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261525225] [2021-02-19 19:24:46,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:24:46,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:46,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:24:46,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:24:46,429 INFO L87 Difference]: Start difference. First operand 1810 states and 5250 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:46,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:46,443 INFO L93 Difference]: Finished difference Result 2953 states and 8537 transitions. [2021-02-19 19:24:46,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 19:24:46,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 19:24:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:46,447 INFO L225 Difference]: With dead ends: 2953 [2021-02-19 19:24:46,447 INFO L226 Difference]: Without dead ends: 2856 [2021-02-19 19:24:46,447 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:24:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-02-19 19:24:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2284. [2021-02-19 19:24:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 2.9890494962768286) internal successors, (6824), 2283 states have internal predecessors, (6824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 6824 transitions. [2021-02-19 19:24:46,470 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 6824 transitions. Word has length 38 [2021-02-19 19:24:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:46,470 INFO L480 AbstractCegarLoop]: Abstraction has 2284 states and 6824 transitions. [2021-02-19 19:24:46,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:46,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 6824 transitions. [2021-02-19 19:24:46,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:24:46,473 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:46,473 INFO L506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:46,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-02-19 19:24:46,686 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:46,686 INFO L82 PathProgramCache]: Analyzing trace with hash -533673884, now seen corresponding path program 87 times [2021-02-19 19:24:46,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:46,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085567906] [2021-02-19 19:24:46,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:46,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085567906] [2021-02-19 19:24:46,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735295518] [2021-02-19 19:24:46,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:46,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:24:46,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:46,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 19:24:46,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:24:46,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 19:24:46,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-02-19 19:24:46,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613280544] [2021-02-19 19:24:46,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 19:24:46,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:46,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 19:24:46,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:24:46,783 INFO L87 Difference]: Start difference. First operand 2284 states and 6824 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 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) [2021-02-19 19:24:46,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:46,803 INFO L93 Difference]: Finished difference Result 6496 states and 19271 transitions. [2021-02-19 19:24:46,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 19:24:46,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 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 39 [2021-02-19 19:24:46,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:46,811 INFO L225 Difference]: With dead ends: 6496 [2021-02-19 19:24:46,811 INFO L226 Difference]: Without dead ends: 6091 [2021-02-19 19:24:46,811 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:24:46,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6091 states. [2021-02-19 19:24:46,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6091 to 5331. [2021-02-19 19:24:46,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5331 states, 5330 states have (on average 3.052908067542214) internal successors, (16272), 5330 states have internal predecessors, (16272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:46,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 16272 transitions. [2021-02-19 19:24:46,868 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 16272 transitions. Word has length 39 [2021-02-19 19:24:46,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:46,869 INFO L480 AbstractCegarLoop]: Abstraction has 5331 states and 16272 transitions. [2021-02-19 19:24:46,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 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) [2021-02-19 19:24:46,869 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 16272 transitions. [2021-02-19 19:24:46,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-19 19:24:46,873 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:46,874 INFO L506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:47,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:47,078 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:47,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:47,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1786877144, now seen corresponding path program 2 times [2021-02-19 19:24:47,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:47,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326589350] [2021-02-19 19:24:47,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:47,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326589350] [2021-02-19 19:24:47,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009059309] [2021-02-19 19:24:47,130 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:47,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:47,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:47,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 19:24:47,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:47,193 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 5 treesize of output 3 [2021-02-19 19:24:47,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:47,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:47,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:47,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:7 [2021-02-19 19:24:47,276 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 12 treesize of output 8 [2021-02-19 19:24:47,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:47,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:47,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:47,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:8 [2021-02-19 19:24:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:47,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:47,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-02-19 19:24:47,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392893860] [2021-02-19 19:24:47,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:24:47,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:47,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:24:47,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:24:47,313 INFO L87 Difference]: Start difference. First operand 5331 states and 16272 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:47,755 INFO L93 Difference]: Finished difference Result 8098 states and 24481 transitions. [2021-02-19 19:24:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:24:47,756 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-02-19 19:24:47,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:47,765 INFO L225 Difference]: With dead ends: 8098 [2021-02-19 19:24:47,765 INFO L226 Difference]: Without dead ends: 8098 [2021-02-19 19:24:47,766 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:24:47,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8098 states. [2021-02-19 19:24:47,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8098 to 6990. [2021-02-19 19:24:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6990 states, 6989 states have (on average 3.0479324653026185) internal successors, (21302), 6989 states have internal predecessors, (21302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6990 states to 6990 states and 21302 transitions. [2021-02-19 19:24:47,851 INFO L78 Accepts]: Start accepts. Automaton has 6990 states and 21302 transitions. Word has length 43 [2021-02-19 19:24:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:47,851 INFO L480 AbstractCegarLoop]: Abstraction has 6990 states and 21302 transitions. [2021-02-19 19:24:47,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 6990 states and 21302 transitions. [2021-02-19 19:24:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:24:47,858 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:47,858 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:48,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:48,073 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:48,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:48,073 INFO L82 PathProgramCache]: Analyzing trace with hash -350400840, now seen corresponding path program 3 times [2021-02-19 19:24:48,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:48,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797975407] [2021-02-19 19:24:48,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:48,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797975407] [2021-02-19 19:24:48,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317295879] [2021-02-19 19:24:48,564 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:48,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:24:48,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:48,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:24:48,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:48,777 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 7 [2021-02-19 19:24:48,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:48,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:48,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:48,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-02-19 19:24:49,163 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 11 treesize of output 7 [2021-02-19 19:24:49,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:49,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:49,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:49,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2021-02-19 19:24:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:49,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:49,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-02-19 19:24:49,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963270148] [2021-02-19 19:24:49,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:24:49,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:49,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:24:49,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:24:49,486 INFO L87 Difference]: Start difference. First operand 6990 states and 21302 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:51,912 INFO L93 Difference]: Finished difference Result 9380 states and 28180 transitions. [2021-02-19 19:24:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:24:51,913 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:24:51,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:51,925 INFO L225 Difference]: With dead ends: 9380 [2021-02-19 19:24:51,925 INFO L226 Difference]: Without dead ends: 9353 [2021-02-19 19:24:51,925 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=268, Invalid=3638, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:24:51,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9353 states. [2021-02-19 19:24:52,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9353 to 7167. [2021-02-19 19:24:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 7166 states have (on average 3.0375383756628525) internal successors, (21767), 7166 states have internal predecessors, (21767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 21767 transitions. [2021-02-19 19:24:52,016 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 21767 transitions. Word has length 48 [2021-02-19 19:24:52,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:52,016 INFO L480 AbstractCegarLoop]: Abstraction has 7167 states and 21767 transitions. [2021-02-19 19:24:52,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 21767 transitions. [2021-02-19 19:24:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:24:52,023 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:52,023 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:52,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:52,223 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:52,224 INFO L82 PathProgramCache]: Analyzing trace with hash -453168302, now seen corresponding path program 4 times [2021-02-19 19:24:52,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:52,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580815194] [2021-02-19 19:24:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:52,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580815194] [2021-02-19 19:24:52,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629730964] [2021-02-19 19:24:52,701 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:52,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:52,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:52,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:24:52,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:52,880 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 11 treesize of output 7 [2021-02-19 19:24:52,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:52,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:52,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:52,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:24:53,203 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 7 [2021-02-19 19:24:53,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:53,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:53,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:53,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-02-19 19:24:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:53,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:53,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-02-19 19:24:53,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446617176] [2021-02-19 19:24:53,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:24:53,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:53,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:24:53,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:24:53,599 INFO L87 Difference]: Start difference. First operand 7167 states and 21767 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:55,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:55,943 INFO L93 Difference]: Finished difference Result 9430 states and 28308 transitions. [2021-02-19 19:24:55,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:24:55,944 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:24:55,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:55,956 INFO L225 Difference]: With dead ends: 9430 [2021-02-19 19:24:55,956 INFO L226 Difference]: Without dead ends: 9403 [2021-02-19 19:24:55,957 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=247, Invalid=3535, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:24:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9403 states. [2021-02-19 19:24:56,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9403 to 7191. [2021-02-19 19:24:56,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7191 states, 7190 states have (on average 3.036578581363004) internal successors, (21833), 7190 states have internal predecessors, (21833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7191 states to 7191 states and 21833 transitions. [2021-02-19 19:24:56,060 INFO L78 Accepts]: Start accepts. Automaton has 7191 states and 21833 transitions. Word has length 48 [2021-02-19 19:24:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:56,060 INFO L480 AbstractCegarLoop]: Abstraction has 7191 states and 21833 transitions. [2021-02-19 19:24:56,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 7191 states and 21833 transitions. [2021-02-19 19:24:56,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:24:56,067 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:56,067 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:56,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:56,267 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:56,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:56,267 INFO L82 PathProgramCache]: Analyzing trace with hash -345717934, now seen corresponding path program 5 times [2021-02-19 19:24:56,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:56,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228245090] [2021-02-19 19:24:56,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:56,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228245090] [2021-02-19 19:24:56,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256077604] [2021-02-19 19:24:56,721 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:56,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:24:56,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:56,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:24:56,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:56,884 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 11 treesize of output 7 [2021-02-19 19:24:56,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:56,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:56,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:56,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:24:57,209 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 7 [2021-02-19 19:24:57,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:57,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:57,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:24:57,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:33 [2021-02-19 19:24:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:57,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:57,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-02-19 19:24:57,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456325951] [2021-02-19 19:24:57,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:24:57,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:57,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:24:57,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:24:57,636 INFO L87 Difference]: Start difference. First operand 7191 states and 21833 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:00,235 INFO L93 Difference]: Finished difference Result 7393 states and 22320 transitions. [2021-02-19 19:25:00,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:25:00,235 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:25:00,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:00,244 INFO L225 Difference]: With dead ends: 7393 [2021-02-19 19:25:00,244 INFO L226 Difference]: Without dead ends: 7366 [2021-02-19 19:25:00,244 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=293, Invalid=3867, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 19:25:00,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7366 states. [2021-02-19 19:25:00,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7366 to 7203. [2021-02-19 19:25:00,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7203 states, 7202 states have (on average 3.0366564843099138) internal successors, (21870), 7202 states have internal predecessors, (21870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:00,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7203 states to 7203 states and 21870 transitions. [2021-02-19 19:25:00,352 INFO L78 Accepts]: Start accepts. Automaton has 7203 states and 21870 transitions. Word has length 48 [2021-02-19 19:25:00,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:00,352 INFO L480 AbstractCegarLoop]: Abstraction has 7203 states and 21870 transitions. [2021-02-19 19:25:00,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:00,352 INFO L276 IsEmpty]: Start isEmpty. Operand 7203 states and 21870 transitions. [2021-02-19 19:25:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:25:00,358 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:00,358 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:00,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-02-19 19:25:00,562 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:00,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:00,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1221900398, now seen corresponding path program 6 times [2021-02-19 19:25:00,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:00,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199685477] [2021-02-19 19:25:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:01,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199685477] [2021-02-19 19:25:01,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573130359] [2021-02-19 19:25:01,045 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:01,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:25:01,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:01,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:25:01,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:01,211 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 7 [2021-02-19 19:25:01,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:01,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:01,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:01,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-02-19 19:25:01,559 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 11 treesize of output 7 [2021-02-19 19:25:01,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:01,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:01,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:01,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2021-02-19 19:25:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:01,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:01,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-02-19 19:25:01,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200877904] [2021-02-19 19:25:01,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:25:01,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:01,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:25:01,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:25:01,987 INFO L87 Difference]: Start difference. First operand 7203 states and 21870 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:04,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:04,374 INFO L93 Difference]: Finished difference Result 9354 states and 28124 transitions. [2021-02-19 19:25:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:25:04,375 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:25:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:04,387 INFO L225 Difference]: With dead ends: 9354 [2021-02-19 19:25:04,387 INFO L226 Difference]: Without dead ends: 9319 [2021-02-19 19:25:04,387 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=263, Invalid=3519, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:25:04,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9319 states. [2021-02-19 19:25:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9319 to 7199. [2021-02-19 19:25:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7199 states, 7198 states have (on average 3.0362600722422894) internal successors, (21855), 7198 states have internal predecessors, (21855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:04,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7199 states to 7199 states and 21855 transitions. [2021-02-19 19:25:04,481 INFO L78 Accepts]: Start accepts. Automaton has 7199 states and 21855 transitions. Word has length 48 [2021-02-19 19:25:04,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:04,482 INFO L480 AbstractCegarLoop]: Abstraction has 7199 states and 21855 transitions. [2021-02-19 19:25:04,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:04,482 INFO L276 IsEmpty]: Start isEmpty. Operand 7199 states and 21855 transitions. [2021-02-19 19:25:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:25:04,488 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:04,488 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:04,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:04,689 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:04,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:04,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1080185258, now seen corresponding path program 7 times [2021-02-19 19:25:04,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:04,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418229105] [2021-02-19 19:25:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:05,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418229105] [2021-02-19 19:25:05,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891005568] [2021-02-19 19:25:05,153 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:05,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:25:05,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:05,321 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 11 treesize of output 7 [2021-02-19 19:25:05,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:05,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:05,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:05,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:25:05,704 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 7 [2021-02-19 19:25:05,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:05,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:05,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:05,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-02-19 19:25:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:06,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:06,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-02-19 19:25:06,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016689830] [2021-02-19 19:25:06,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:25:06,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:06,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:25:06,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:25:06,117 INFO L87 Difference]: Start difference. First operand 7199 states and 21855 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:08,410 INFO L93 Difference]: Finished difference Result 9420 states and 28290 transitions. [2021-02-19 19:25:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:25:08,411 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:25:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:08,422 INFO L225 Difference]: With dead ends: 9420 [2021-02-19 19:25:08,423 INFO L226 Difference]: Without dead ends: 9393 [2021-02-19 19:25:08,423 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=254, Invalid=3652, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:25:08,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9393 states. [2021-02-19 19:25:08,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9393 to 7195. [2021-02-19 19:25:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7195 states, 7194 states have (on average 3.0364192382541004) internal successors, (21844), 7194 states have internal predecessors, (21844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:08,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7195 states to 7195 states and 21844 transitions. [2021-02-19 19:25:08,516 INFO L78 Accepts]: Start accepts. Automaton has 7195 states and 21844 transitions. Word has length 48 [2021-02-19 19:25:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:08,517 INFO L480 AbstractCegarLoop]: Abstraction has 7195 states and 21844 transitions. [2021-02-19 19:25:08,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:08,517 INFO L276 IsEmpty]: Start isEmpty. Operand 7195 states and 21844 transitions. [2021-02-19 19:25:08,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:25:08,523 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:08,523 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:08,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-02-19 19:25:08,726 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:08,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:08,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1931634578, now seen corresponding path program 8 times [2021-02-19 19:25:08,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:08,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326082382] [2021-02-19 19:25:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:09,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326082382] [2021-02-19 19:25:09,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691450077] [2021-02-19 19:25:09,232 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:09,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:25:09,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:09,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 19:25:09,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:09,402 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 11 treesize of output 7 [2021-02-19 19:25:09,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:09,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:09,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:09,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:25:09,746 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 11 treesize of output 7 [2021-02-19 19:25:09,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:09,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:09,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:09,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2021-02-19 19:25:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:10,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:10,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-02-19 19:25:10,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388766739] [2021-02-19 19:25:10,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:25:10,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:10,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:25:10,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:25:10,137 INFO L87 Difference]: Start difference. First operand 7195 states and 21844 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:12,987 INFO L93 Difference]: Finished difference Result 9434 states and 28319 transitions. [2021-02-19 19:25:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:25:12,988 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:25:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:13,001 INFO L225 Difference]: With dead ends: 9434 [2021-02-19 19:25:13,001 INFO L226 Difference]: Without dead ends: 9407 [2021-02-19 19:25:13,001 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=246, Invalid=3536, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:25:13,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9407 states. [2021-02-19 19:25:13,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9407 to 7179. [2021-02-19 19:25:13,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7179 states, 7178 states have (on average 3.037057676232934) internal successors, (21800), 7178 states have internal predecessors, (21800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7179 states to 7179 states and 21800 transitions. [2021-02-19 19:25:13,123 INFO L78 Accepts]: Start accepts. Automaton has 7179 states and 21800 transitions. Word has length 48 [2021-02-19 19:25:13,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:13,123 INFO L480 AbstractCegarLoop]: Abstraction has 7179 states and 21800 transitions. [2021-02-19 19:25:13,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:13,123 INFO L276 IsEmpty]: Start isEmpty. Operand 7179 states and 21800 transitions. [2021-02-19 19:25:13,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:25:13,131 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:13,131 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:13,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:13,332 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:13,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:13,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1790000520, now seen corresponding path program 9 times [2021-02-19 19:25:13,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:13,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871550844] [2021-02-19 19:25:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:13,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871550844] [2021-02-19 19:25:13,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866365314] [2021-02-19 19:25:13,830 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:13,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:25:13,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:13,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 19:25:13,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:14,005 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 11 treesize of output 7 [2021-02-19 19:25:14,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:14,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:14,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:14,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:25:14,460 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 11 treesize of output 7 [2021-02-19 19:25:14,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:14,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:14,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:14,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2021-02-19 19:25:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:14,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:14,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-02-19 19:25:14,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488858940] [2021-02-19 19:25:14,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-02-19 19:25:14,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:14,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-02-19 19:25:14,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1681, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:25:14,863 INFO L87 Difference]: Start difference. First operand 7179 states and 21800 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:17,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:17,189 INFO L93 Difference]: Finished difference Result 9418 states and 28275 transitions. [2021-02-19 19:25:17,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:25:17,190 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:25:17,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:17,200 INFO L225 Difference]: With dead ends: 9418 [2021-02-19 19:25:17,200 INFO L226 Difference]: Without dead ends: 9391 [2021-02-19 19:25:17,201 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=264, Invalid=3768, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 19:25:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9391 states. [2021-02-19 19:25:17,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9391 to 7179. [2021-02-19 19:25:17,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7179 states, 7178 states have (on average 3.037057676232934) internal successors, (21800), 7178 states have internal predecessors, (21800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7179 states to 7179 states and 21800 transitions. [2021-02-19 19:25:17,293 INFO L78 Accepts]: Start accepts. Automaton has 7179 states and 21800 transitions. Word has length 48 [2021-02-19 19:25:17,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:17,293 INFO L480 AbstractCegarLoop]: Abstraction has 7179 states and 21800 transitions. [2021-02-19 19:25:17,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:17,293 INFO L276 IsEmpty]: Start isEmpty. Operand 7179 states and 21800 transitions. [2021-02-19 19:25:17,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:25:17,299 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:17,300 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:17,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:17,500 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:17,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:17,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1399394932, now seen corresponding path program 10 times [2021-02-19 19:25:17,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:17,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977784596] [2021-02-19 19:25:17,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:17,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977784596] [2021-02-19 19:25:17,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224504207] [2021-02-19 19:25:17,982 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:18,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:25:18,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:18,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:25:18,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:18,155 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 11 treesize of output 7 [2021-02-19 19:25:18,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:18,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:18,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:18,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:25:18,503 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 7 [2021-02-19 19:25:18,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:18,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:18,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:18,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-02-19 19:25:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:18,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:18,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-02-19 19:25:18,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360353437] [2021-02-19 19:25:18,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:25:18,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:18,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:25:18,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:25:18,953 INFO L87 Difference]: Start difference. First operand 7179 states and 21800 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:21,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:21,037 INFO L93 Difference]: Finished difference Result 9431 states and 28306 transitions. [2021-02-19 19:25:21,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:25:21,038 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:25:21,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:21,051 INFO L225 Difference]: With dead ends: 9431 [2021-02-19 19:25:21,052 INFO L226 Difference]: Without dead ends: 9404 [2021-02-19 19:25:21,052 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=247, Invalid=3535, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:25:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9404 states. [2021-02-19 19:25:21,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9404 to 7179. [2021-02-19 19:25:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7179 states, 7178 states have (on average 3.037057676232934) internal successors, (21800), 7178 states have internal predecessors, (21800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:21,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7179 states to 7179 states and 21800 transitions. [2021-02-19 19:25:21,175 INFO L78 Accepts]: Start accepts. Automaton has 7179 states and 21800 transitions. Word has length 48 [2021-02-19 19:25:21,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:21,175 INFO L480 AbstractCegarLoop]: Abstraction has 7179 states and 21800 transitions. [2021-02-19 19:25:21,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:21,175 INFO L276 IsEmpty]: Start isEmpty. Operand 7179 states and 21800 transitions. [2021-02-19 19:25:21,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:25:21,181 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:21,182 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:21,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-02-19 19:25:21,382 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:21,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:21,382 INFO L82 PathProgramCache]: Analyzing trace with hash -509744520, now seen corresponding path program 11 times [2021-02-19 19:25:21,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:21,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23373725] [2021-02-19 19:25:21,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:21,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23373725] [2021-02-19 19:25:21,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583667683] [2021-02-19 19:25:21,891 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:21,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:25:21,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:21,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 19:25:21,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:22,079 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 11 treesize of output 7 [2021-02-19 19:25:22,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:22,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:22,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:22,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:25:22,488 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 7 [2021-02-19 19:25:22,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:22,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:22,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:22,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-02-19 19:25:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:22,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:22,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-02-19 19:25:22,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666026075] [2021-02-19 19:25:22,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:25:22,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:22,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:25:22,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:25:22,846 INFO L87 Difference]: Start difference. First operand 7179 states and 21800 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:25,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:25,060 INFO L93 Difference]: Finished difference Result 9563 states and 28636 transitions. [2021-02-19 19:25:25,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:25:25,061 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:25:25,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:25,073 INFO L225 Difference]: With dead ends: 9563 [2021-02-19 19:25:25,073 INFO L226 Difference]: Without dead ends: 9536 [2021-02-19 19:25:25,074 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=247, Invalid=3535, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:25:25,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9536 states. [2021-02-19 19:25:25,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9536 to 7233. [2021-02-19 19:25:25,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7233 states, 7232 states have (on average 3.03429203539823) internal successors, (21944), 7232 states have internal predecessors, (21944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:25,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7233 states to 7233 states and 21944 transitions. [2021-02-19 19:25:25,170 INFO L78 Accepts]: Start accepts. Automaton has 7233 states and 21944 transitions. Word has length 48 [2021-02-19 19:25:25,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:25,170 INFO L480 AbstractCegarLoop]: Abstraction has 7233 states and 21944 transitions. [2021-02-19 19:25:25,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:25,170 INFO L276 IsEmpty]: Start isEmpty. Operand 7233 states and 21944 transitions. [2021-02-19 19:25:25,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:25:25,177 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:25,177 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:25,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-02-19 19:25:25,377 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:25,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:25,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1400568428, now seen corresponding path program 12 times [2021-02-19 19:25:25,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:25,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805428548] [2021-02-19 19:25:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:25,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805428548] [2021-02-19 19:25:25,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128050584] [2021-02-19 19:25:25,879 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:25,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:25:25,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:25,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 19:25:25,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:26,091 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 7 [2021-02-19 19:25:26,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:26,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:26,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:26,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-02-19 19:25:26,505 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 11 treesize of output 7 [2021-02-19 19:25:26,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:26,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:26,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:26,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:37 [2021-02-19 19:25:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:27,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:27,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2021-02-19 19:25:27,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049239495] [2021-02-19 19:25:27,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-02-19 19:25:27,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:27,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-02-19 19:25:27,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1763, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:25:27,046 INFO L87 Difference]: Start difference. First operand 7233 states and 21944 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:30,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:30,196 INFO L93 Difference]: Finished difference Result 9802 states and 29237 transitions. [2021-02-19 19:25:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 19:25:30,197 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:25:30,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:30,209 INFO L225 Difference]: With dead ends: 9802 [2021-02-19 19:25:30,209 INFO L226 Difference]: Without dead ends: 9671 [2021-02-19 19:25:30,210 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=333, Invalid=4923, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 19:25:30,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9671 states. [2021-02-19 19:25:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9671 to 7365. [2021-02-19 19:25:30,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7365 states, 7364 states have (on average 3.024443237370994) internal successors, (22272), 7364 states have internal predecessors, (22272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7365 states to 7365 states and 22272 transitions. [2021-02-19 19:25:30,308 INFO L78 Accepts]: Start accepts. Automaton has 7365 states and 22272 transitions. Word has length 48 [2021-02-19 19:25:30,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:30,308 INFO L480 AbstractCegarLoop]: Abstraction has 7365 states and 22272 transitions. [2021-02-19 19:25:30,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:30,308 INFO L276 IsEmpty]: Start isEmpty. Operand 7365 states and 22272 transitions. [2021-02-19 19:25:30,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:25:30,315 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:30,315 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:30,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:30,515 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:30,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:30,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1945904740, now seen corresponding path program 13 times [2021-02-19 19:25:30,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:30,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228750811] [2021-02-19 19:25:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:31,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228750811] [2021-02-19 19:25:31,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037735749] [2021-02-19 19:25:31,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:31,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:25:31,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:31,242 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 11 treesize of output 7 [2021-02-19 19:25:31,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:31,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:31,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:31,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:25:31,611 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 7 [2021-02-19 19:25:31,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:31,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:31,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:31,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:37 [2021-02-19 19:25:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:32,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:32,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-02-19 19:25:32,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775491481] [2021-02-19 19:25:32,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:25:32,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:32,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:25:32,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:25:32,068 INFO L87 Difference]: Start difference. First operand 7365 states and 22272 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:35,402 INFO L93 Difference]: Finished difference Result 7642 states and 22946 transitions. [2021-02-19 19:25:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:25:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:25:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:35,413 INFO L225 Difference]: With dead ends: 7642 [2021-02-19 19:25:35,413 INFO L226 Difference]: Without dead ends: 7602 [2021-02-19 19:25:35,413 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=293, Invalid=3867, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 19:25:35,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2021-02-19 19:25:35,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7401. [2021-02-19 19:25:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7401 states, 7400 states have (on average 3.023108108108108) internal successors, (22371), 7400 states have internal predecessors, (22371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7401 states to 7401 states and 22371 transitions. [2021-02-19 19:25:35,492 INFO L78 Accepts]: Start accepts. Automaton has 7401 states and 22371 transitions. Word has length 48 [2021-02-19 19:25:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:35,492 INFO L480 AbstractCegarLoop]: Abstraction has 7401 states and 22371 transitions. [2021-02-19 19:25:35,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 7401 states and 22371 transitions. [2021-02-19 19:25:35,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:25:35,499 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:35,499 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:35,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-02-19 19:25:35,700 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:35,700 INFO L82 PathProgramCache]: Analyzing trace with hash 2120303712, now seen corresponding path program 14 times [2021-02-19 19:25:35,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:35,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199918533] [2021-02-19 19:25:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:36,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199918533] [2021-02-19 19:25:36,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530044494] [2021-02-19 19:25:36,257 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:36,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:25:36,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:36,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:25:36,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:36,446 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 11 treesize of output 7 [2021-02-19 19:25:36,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:36,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:36,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:36,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:25:36,859 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 7 [2021-02-19 19:25:36,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:36,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:36,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:36,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:37 [2021-02-19 19:25:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:37,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:37,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-02-19 19:25:37,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154045516] [2021-02-19 19:25:37,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:25:37,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:37,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:25:37,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:25:37,314 INFO L87 Difference]: Start difference. First operand 7401 states and 22371 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:39,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:39,928 INFO L93 Difference]: Finished difference Result 9625 states and 28798 transitions. [2021-02-19 19:25:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:25:39,929 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:25:39,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:39,940 INFO L225 Difference]: With dead ends: 9625 [2021-02-19 19:25:39,941 INFO L226 Difference]: Without dead ends: 9580 [2021-02-19 19:25:39,941 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=242, Invalid=3418, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 19:25:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9580 states. [2021-02-19 19:25:40,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9580 to 7389. [2021-02-19 19:25:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7389 states, 7388 states have (on average 3.0224688684353005) internal successors, (22330), 7388 states have internal predecessors, (22330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7389 states to 7389 states and 22330 transitions. [2021-02-19 19:25:40,034 INFO L78 Accepts]: Start accepts. Automaton has 7389 states and 22330 transitions. Word has length 48 [2021-02-19 19:25:40,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:40,034 INFO L480 AbstractCegarLoop]: Abstraction has 7389 states and 22330 transitions. [2021-02-19 19:25:40,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 7389 states and 22330 transitions. [2021-02-19 19:25:40,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:25:40,041 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:40,041 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:40,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-02-19 19:25:40,241 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:40,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:40,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1173571912, now seen corresponding path program 15 times [2021-02-19 19:25:40,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:40,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108133429] [2021-02-19 19:25:40,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:40,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108133429] [2021-02-19 19:25:40,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126746167] [2021-02-19 19:25:40,779 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:40,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:25:40,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:40,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-02-19 19:25:40,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:40,970 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 11 treesize of output 7 [2021-02-19 19:25:40,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:40,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:40,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:40,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:25:41,526 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 11 treesize of output 7 [2021-02-19 19:25:41,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:41,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:41,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:41,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:37 [2021-02-19 19:25:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:42,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:42,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2021-02-19 19:25:42,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397314775] [2021-02-19 19:25:42,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-02-19 19:25:42,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:42,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-02-19 19:25:42,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1763, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:25:42,028 INFO L87 Difference]: Start difference. First operand 7389 states and 22330 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:45,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:45,037 INFO L93 Difference]: Finished difference Result 9709 states and 29004 transitions. [2021-02-19 19:25:45,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 19:25:45,038 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:25:45,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:45,050 INFO L225 Difference]: With dead ends: 9709 [2021-02-19 19:25:45,050 INFO L226 Difference]: Without dead ends: 9650 [2021-02-19 19:25:45,051 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=300, Invalid=4392, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 19:25:45,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9650 states. [2021-02-19 19:25:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9650 to 7377. [2021-02-19 19:25:45,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7377 states, 7376 states have (on average 3.0230477223427332) internal successors, (22298), 7376 states have internal predecessors, (22298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7377 states to 7377 states and 22298 transitions. [2021-02-19 19:25:45,149 INFO L78 Accepts]: Start accepts. Automaton has 7377 states and 22298 transitions. Word has length 48 [2021-02-19 19:25:45,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:45,149 INFO L480 AbstractCegarLoop]: Abstraction has 7377 states and 22298 transitions. [2021-02-19 19:25:45,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:45,150 INFO L276 IsEmpty]: Start isEmpty. Operand 7377 states and 22298 transitions. [2021-02-19 19:25:45,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:25:45,156 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:45,156 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:45,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-02-19 19:25:45,357 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:45,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1019134394, now seen corresponding path program 16 times [2021-02-19 19:25:45,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:45,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159143239] [2021-02-19 19:25:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:45,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159143239] [2021-02-19 19:25:45,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698963087] [2021-02-19 19:25:45,973 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:45,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:25:45,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:45,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:25:45,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:46,207 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 11 treesize of output 7 [2021-02-19 19:25:46,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:46,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:46,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:46,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:25:46,607 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 7 [2021-02-19 19:25:46,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:46,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:46,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:46,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:37 [2021-02-19 19:25:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:47,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:47,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-02-19 19:25:47,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948916912] [2021-02-19 19:25:47,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:25:47,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:47,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:25:47,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:25:47,054 INFO L87 Difference]: Start difference. First operand 7377 states and 22298 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:49,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:49,851 INFO L93 Difference]: Finished difference Result 9720 states and 29021 transitions. [2021-02-19 19:25:49,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:25:49,852 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:25:49,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:49,862 INFO L225 Difference]: With dead ends: 9720 [2021-02-19 19:25:49,862 INFO L226 Difference]: Without dead ends: 9588 [2021-02-19 19:25:49,862 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=246, Invalid=3536, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:25:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9588 states. [2021-02-19 19:25:49,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9588 to 7287. [2021-02-19 19:25:49,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7287 states, 7286 states have (on average 3.0290968981608564) internal successors, (22070), 7286 states have internal predecessors, (22070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:49,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7287 states to 7287 states and 22070 transitions. [2021-02-19 19:25:49,956 INFO L78 Accepts]: Start accepts. Automaton has 7287 states and 22070 transitions. Word has length 48 [2021-02-19 19:25:49,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:49,956 INFO L480 AbstractCegarLoop]: Abstraction has 7287 states and 22070 transitions. [2021-02-19 19:25:49,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7287 states and 22070 transitions. [2021-02-19 19:25:49,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:25:49,963 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:49,963 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:50,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:50,164 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:50,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:50,164 INFO L82 PathProgramCache]: Analyzing trace with hash 511866126, now seen corresponding path program 17 times [2021-02-19 19:25:50,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:50,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196049769] [2021-02-19 19:25:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:50,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196049769] [2021-02-19 19:25:50,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219770481] [2021-02-19 19:25:50,702 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:50,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:25:50,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:50,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:25:50,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:50,894 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 11 treesize of output 7 [2021-02-19 19:25:50,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:50,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:50,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:50,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:25:51,368 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 11 treesize of output 7 [2021-02-19 19:25:51,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:51,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:51,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:51,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:37 [2021-02-19 19:25:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:51,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:51,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2021-02-19 19:25:51,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541041377] [2021-02-19 19:25:51,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:25:51,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:51,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:25:51,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:25:51,875 INFO L87 Difference]: Start difference. First operand 7287 states and 22070 transitions. Second operand has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:55,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:55,014 INFO L93 Difference]: Finished difference Result 9686 states and 28929 transitions. [2021-02-19 19:25:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:25:55,015 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:25:55,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:55,026 INFO L225 Difference]: With dead ends: 9686 [2021-02-19 19:25:55,027 INFO L226 Difference]: Without dead ends: 9537 [2021-02-19 19:25:55,027 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=276, Invalid=4014, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 19:25:55,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9537 states. [2021-02-19 19:25:55,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9537 to 7269. [2021-02-19 19:25:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7269 states, 7268 states have (on average 3.029994496422675) internal successors, (22022), 7268 states have internal predecessors, (22022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:55,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7269 states to 7269 states and 22022 transitions. [2021-02-19 19:25:55,119 INFO L78 Accepts]: Start accepts. Automaton has 7269 states and 22022 transitions. Word has length 48 [2021-02-19 19:25:55,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:55,119 INFO L480 AbstractCegarLoop]: Abstraction has 7269 states and 22022 transitions. [2021-02-19 19:25:55,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:55,120 INFO L276 IsEmpty]: Start isEmpty. Operand 7269 states and 22022 transitions. [2021-02-19 19:25:55,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:25:55,126 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:55,126 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:55,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-02-19 19:25:55,327 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:55,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:55,327 INFO L82 PathProgramCache]: Analyzing trace with hash 2135053342, now seen corresponding path program 18 times [2021-02-19 19:25:55,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:55,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174305530] [2021-02-19 19:25:55,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:55,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174305530] [2021-02-19 19:25:55,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804061710] [2021-02-19 19:25:55,941 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:55,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:25:55,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:25:55,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 19:25:55,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:56,143 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 7 [2021-02-19 19:25:56,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:56,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:56,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:56,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-02-19 19:25:56,618 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 11 treesize of output 7 [2021-02-19 19:25:56,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:25:56,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:25:56,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:25:56,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:37 [2021-02-19 19:25:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:57,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:57,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2021-02-19 19:25:57,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049997932] [2021-02-19 19:25:57,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-02-19 19:25:57,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:57,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-02-19 19:25:57,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:25:57,197 INFO L87 Difference]: Start difference. First operand 7269 states and 22022 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:00,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:00,923 INFO L93 Difference]: Finished difference Result 9681 states and 28912 transitions. [2021-02-19 19:26:00,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 19:26:00,925 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:26:00,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:00,938 INFO L225 Difference]: With dead ends: 9681 [2021-02-19 19:26:00,938 INFO L226 Difference]: Without dead ends: 9519 [2021-02-19 19:26:00,938 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=336, Invalid=4920, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 19:26:00,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9519 states. [2021-02-19 19:26:01,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9519 to 7251. [2021-02-19 19:26:01,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7251 states, 7250 states have (on average 3.0317241379310347) internal successors, (21980), 7250 states have internal predecessors, (21980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7251 states to 7251 states and 21980 transitions. [2021-02-19 19:26:01,055 INFO L78 Accepts]: Start accepts. Automaton has 7251 states and 21980 transitions. Word has length 48 [2021-02-19 19:26:01,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:01,055 INFO L480 AbstractCegarLoop]: Abstraction has 7251 states and 21980 transitions. [2021-02-19 19:26:01,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:01,055 INFO L276 IsEmpty]: Start isEmpty. Operand 7251 states and 21980 transitions. [2021-02-19 19:26:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:26:01,063 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:01,063 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:01,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-02-19 19:26:01,264 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:01,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:01,264 INFO L82 PathProgramCache]: Analyzing trace with hash -895478958, now seen corresponding path program 19 times [2021-02-19 19:26:01,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:01,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613890769] [2021-02-19 19:26:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:01,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613890769] [2021-02-19 19:26:01,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514135070] [2021-02-19 19:26:01,816 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:01,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:26:01,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:02,012 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 11 treesize of output 7 [2021-02-19 19:26:02,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:02,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:02,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:02,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:26:02,353 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 7 [2021-02-19 19:26:02,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:02,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:02,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:02,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:26:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:02,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:02,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-02-19 19:26:02,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681047803] [2021-02-19 19:26:02,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:26:02,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:02,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:26:02,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:26:02,779 INFO L87 Difference]: Start difference. First operand 7251 states and 21980 transitions. Second operand has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:05,079 INFO L93 Difference]: Finished difference Result 9806 states and 29264 transitions. [2021-02-19 19:26:05,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:26:05,080 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:26:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:05,094 INFO L225 Difference]: With dead ends: 9806 [2021-02-19 19:26:05,094 INFO L226 Difference]: Without dead ends: 9662 [2021-02-19 19:26:05,095 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=227, Invalid=2853, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 19:26:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9662 states. [2021-02-19 19:26:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9662 to 7342. [2021-02-19 19:26:05,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7342 states, 7341 states have (on average 3.0264269173137173) internal successors, (22217), 7341 states have internal predecessors, (22217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7342 states to 7342 states and 22217 transitions. [2021-02-19 19:26:05,197 INFO L78 Accepts]: Start accepts. Automaton has 7342 states and 22217 transitions. Word has length 48 [2021-02-19 19:26:05,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:05,198 INFO L480 AbstractCegarLoop]: Abstraction has 7342 states and 22217 transitions. [2021-02-19 19:26:05,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:05,198 INFO L276 IsEmpty]: Start isEmpty. Operand 7342 states and 22217 transitions. [2021-02-19 19:26:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:26:05,205 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:05,205 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:05,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:05,405 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:05,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:05,406 INFO L82 PathProgramCache]: Analyzing trace with hash -788028590, now seen corresponding path program 20 times [2021-02-19 19:26:05,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:05,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505438174] [2021-02-19 19:26:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:05,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505438174] [2021-02-19 19:26:05,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690754437] [2021-02-19 19:26:05,985 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:06,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:26:06,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:06,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:26:06,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:06,213 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 11 treesize of output 7 [2021-02-19 19:26:06,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:06,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:06,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:06,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:26:06,569 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 7 [2021-02-19 19:26:06,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:06,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:06,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:06,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:26:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:07,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:07,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:26:07,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655240141] [2021-02-19 19:26:07,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:26:07,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:07,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:26:07,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:26:07,110 INFO L87 Difference]: Start difference. First operand 7342 states and 22217 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:10,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:10,461 INFO L93 Difference]: Finished difference Result 7708 states and 23122 transitions. [2021-02-19 19:26:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:26:10,462 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:26:10,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:10,472 INFO L225 Difference]: With dead ends: 7708 [2021-02-19 19:26:10,472 INFO L226 Difference]: Without dead ends: 7668 [2021-02-19 19:26:10,472 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=288, Invalid=3618, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:26:10,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7668 states. [2021-02-19 19:26:10,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7668 to 7366. [2021-02-19 19:26:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7366 states, 7365 states have (on average 3.0255261371350985) internal successors, (22283), 7365 states have internal predecessors, (22283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7366 states to 7366 states and 22283 transitions. [2021-02-19 19:26:10,552 INFO L78 Accepts]: Start accepts. Automaton has 7366 states and 22283 transitions. Word has length 48 [2021-02-19 19:26:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:10,552 INFO L480 AbstractCegarLoop]: Abstraction has 7366 states and 22283 transitions. [2021-02-19 19:26:10,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 7366 states and 22283 transitions. [2021-02-19 19:26:10,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:26:10,559 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:10,559 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:10,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:10,761 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:10,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:10,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1664211054, now seen corresponding path program 21 times [2021-02-19 19:26:10,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:10,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765722067] [2021-02-19 19:26:10,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:11,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765722067] [2021-02-19 19:26:11,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620370383] [2021-02-19 19:26:11,362 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:11,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:26:11,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:11,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 19:26:11,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:11,570 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 11 treesize of output 7 [2021-02-19 19:26:11,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:11,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:11,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:11,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:26:12,057 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 11 treesize of output 7 [2021-02-19 19:26:12,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:12,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:12,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:12,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-02-19 19:26:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:12,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:12,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-02-19 19:26:12,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207582130] [2021-02-19 19:26:12,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:26:12,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:12,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:26:12,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1520, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:26:12,562 INFO L87 Difference]: Start difference. First operand 7366 states and 22283 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:15,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:15,870 INFO L93 Difference]: Finished difference Result 9642 states and 28853 transitions. [2021-02-19 19:26:15,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:26:15,871 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:26:15,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:15,884 INFO L225 Difference]: With dead ends: 9642 [2021-02-19 19:26:15,884 INFO L226 Difference]: Without dead ends: 9603 [2021-02-19 19:26:15,884 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=254, Invalid=3406, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 19:26:15,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9603 states. [2021-02-19 19:26:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9603 to 7358. [2021-02-19 19:26:15,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7358 states, 7357 states have (on average 3.02528204431154) internal successors, (22257), 7357 states have internal predecessors, (22257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7358 states to 7358 states and 22257 transitions. [2021-02-19 19:26:15,983 INFO L78 Accepts]: Start accepts. Automaton has 7358 states and 22257 transitions. Word has length 48 [2021-02-19 19:26:15,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:15,983 INFO L480 AbstractCegarLoop]: Abstraction has 7358 states and 22257 transitions. [2021-02-19 19:26:15,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 7358 states and 22257 transitions. [2021-02-19 19:26:15,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:26:15,991 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:15,991 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:16,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:16,191 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:16,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:16,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1522495914, now seen corresponding path program 22 times [2021-02-19 19:26:16,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:16,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887762723] [2021-02-19 19:26:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:16,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887762723] [2021-02-19 19:26:16,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618377392] [2021-02-19 19:26:16,800 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:16,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:26:16,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:26:16,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:17,039 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 11 treesize of output 7 [2021-02-19 19:26:17,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:17,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:17,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:17,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:26:17,423 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 7 [2021-02-19 19:26:17,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:17,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:17,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:17,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:26:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:17,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:17,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:26:17,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548847264] [2021-02-19 19:26:17,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:26:17,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:17,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:26:17,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:26:17,925 INFO L87 Difference]: Start difference. First operand 7358 states and 22257 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:21,666 INFO L93 Difference]: Finished difference Result 9839 states and 29331 transitions. [2021-02-19 19:26:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:26:21,667 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:26:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:21,680 INFO L225 Difference]: With dead ends: 9839 [2021-02-19 19:26:21,681 INFO L226 Difference]: Without dead ends: 9782 [2021-02-19 19:26:21,681 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=244, Invalid=3296, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 19:26:21,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9782 states. [2021-02-19 19:26:21,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9782 to 7370. [2021-02-19 19:26:21,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7370 states, 7369 states have (on average 3.0244266521916137) internal successors, (22287), 7369 states have internal predecessors, (22287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:21,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7370 states to 7370 states and 22287 transitions. [2021-02-19 19:26:21,787 INFO L78 Accepts]: Start accepts. Automaton has 7370 states and 22287 transitions. Word has length 48 [2021-02-19 19:26:21,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:21,788 INFO L480 AbstractCegarLoop]: Abstraction has 7370 states and 22287 transitions. [2021-02-19 19:26:21,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:21,788 INFO L276 IsEmpty]: Start isEmpty. Operand 7370 states and 22287 transitions. [2021-02-19 19:26:21,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:26:21,795 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:21,795 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:21,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:21,995 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:21,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:21,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1489323922, now seen corresponding path program 23 times [2021-02-19 19:26:21,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:21,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578093871] [2021-02-19 19:26:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:22,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578093871] [2021-02-19 19:26:22,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128348705] [2021-02-19 19:26:22,609 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:22,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:26:22,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:22,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:26:22,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:22,818 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 11 treesize of output 7 [2021-02-19 19:26:22,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:22,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:22,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:22,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:26:23,263 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 11 treesize of output 7 [2021-02-19 19:26:23,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:23,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:23,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:23,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-02-19 19:26:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:23,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:23,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-02-19 19:26:23,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899549237] [2021-02-19 19:26:23,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-02-19 19:26:23,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:23,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-02-19 19:26:23,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1444, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 19:26:23,774 INFO L87 Difference]: Start difference. First operand 7370 states and 22287 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:27,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:27,170 INFO L93 Difference]: Finished difference Result 9795 states and 29217 transitions. [2021-02-19 19:26:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:26:27,171 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:26:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:27,184 INFO L225 Difference]: With dead ends: 9795 [2021-02-19 19:26:27,184 INFO L226 Difference]: Without dead ends: 9701 [2021-02-19 19:26:27,185 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=264, Invalid=3518, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:26:27,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9701 states. [2021-02-19 19:26:27,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9701 to 7330. [2021-02-19 19:26:27,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7330 states, 7329 states have (on average 3.02756174102879) internal successors, (22189), 7329 states have internal predecessors, (22189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7330 states to 7330 states and 22189 transitions. [2021-02-19 19:26:27,285 INFO L78 Accepts]: Start accepts. Automaton has 7330 states and 22189 transitions. Word has length 48 [2021-02-19 19:26:27,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:27,285 INFO L480 AbstractCegarLoop]: Abstraction has 7330 states and 22189 transitions. [2021-02-19 19:26:27,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:27,285 INFO L276 IsEmpty]: Start isEmpty. Operand 7330 states and 22189 transitions. [2021-02-19 19:26:27,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:26:27,292 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:27,293 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:27,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-02-19 19:26:27,494 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:27,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:27,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1143036564, now seen corresponding path program 24 times [2021-02-19 19:26:27,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:27,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754938181] [2021-02-19 19:26:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:28,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754938181] [2021-02-19 19:26:28,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636627655] [2021-02-19 19:26:28,104 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:28,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:26:28,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:28,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 19:26:28,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:28,346 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 7 [2021-02-19 19:26:28,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:28,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:28,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:28,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-02-19 19:26:28,732 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 7 [2021-02-19 19:26:28,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:28,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:28,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:28,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:29 [2021-02-19 19:26:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:29,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:29,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-02-19 19:26:29,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828304149] [2021-02-19 19:26:29,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:26:29,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:29,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:26:29,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:26:29,190 INFO L87 Difference]: Start difference. First operand 7330 states and 22189 transitions. Second operand has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:33,168 INFO L93 Difference]: Finished difference Result 9894 states and 29460 transitions. [2021-02-19 19:26:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:26:33,169 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:26:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:33,181 INFO L225 Difference]: With dead ends: 9894 [2021-02-19 19:26:33,181 INFO L226 Difference]: Without dead ends: 9750 [2021-02-19 19:26:33,182 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=248, Invalid=2944, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 19:26:33,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9750 states. [2021-02-19 19:26:33,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9750 to 7414. [2021-02-19 19:26:33,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7414 states, 7413 states have (on average 3.020234722784298) internal successors, (22389), 7413 states have internal predecessors, (22389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:33,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7414 states to 7414 states and 22389 transitions. [2021-02-19 19:26:33,276 INFO L78 Accepts]: Start accepts. Automaton has 7414 states and 22389 transitions. Word has length 48 [2021-02-19 19:26:33,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:33,276 INFO L480 AbstractCegarLoop]: Abstraction has 7414 states and 22389 transitions. [2021-02-19 19:26:33,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:33,277 INFO L276 IsEmpty]: Start isEmpty. Operand 7414 states and 22389 transitions. [2021-02-19 19:26:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:26:33,284 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:33,284 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:33,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-02-19 19:26:33,484 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:33,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1116967688, now seen corresponding path program 25 times [2021-02-19 19:26:33,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:33,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113196361] [2021-02-19 19:26:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:34,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113196361] [2021-02-19 19:26:34,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715929789] [2021-02-19 19:26:34,158 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:34,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:26:34,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:34,403 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 11 treesize of output 7 [2021-02-19 19:26:34,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:34,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:34,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:34,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:26:34,833 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 7 [2021-02-19 19:26:34,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:34,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:34,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:34,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:26:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:35,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:35,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:26:35,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564472914] [2021-02-19 19:26:35,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:26:35,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:35,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:26:35,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:26:35,414 INFO L87 Difference]: Start difference. First operand 7414 states and 22389 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:39,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:39,370 INFO L93 Difference]: Finished difference Result 7817 states and 23386 transitions. [2021-02-19 19:26:39,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:26:39,371 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:26:39,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:39,381 INFO L225 Difference]: With dead ends: 7817 [2021-02-19 19:26:39,382 INFO L226 Difference]: Without dead ends: 7777 [2021-02-19 19:26:39,382 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=288, Invalid=3618, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:26:39,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7777 states. [2021-02-19 19:26:39,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7777 to 7450. [2021-02-19 19:26:39,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7450 states, 7449 states have (on average 3.018928715263794) internal successors, (22488), 7449 states have internal predecessors, (22488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:39,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7450 states to 7450 states and 22488 transitions. [2021-02-19 19:26:39,462 INFO L78 Accepts]: Start accepts. Automaton has 7450 states and 22488 transitions. Word has length 48 [2021-02-19 19:26:39,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:39,462 INFO L480 AbstractCegarLoop]: Abstraction has 7450 states and 22488 transitions. [2021-02-19 19:26:39,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:39,463 INFO L276 IsEmpty]: Start isEmpty. Operand 7450 states and 22488 transitions. [2021-02-19 19:26:39,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:26:39,470 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:39,470 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:39,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-02-19 19:26:39,670 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:39,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:39,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1345726532, now seen corresponding path program 26 times [2021-02-19 19:26:39,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:39,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593739912] [2021-02-19 19:26:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:40,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593739912] [2021-02-19 19:26:40,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351742601] [2021-02-19 19:26:40,362 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:40,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:26:40,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:40,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:26:40,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:40,625 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 11 treesize of output 7 [2021-02-19 19:26:40,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:40,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:40,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:40,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:26:41,130 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 7 [2021-02-19 19:26:41,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:41,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:41,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:41,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:26:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:41,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:41,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:26:41,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518103100] [2021-02-19 19:26:41,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:26:41,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:41,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:26:41,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:26:41,731 INFO L87 Difference]: Start difference. First operand 7450 states and 22488 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:45,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:45,720 INFO L93 Difference]: Finished difference Result 9714 states and 29023 transitions. [2021-02-19 19:26:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:26:45,721 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:26:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:45,732 INFO L225 Difference]: With dead ends: 9714 [2021-02-19 19:26:45,732 INFO L226 Difference]: Without dead ends: 9669 [2021-02-19 19:26:45,732 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=237, Invalid=3185, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 19:26:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9669 states. [2021-02-19 19:26:45,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9669 to 7438. [2021-02-19 19:26:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7438 states, 7437 states have (on average 3.018286943660078) internal successors, (22447), 7437 states have internal predecessors, (22447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:45,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7438 states to 7438 states and 22447 transitions. [2021-02-19 19:26:45,822 INFO L78 Accepts]: Start accepts. Automaton has 7438 states and 22447 transitions. Word has length 48 [2021-02-19 19:26:45,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:45,822 INFO L480 AbstractCegarLoop]: Abstraction has 7438 states and 22447 transitions. [2021-02-19 19:26:45,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand 7438 states and 22447 transitions. [2021-02-19 19:26:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:26:45,829 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:45,829 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:46,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:46,029 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:46,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:46,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2002508964, now seen corresponding path program 27 times [2021-02-19 19:26:46,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:46,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837729505] [2021-02-19 19:26:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:46,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837729505] [2021-02-19 19:26:46,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823416318] [2021-02-19 19:26:46,730 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:46,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:26:46,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:46,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-02-19 19:26:46,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:46,978 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 11 treesize of output 7 [2021-02-19 19:26:46,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:47,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:47,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:47,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:26:47,616 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 11 treesize of output 7 [2021-02-19 19:26:47,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:47,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:47,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:47,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-02-19 19:26:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:48,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:48,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 41 [2021-02-19 19:26:48,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720038281] [2021-02-19 19:26:48,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:26:48,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:48,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:26:48,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:26:48,213 INFO L87 Difference]: Start difference. First operand 7438 states and 22447 transitions. Second operand has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:52,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:52,231 INFO L93 Difference]: Finished difference Result 9959 states and 29613 transitions. [2021-02-19 19:26:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 19:26:52,233 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:26:52,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:52,246 INFO L225 Difference]: With dead ends: 9959 [2021-02-19 19:26:52,247 INFO L226 Difference]: Without dead ends: 9900 [2021-02-19 19:26:52,247 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=290, Invalid=4000, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 19:26:52,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9900 states. [2021-02-19 19:26:52,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9900 to 7450. [2021-02-19 19:26:52,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7450 states, 7449 states have (on average 3.017317760773258) internal successors, (22476), 7449 states have internal predecessors, (22476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7450 states to 7450 states and 22476 transitions. [2021-02-19 19:26:52,349 INFO L78 Accepts]: Start accepts. Automaton has 7450 states and 22476 transitions. Word has length 48 [2021-02-19 19:26:52,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:52,349 INFO L480 AbstractCegarLoop]: Abstraction has 7450 states and 22476 transitions. [2021-02-19 19:26:52,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:52,349 INFO L276 IsEmpty]: Start isEmpty. Operand 7450 states and 22476 transitions. [2021-02-19 19:26:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:26:52,357 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:52,357 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:52,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-02-19 19:26:52,559 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:52,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1848071446, now seen corresponding path program 28 times [2021-02-19 19:26:52,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:52,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890994584] [2021-02-19 19:26:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:53,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890994584] [2021-02-19 19:26:53,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382614544] [2021-02-19 19:26:53,292 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:53,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:26:53,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:53,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:26:53,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:53,564 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 11 treesize of output 7 [2021-02-19 19:26:53,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:53,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:53,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:53,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:26:53,998 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 7 [2021-02-19 19:26:53,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:54,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:54,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:54,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:26:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:54,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:26:54,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:26:54,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781501050] [2021-02-19 19:26:54,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:26:54,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:26:54,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:26:54,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:26:54,600 INFO L87 Difference]: Start difference. First operand 7450 states and 22476 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:58,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:26:58,083 INFO L93 Difference]: Finished difference Result 9891 states and 29436 transitions. [2021-02-19 19:26:58,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:26:58,085 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:26:58,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:26:58,124 INFO L225 Difference]: With dead ends: 9891 [2021-02-19 19:26:58,125 INFO L226 Difference]: Without dead ends: 9735 [2021-02-19 19:26:58,125 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 19:26:58,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9735 states. [2021-02-19 19:26:58,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9735 to 7354. [2021-02-19 19:26:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7354 states, 7353 states have (on average 3.022847817217462) internal successors, (22227), 7353 states have internal predecessors, (22227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7354 states to 7354 states and 22227 transitions. [2021-02-19 19:26:58,214 INFO L78 Accepts]: Start accepts. Automaton has 7354 states and 22227 transitions. Word has length 48 [2021-02-19 19:26:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:26:58,214 INFO L480 AbstractCegarLoop]: Abstraction has 7354 states and 22227 transitions. [2021-02-19 19:26:58,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:26:58,214 INFO L276 IsEmpty]: Start isEmpty. Operand 7354 states and 22227 transitions. [2021-02-19 19:26:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:26:58,221 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:26:58,221 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:26:58,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:58,422 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:26:58,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:26:58,422 INFO L82 PathProgramCache]: Analyzing trace with hash 324684076, now seen corresponding path program 29 times [2021-02-19 19:26:58,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:26:58,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37127041] [2021-02-19 19:26:58,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:26:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:26:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:26:59,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37127041] [2021-02-19 19:26:59,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438327871] [2021-02-19 19:26:59,151 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:26:59,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:26:59,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:26:59,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 19:26:59,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:26:59,404 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 11 treesize of output 7 [2021-02-19 19:26:59,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:59,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:59,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:59,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:26:59,886 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 11 treesize of output 7 [2021-02-19 19:26:59,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:26:59,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:26:59,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:26:59,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-02-19 19:27:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:00,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:00,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-02-19 19:27:00,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521455127] [2021-02-19 19:27:00,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:27:00,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:00,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:27:00,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1518, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:27:00,759 INFO L87 Difference]: Start difference. First operand 7354 states and 22227 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:01,517 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 19:27:05,423 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 19:27:05,692 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 19:27:05,867 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-02-19 19:27:06,169 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-02-19 19:27:06,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:06,452 INFO L93 Difference]: Finished difference Result 7737 states and 23186 transitions. [2021-02-19 19:27:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:27:06,454 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:27:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:06,465 INFO L225 Difference]: With dead ends: 7737 [2021-02-19 19:27:06,465 INFO L226 Difference]: Without dead ends: 7697 [2021-02-19 19:27:06,466 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=352, Invalid=4204, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 19:27:06,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7697 states. [2021-02-19 19:27:06,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7697 to 7370. [2021-02-19 19:27:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7370 states, 7369 states have (on average 3.0227982087121728) internal successors, (22275), 7369 states have internal predecessors, (22275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:06,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7370 states to 7370 states and 22275 transitions. [2021-02-19 19:27:06,561 INFO L78 Accepts]: Start accepts. Automaton has 7370 states and 22275 transitions. Word has length 48 [2021-02-19 19:27:06,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:06,561 INFO L480 AbstractCegarLoop]: Abstraction has 7370 states and 22275 transitions. [2021-02-19 19:27:06,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:06,562 INFO L276 IsEmpty]: Start isEmpty. Operand 7370 states and 22275 transitions. [2021-02-19 19:27:06,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:27:06,569 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:06,569 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:06,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-02-19 19:27:06,770 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:06,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:06,770 INFO L82 PathProgramCache]: Analyzing trace with hash -551498388, now seen corresponding path program 30 times [2021-02-19 19:27:06,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:06,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062293704] [2021-02-19 19:27:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:07,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062293704] [2021-02-19 19:27:07,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411180902] [2021-02-19 19:27:07,547 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:07,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:27:07,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:07,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:27:07,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:07,878 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 7 [2021-02-19 19:27:07,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:07,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:07,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:07,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-02-19 19:27:08,375 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 11 treesize of output 7 [2021-02-19 19:27:08,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:08,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:08,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:08,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-02-19 19:27:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:09,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:09,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:27:09,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887415268] [2021-02-19 19:27:09,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:27:09,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:09,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:27:09,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:27:09,083 INFO L87 Difference]: Start difference. First operand 7370 states and 22275 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:13,727 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 19:27:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:14,499 INFO L93 Difference]: Finished difference Result 7618 states and 22895 transitions. [2021-02-19 19:27:14,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:27:14,500 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:27:14,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:14,510 INFO L225 Difference]: With dead ends: 7618 [2021-02-19 19:27:14,511 INFO L226 Difference]: Without dead ends: 7579 [2021-02-19 19:27:14,511 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=302, Invalid=3604, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:27:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7579 states. [2021-02-19 19:27:14,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7579 to 7362. [2021-02-19 19:27:14,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7362 states, 7361 states have (on average 3.0229588371145226) internal successors, (22252), 7361 states have internal predecessors, (22252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:14,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7362 states to 7362 states and 22252 transitions. [2021-02-19 19:27:14,592 INFO L78 Accepts]: Start accepts. Automaton has 7362 states and 22252 transitions. Word has length 48 [2021-02-19 19:27:14,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:14,592 INFO L480 AbstractCegarLoop]: Abstraction has 7362 states and 22252 transitions. [2021-02-19 19:27:14,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:14,593 INFO L276 IsEmpty]: Start isEmpty. Operand 7362 states and 22252 transitions. [2021-02-19 19:27:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:27:14,600 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:14,600 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:14,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:14,800 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:14,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:14,800 INFO L82 PathProgramCache]: Analyzing trace with hash 692548972, now seen corresponding path program 31 times [2021-02-19 19:27:14,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:14,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997272466] [2021-02-19 19:27:14,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:15,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997272466] [2021-02-19 19:27:15,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144221155] [2021-02-19 19:27:15,625 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:15,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:27:15,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:15,926 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 11 treesize of output 7 [2021-02-19 19:27:15,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:15,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:15,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:15,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:27:16,480 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 7 [2021-02-19 19:27:16,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:16,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:16,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:16,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:27:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:17,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:17,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:27:17,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105448351] [2021-02-19 19:27:17,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:27:17,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:17,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:27:17,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:27:17,257 INFO L87 Difference]: Start difference. First operand 7362 states and 22252 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:17,555 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-02-19 19:27:17,786 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-02-19 19:27:18,113 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-02-19 19:27:22,132 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-02-19 19:27:22,409 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-02-19 19:27:22,596 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-02-19 19:27:23,021 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-02-19 19:27:23,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:23,326 INFO L93 Difference]: Finished difference Result 7703 states and 23099 transitions. [2021-02-19 19:27:23,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:27:23,328 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:27:23,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:23,339 INFO L225 Difference]: With dead ends: 7703 [2021-02-19 19:27:23,339 INFO L226 Difference]: Without dead ends: 7663 [2021-02-19 19:27:23,340 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=307, Invalid=3599, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:27:23,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7663 states. [2021-02-19 19:27:23,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7663 to 7374. [2021-02-19 19:27:23,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7374 states, 7373 states have (on average 3.0227858402278582) internal successors, (22287), 7373 states have internal predecessors, (22287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:23,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7374 states to 7374 states and 22287 transitions. [2021-02-19 19:27:23,461 INFO L78 Accepts]: Start accepts. Automaton has 7374 states and 22287 transitions. Word has length 48 [2021-02-19 19:27:23,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:23,461 INFO L480 AbstractCegarLoop]: Abstraction has 7374 states and 22287 transitions. [2021-02-19 19:27:23,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:23,461 INFO L276 IsEmpty]: Start isEmpty. Operand 7374 states and 22287 transitions. [2021-02-19 19:27:23,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:27:23,469 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:23,469 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:23,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:23,670 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:23,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:23,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1838748394, now seen corresponding path program 32 times [2021-02-19 19:27:23,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:23,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514276253] [2021-02-19 19:27:23,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:24,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514276253] [2021-02-19 19:27:24,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92136792] [2021-02-19 19:27:24,634 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:24,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:27:24,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:24,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:27:24,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:24,931 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 11 treesize of output 7 [2021-02-19 19:27:24,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:24,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:24,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:24,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:27:25,487 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 7 [2021-02-19 19:27:25,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:25,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:25,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:25,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:27:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:26,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:26,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:27:26,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303750346] [2021-02-19 19:27:26,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:27:26,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:26,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:27:26,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:27:26,195 INFO L87 Difference]: Start difference. First operand 7374 states and 22287 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:27,002 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 19:27:31,298 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-02-19 19:27:31,583 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-02-19 19:27:31,743 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-02-19 19:27:32,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:32,128 INFO L93 Difference]: Finished difference Result 7634 states and 22933 transitions. [2021-02-19 19:27:32,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:27:32,130 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:27:32,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:32,139 INFO L225 Difference]: With dead ends: 7634 [2021-02-19 19:27:32,139 INFO L226 Difference]: Without dead ends: 7589 [2021-02-19 19:27:32,140 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=281, Invalid=3501, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:27:32,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7589 states. [2021-02-19 19:27:32,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7589 to 7362. [2021-02-19 19:27:32,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7362 states, 7361 states have (on average 3.0226871349001496) internal successors, (22250), 7361 states have internal predecessors, (22250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7362 states to 7362 states and 22250 transitions. [2021-02-19 19:27:32,224 INFO L78 Accepts]: Start accepts. Automaton has 7362 states and 22250 transitions. Word has length 48 [2021-02-19 19:27:32,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:32,224 INFO L480 AbstractCegarLoop]: Abstraction has 7362 states and 22250 transitions. [2021-02-19 19:27:32,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:32,224 INFO L276 IsEmpty]: Start isEmpty. Operand 7362 states and 22250 transitions. [2021-02-19 19:27:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:27:32,231 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:32,231 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:32,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-02-19 19:27:32,432 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:32,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:32,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1778452052, now seen corresponding path program 33 times [2021-02-19 19:27:32,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:32,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205527735] [2021-02-19 19:27:32,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:33,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205527735] [2021-02-19 19:27:33,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134277951] [2021-02-19 19:27:33,318 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:33,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:27:33,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:33,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-02-19 19:27:33,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:33,630 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 7 [2021-02-19 19:27:33,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:33,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:33,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:33,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-02-19 19:27:34,221 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 11 treesize of output 7 [2021-02-19 19:27:34,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:34,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:34,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:34,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-02-19 19:27:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:35,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:35,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-02-19 19:27:35,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260762871] [2021-02-19 19:27:35,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:27:35,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:35,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:27:35,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1519, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:27:35,191 INFO L87 Difference]: Start difference. First operand 7362 states and 22250 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:40,787 INFO L93 Difference]: Finished difference Result 9572 states and 28659 transitions. [2021-02-19 19:27:40,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:27:40,790 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:27:40,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:40,804 INFO L225 Difference]: With dead ends: 9572 [2021-02-19 19:27:40,804 INFO L226 Difference]: Without dead ends: 9537 [2021-02-19 19:27:40,805 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=286, Invalid=3746, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 19:27:40,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9537 states. [2021-02-19 19:27:40,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9537 to 7366. [2021-02-19 19:27:40,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7366 states, 7365 states have (on average 3.022131704005431) internal successors, (22258), 7365 states have internal predecessors, (22258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7366 states to 7366 states and 22258 transitions. [2021-02-19 19:27:40,923 INFO L78 Accepts]: Start accepts. Automaton has 7366 states and 22258 transitions. Word has length 48 [2021-02-19 19:27:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:40,923 INFO L480 AbstractCegarLoop]: Abstraction has 7366 states and 22258 transitions. [2021-02-19 19:27:40,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:40,923 INFO L276 IsEmpty]: Start isEmpty. Operand 7366 states and 22258 transitions. [2021-02-19 19:27:40,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:27:40,930 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:40,930 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:41,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-02-19 19:27:41,131 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:41,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:41,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1909077484, now seen corresponding path program 34 times [2021-02-19 19:27:41,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:41,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977983222] [2021-02-19 19:27:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:42,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977983222] [2021-02-19 19:27:42,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880437407] [2021-02-19 19:27:42,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:42,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:27:42,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:42,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:27:42,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:42,485 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 11 treesize of output 7 [2021-02-19 19:27:42,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:42,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:42,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:42,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:27:43,214 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 7 [2021-02-19 19:27:43,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:43,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:43,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:43,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:27:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:44,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:44,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:27:44,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029429183] [2021-02-19 19:27:44,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:27:44,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:44,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:27:44,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:27:44,138 INFO L87 Difference]: Start difference. First operand 7366 states and 22258 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:44,998 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-02-19 19:27:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:49,398 INFO L93 Difference]: Finished difference Result 9576 states and 28665 transitions. [2021-02-19 19:27:49,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 19:27:49,401 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:27:49,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:49,414 INFO L225 Difference]: With dead ends: 9576 [2021-02-19 19:27:49,414 INFO L226 Difference]: Without dead ends: 9531 [2021-02-19 19:27:49,414 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=232, Invalid=3074, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 19:27:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9531 states. [2021-02-19 19:27:49,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9531 to 7358. [2021-02-19 19:27:49,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7358 states, 7357 states have (on average 3.0225635449232024) internal successors, (22237), 7357 states have internal predecessors, (22237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7358 states to 7358 states and 22237 transitions. [2021-02-19 19:27:49,511 INFO L78 Accepts]: Start accepts. Automaton has 7358 states and 22237 transitions. Word has length 48 [2021-02-19 19:27:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:49,511 INFO L480 AbstractCegarLoop]: Abstraction has 7358 states and 22237 transitions. [2021-02-19 19:27:49,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:49,511 INFO L276 IsEmpty]: Start isEmpty. Operand 7358 states and 22237 transitions. [2021-02-19 19:27:49,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:27:49,518 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:49,518 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:49,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:49,718 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:49,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:49,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1848727040, now seen corresponding path program 35 times [2021-02-19 19:27:49,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:49,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520752654] [2021-02-19 19:27:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:50,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520752654] [2021-02-19 19:27:50,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134810220] [2021-02-19 19:27:50,737 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:50,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:27:50,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:50,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 19:27:50,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:51,076 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 11 treesize of output 7 [2021-02-19 19:27:51,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:51,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:51,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:51,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:27:51,725 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 11 treesize of output 7 [2021-02-19 19:27:51,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:51,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:51,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:27:51,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-02-19 19:27:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:52,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:52,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-02-19 19:27:52,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991904586] [2021-02-19 19:27:52,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:27:52,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:52,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:27:52,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1519, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:27:52,861 INFO L87 Difference]: Start difference. First operand 7358 states and 22237 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:53,385 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-02-19 19:27:53,744 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-02-19 19:27:55,331 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-02-19 19:27:56,788 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-02-19 19:27:58,011 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-02-19 19:27:58,186 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-02-19 19:27:58,551 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 19:27:58,950 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 19:27:59,367 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 19:27:59,558 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-02-19 19:27:59,964 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 19:28:00,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:00,099 INFO L93 Difference]: Finished difference Result 7789 states and 23306 transitions. [2021-02-19 19:28:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 19:28:00,102 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:28:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:00,113 INFO L225 Difference]: With dead ends: 7789 [2021-02-19 19:28:00,113 INFO L226 Difference]: Without dead ends: 7736 [2021-02-19 19:28:00,114 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=349, Invalid=4481, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 19:28:00,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7736 states. [2021-02-19 19:28:00,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7736 to 7374. [2021-02-19 19:28:00,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7374 states, 7373 states have (on average 3.0214295402142954) internal successors, (22277), 7373 states have internal predecessors, (22277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:00,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7374 states to 7374 states and 22277 transitions. [2021-02-19 19:28:00,197 INFO L78 Accepts]: Start accepts. Automaton has 7374 states and 22277 transitions. Word has length 48 [2021-02-19 19:28:00,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:00,197 INFO L480 AbstractCegarLoop]: Abstraction has 7374 states and 22277 transitions. [2021-02-19 19:28:00,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:00,197 INFO L276 IsEmpty]: Start isEmpty. Operand 7374 states and 22277 transitions. [2021-02-19 19:28:00,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:28:00,205 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:00,205 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:00,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-02-19 19:28:00,410 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:00,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:00,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1570057792, now seen corresponding path program 36 times [2021-02-19 19:28:00,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:00,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223092159] [2021-02-19 19:28:00,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:01,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223092159] [2021-02-19 19:28:01,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600393690] [2021-02-19 19:28:01,519 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:01,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:28:01,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:01,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:28:01,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:01,905 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 7 [2021-02-19 19:28:01,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:01,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:01,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:01,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-02-19 19:28:02,640 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 11 treesize of output 7 [2021-02-19 19:28:02,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:02,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:02,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:02,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-02-19 19:28:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:03,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:03,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:28:03,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609712156] [2021-02-19 19:28:03,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:28:03,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:03,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:28:03,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:28:03,604 INFO L87 Difference]: Start difference. First operand 7374 states and 22277 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:04,125 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 19:28:04,490 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-02-19 19:28:08,726 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 19:28:09,115 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-02-19 19:28:09,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:09,869 INFO L93 Difference]: Finished difference Result 9648 states and 28844 transitions. [2021-02-19 19:28:09,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:28:09,871 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:28:09,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:09,884 INFO L225 Difference]: With dead ends: 9648 [2021-02-19 19:28:09,884 INFO L226 Difference]: Without dead ends: 9605 [2021-02-19 19:28:09,885 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=276, Invalid=3630, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:28:09,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2021-02-19 19:28:09,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 7358. [2021-02-19 19:28:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7358 states, 7357 states have (on average 3.0224276199537856) internal successors, (22236), 7357 states have internal predecessors, (22236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:09,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7358 states to 7358 states and 22236 transitions. [2021-02-19 19:28:09,987 INFO L78 Accepts]: Start accepts. Automaton has 7358 states and 22236 transitions. Word has length 48 [2021-02-19 19:28:09,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:09,987 INFO L480 AbstractCegarLoop]: Abstraction has 7358 states and 22236 transitions. [2021-02-19 19:28:09,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:09,987 INFO L276 IsEmpty]: Start isEmpty. Operand 7358 states and 22236 transitions. [2021-02-19 19:28:09,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:28:09,995 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:09,995 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:10,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:10,195 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:10,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:10,195 INFO L82 PathProgramCache]: Analyzing trace with hash 290143856, now seen corresponding path program 37 times [2021-02-19 19:28:10,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:10,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341707678] [2021-02-19 19:28:10,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:11,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341707678] [2021-02-19 19:28:11,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764601156] [2021-02-19 19:28:11,321 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:11,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:28:11,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:11,706 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 11 treesize of output 7 [2021-02-19 19:28:11,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:11,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:11,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:11,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:28:12,436 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 7 [2021-02-19 19:28:12,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:12,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:12,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:12,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:28:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:13,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:13,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:28:13,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405622414] [2021-02-19 19:28:13,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:28:13,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:13,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:28:13,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:28:13,408 INFO L87 Difference]: Start difference. First operand 7358 states and 22236 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:13,759 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 19:28:14,018 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 19:28:14,453 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 19:28:14,949 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-02-19 19:28:17,932 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 19:28:19,279 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-02-19 19:28:19,626 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 19:28:19,917 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 19:28:20,371 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 19:28:20,569 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 19:28:20,787 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 19:28:21,266 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-02-19 19:28:21,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:21,381 INFO L93 Difference]: Finished difference Result 7771 states and 23261 transitions. [2021-02-19 19:28:21,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:28:21,384 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:28:21,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:21,394 INFO L225 Difference]: With dead ends: 7771 [2021-02-19 19:28:21,394 INFO L226 Difference]: Without dead ends: 7718 [2021-02-19 19:28:21,394 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=323, Invalid=4099, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 19:28:21,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7718 states. [2021-02-19 19:28:21,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7718 to 7382. [2021-02-19 19:28:21,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7382 states, 7381 states have (on average 3.0212708305107707) internal successors, (22300), 7381 states have internal predecessors, (22300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:21,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7382 states to 7382 states and 22300 transitions. [2021-02-19 19:28:21,477 INFO L78 Accepts]: Start accepts. Automaton has 7382 states and 22300 transitions. Word has length 48 [2021-02-19 19:28:21,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:21,477 INFO L480 AbstractCegarLoop]: Abstraction has 7382 states and 22300 transitions. [2021-02-19 19:28:21,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:21,477 INFO L276 IsEmpty]: Start isEmpty. Operand 7382 states and 22300 transitions. [2021-02-19 19:28:21,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:28:21,484 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:21,484 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:21,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-02-19 19:28:21,686 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:21,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:21,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2053813786, now seen corresponding path program 38 times [2021-02-19 19:28:21,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:21,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834765875] [2021-02-19 19:28:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:22,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834765875] [2021-02-19 19:28:22,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373818517] [2021-02-19 19:28:22,865 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:22,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:28:22,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:22,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:28:22,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:23,241 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 11 treesize of output 7 [2021-02-19 19:28:23,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:23,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:23,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:23,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:28:23,975 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 7 [2021-02-19 19:28:23,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:24,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:24,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:24,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:28:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:24,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:24,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:28:24,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454739856] [2021-02-19 19:28:24,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:28:24,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:24,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:28:24,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:28:24,953 INFO L87 Difference]: Start difference. First operand 7382 states and 22300 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:25,289 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 19:28:25,527 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 19:28:25,935 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-02-19 19:28:26,188 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 19:28:29,445 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-02-19 19:28:31,332 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 19:28:31,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:31,586 INFO L93 Difference]: Finished difference Result 9668 states and 28895 transitions. [2021-02-19 19:28:31,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:28:31,589 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:28:31,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:31,604 INFO L225 Difference]: With dead ends: 9668 [2021-02-19 19:28:31,604 INFO L226 Difference]: Without dead ends: 9615 [2021-02-19 19:28:31,604 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=255, Invalid=3527, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:28:31,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9615 states. [2021-02-19 19:28:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9615 to 7354. [2021-02-19 19:28:31,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7354 states, 7353 states have (on average 3.022575819393445) internal successors, (22225), 7353 states have internal predecessors, (22225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:31,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7354 states to 7354 states and 22225 transitions. [2021-02-19 19:28:31,708 INFO L78 Accepts]: Start accepts. Automaton has 7354 states and 22225 transitions. Word has length 48 [2021-02-19 19:28:31,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:31,708 INFO L480 AbstractCegarLoop]: Abstraction has 7354 states and 22225 transitions. [2021-02-19 19:28:31,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 7354 states and 22225 transitions. [2021-02-19 19:28:31,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:28:31,716 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:31,716 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:31,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:31,917 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:31,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:31,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1508115534, now seen corresponding path program 39 times [2021-02-19 19:28:31,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:31,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291447001] [2021-02-19 19:28:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:33,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291447001] [2021-02-19 19:28:33,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112680534] [2021-02-19 19:28:33,142 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:33,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:28:33,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:33,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-02-19 19:28:33,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:33,588 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 7 [2021-02-19 19:28:33,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:33,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:33,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:33,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-02-19 19:28:34,347 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 11 treesize of output 7 [2021-02-19 19:28:34,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:34,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:34,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:34,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-02-19 19:28:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:35,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:35,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-02-19 19:28:35,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144873290] [2021-02-19 19:28:35,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:28:35,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:35,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:28:35,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1519, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:28:35,675 INFO L87 Difference]: Start difference. First operand 7354 states and 22225 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:36,128 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-02-19 19:28:36,400 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-02-19 19:28:36,896 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-02-19 19:28:37,208 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-02-19 19:28:37,520 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 19:28:38,267 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-02-19 19:28:39,434 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-02-19 19:28:41,471 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-02-19 19:28:43,198 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-02-19 19:28:43,686 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-02-19 19:28:44,029 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-02-19 19:28:44,311 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 19:28:44,789 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 19:28:45,260 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 19:28:45,465 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-02-19 19:28:45,863 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 19:28:46,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:46,042 INFO L93 Difference]: Finished difference Result 7719 states and 23132 transitions. [2021-02-19 19:28:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:28:46,044 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:28:46,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:46,053 INFO L225 Difference]: With dead ends: 7719 [2021-02-19 19:28:46,053 INFO L226 Difference]: Without dead ends: 7679 [2021-02-19 19:28:46,054 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=377, Invalid=4735, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 19:28:46,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7679 states. [2021-02-19 19:28:46,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7679 to 7362. [2021-02-19 19:28:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7362 states, 7361 states have (on average 3.02227958157859) internal successors, (22247), 7361 states have internal predecessors, (22247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7362 states to 7362 states and 22247 transitions. [2021-02-19 19:28:46,136 INFO L78 Accepts]: Start accepts. Automaton has 7362 states and 22247 transitions. Word has length 48 [2021-02-19 19:28:46,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:46,136 INFO L480 AbstractCegarLoop]: Abstraction has 7362 states and 22247 transitions. [2021-02-19 19:28:46,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:46,136 INFO L276 IsEmpty]: Start isEmpty. Operand 7362 states and 22247 transitions. [2021-02-19 19:28:46,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:28:46,143 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:46,143 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:46,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-02-19 19:28:46,346 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:46,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:46,346 INFO L82 PathProgramCache]: Analyzing trace with hash 631933070, now seen corresponding path program 40 times [2021-02-19 19:28:46,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:46,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763559920] [2021-02-19 19:28:46,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:47,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763559920] [2021-02-19 19:28:47,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595746094] [2021-02-19 19:28:47,450 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:47,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:28:47,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:47,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:28:47,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:47,811 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 11 treesize of output 7 [2021-02-19 19:28:47,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:47,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:47,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:47,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:28:48,552 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 7 [2021-02-19 19:28:48,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:48,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:48,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:48,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:28:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:49,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:49,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:28:49,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170168490] [2021-02-19 19:28:49,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:28:49,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:49,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:28:49,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:28:49,491 INFO L87 Difference]: Start difference. First operand 7362 states and 22247 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:50,001 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 19:28:50,363 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-02-19 19:28:54,486 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 19:28:55,478 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 19:28:55,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:28:55,726 INFO L93 Difference]: Finished difference Result 9649 states and 28844 transitions. [2021-02-19 19:28:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:28:55,728 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:28:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:28:55,741 INFO L225 Difference]: With dead ends: 9649 [2021-02-19 19:28:55,741 INFO L226 Difference]: Without dead ends: 9602 [2021-02-19 19:28:55,742 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=247, Invalid=3413, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 19:28:55,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9602 states. [2021-02-19 19:28:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9602 to 7338. [2021-02-19 19:28:55,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7338 states, 7337 states have (on average 3.024124301485621) internal successors, (22188), 7337 states have internal predecessors, (22188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7338 states to 7338 states and 22188 transitions. [2021-02-19 19:28:55,854 INFO L78 Accepts]: Start accepts. Automaton has 7338 states and 22188 transitions. Word has length 48 [2021-02-19 19:28:55,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:28:55,854 INFO L480 AbstractCegarLoop]: Abstraction has 7338 states and 22188 transitions. [2021-02-19 19:28:55,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:55,855 INFO L276 IsEmpty]: Start isEmpty. Operand 7338 states and 22188 transitions. [2021-02-19 19:28:55,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:28:55,861 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:28:55,861 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:28:56,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-02-19 19:28:56,062 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:28:56,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:28:56,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1793525332, now seen corresponding path program 41 times [2021-02-19 19:28:56,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:28:56,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893918003] [2021-02-19 19:28:56,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:28:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:28:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:57,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893918003] [2021-02-19 19:28:57,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621967873] [2021-02-19 19:28:57,134 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:28:57,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:28:57,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:28:57,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:28:57,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:28:57,498 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 11 treesize of output 7 [2021-02-19 19:28:57,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:57,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:57,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:57,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:28:58,197 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 15 treesize of output 7 [2021-02-19 19:28:58,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:28:58,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:28:58,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:28:58,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:29 [2021-02-19 19:28:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:28:59,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:28:59,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:28:59,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78395513] [2021-02-19 19:28:59,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:28:59,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:28:59,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:28:59,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:28:59,193 INFO L87 Difference]: Start difference. First operand 7338 states and 22188 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:28:59,638 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 19:28:59,928 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 19:29:00,432 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 19:29:00,731 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-02-19 19:29:01,024 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-02-19 19:29:02,156 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2021-02-19 19:29:03,016 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-02-19 19:29:05,001 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-02-19 19:29:06,379 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 19:29:07,495 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-02-19 19:29:07,968 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 19:29:08,219 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 19:29:08,700 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-02-19 19:29:08,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:08,838 INFO L93 Difference]: Finished difference Result 7715 states and 23123 transitions. [2021-02-19 19:29:08,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:29:08,840 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:29:08,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:08,849 INFO L225 Difference]: With dead ends: 7715 [2021-02-19 19:29:08,850 INFO L226 Difference]: Without dead ends: 7675 [2021-02-19 19:29:08,850 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=306, Invalid=3854, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 19:29:08,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7675 states. [2021-02-19 19:29:08,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7675 to 7350. [2021-02-19 19:29:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7350 states, 7349 states have (on average 3.023948836576405) internal successors, (22223), 7349 states have internal predecessors, (22223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7350 states to 7350 states and 22223 transitions. [2021-02-19 19:29:08,926 INFO L78 Accepts]: Start accepts. Automaton has 7350 states and 22223 transitions. Word has length 48 [2021-02-19 19:29:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:08,927 INFO L480 AbstractCegarLoop]: Abstraction has 7350 states and 22223 transitions. [2021-02-19 19:29:08,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand 7350 states and 22223 transitions. [2021-02-19 19:29:08,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:29:08,933 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:08,933 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:09,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:09,134 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:09,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:09,134 INFO L82 PathProgramCache]: Analyzing trace with hash -29855402, now seen corresponding path program 42 times [2021-02-19 19:29:09,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:09,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365153182] [2021-02-19 19:29:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:10,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365153182] [2021-02-19 19:29:10,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166664515] [2021-02-19 19:29:10,302 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:10,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:29:10,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:10,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:29:10,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:10,685 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 7 [2021-02-19 19:29:10,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:29:10,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:29:10,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:29:10,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-02-19 19:29:11,422 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 11 treesize of output 7 [2021-02-19 19:29:11,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:29:11,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:29:11,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:29:11,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-02-19 19:29:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:12,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:12,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:29:12,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80548559] [2021-02-19 19:29:12,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:29:12,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:12,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:29:12,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:29:12,415 INFO L87 Difference]: Start difference. First operand 7350 states and 22223 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:13,050 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 19:29:13,464 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-02-19 19:29:18,780 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 19:29:20,193 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 19:29:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:20,473 INFO L93 Difference]: Finished difference Result 9651 states and 28853 transitions. [2021-02-19 19:29:20,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:29:20,476 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:29:20,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:20,488 INFO L225 Difference]: With dead ends: 9651 [2021-02-19 19:29:20,488 INFO L226 Difference]: Without dead ends: 9563 [2021-02-19 19:29:20,488 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=268, Invalid=3514, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:29:20,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9563 states. [2021-02-19 19:29:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9563 to 7275. [2021-02-19 19:29:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7275 states, 7274 states have (on average 3.030107231234534) internal successors, (22041), 7274 states have internal predecessors, (22041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:20,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7275 states to 7275 states and 22041 transitions. [2021-02-19 19:29:20,585 INFO L78 Accepts]: Start accepts. Automaton has 7275 states and 22041 transitions. Word has length 48 [2021-02-19 19:29:20,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:20,585 INFO L480 AbstractCegarLoop]: Abstraction has 7275 states and 22041 transitions. [2021-02-19 19:29:20,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:20,585 INFO L276 IsEmpty]: Start isEmpty. Operand 7275 states and 22041 transitions. [2021-02-19 19:29:20,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:29:20,592 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:20,592 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:20,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:20,792 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:20,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:20,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2047345296, now seen corresponding path program 43 times [2021-02-19 19:29:20,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:20,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855323439] [2021-02-19 19:29:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:22,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855323439] [2021-02-19 19:29:22,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682883528] [2021-02-19 19:29:22,072 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:22,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:29:22,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:22,483 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 11 treesize of output 7 [2021-02-19 19:29:22,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:29:22,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:29:22,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:29:22,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:29:23,252 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 7 [2021-02-19 19:29:23,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:29:23,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:29:23,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:29:23,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:29:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:24,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:24,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:29:24,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560961854] [2021-02-19 19:29:24,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:29:24,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:24,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:29:24,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:29:24,244 INFO L87 Difference]: Start difference. First operand 7275 states and 22041 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:24,556 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-02-19 19:29:24,776 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-02-19 19:29:25,178 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 19:29:28,339 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-02-19 19:29:30,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:30,278 INFO L93 Difference]: Finished difference Result 9874 states and 29411 transitions. [2021-02-19 19:29:30,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:29:30,281 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:29:30,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:30,294 INFO L225 Difference]: With dead ends: 9874 [2021-02-19 19:29:30,294 INFO L226 Difference]: Without dead ends: 9756 [2021-02-19 19:29:30,294 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=237, Invalid=3185, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 19:29:30,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9756 states. [2021-02-19 19:29:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9756 to 7315. [2021-02-19 19:29:30,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 7314 states have (on average 3.0263877495214655) internal successors, (22135), 7314 states have internal predecessors, (22135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 22135 transitions. [2021-02-19 19:29:30,391 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 22135 transitions. Word has length 48 [2021-02-19 19:29:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:30,391 INFO L480 AbstractCegarLoop]: Abstraction has 7315 states and 22135 transitions. [2021-02-19 19:29:30,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:30,391 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 22135 transitions. [2021-02-19 19:29:30,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:29:30,398 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:30,398 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:30,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:30,598 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:30,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1939894928, now seen corresponding path program 44 times [2021-02-19 19:29:30,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:30,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910024707] [2021-02-19 19:29:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:31,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910024707] [2021-02-19 19:29:31,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972305644] [2021-02-19 19:29:31,913 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:31,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:29:31,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:31,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:29:31,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:32,360 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 11 treesize of output 7 [2021-02-19 19:29:32,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:29:32,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:29:32,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:29:32,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:29:33,154 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 7 [2021-02-19 19:29:33,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:29:33,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:29:33,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:29:33,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:29:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:34,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:34,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-02-19 19:29:34,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249861720] [2021-02-19 19:29:34,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:29:34,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:34,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:29:34,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:29:34,378 INFO L87 Difference]: Start difference. First operand 7315 states and 22135 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:34,806 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-02-19 19:29:35,075 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-02-19 19:29:35,364 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2021-02-19 19:29:35,564 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-02-19 19:29:36,150 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 19:29:37,797 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-02-19 19:29:39,630 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-02-19 19:29:40,498 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-02-19 19:29:40,714 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-02-19 19:29:41,012 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-02-19 19:29:42,138 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 19:29:42,528 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 19:29:42,784 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-02-19 19:29:43,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:43,191 INFO L93 Difference]: Finished difference Result 7731 states and 23169 transitions. [2021-02-19 19:29:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:29:43,194 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:29:43,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:43,203 INFO L225 Difference]: With dead ends: 7731 [2021-02-19 19:29:43,203 INFO L226 Difference]: Without dead ends: 7691 [2021-02-19 19:29:43,204 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=300, Invalid=3990, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 19:29:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7691 states. [2021-02-19 19:29:43,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7691 to 7339. [2021-02-19 19:29:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7339 states, 7338 states have (on average 3.025483783047152) internal successors, (22201), 7338 states have internal predecessors, (22201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:43,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7339 states to 7339 states and 22201 transitions. [2021-02-19 19:29:43,281 INFO L78 Accepts]: Start accepts. Automaton has 7339 states and 22201 transitions. Word has length 48 [2021-02-19 19:29:43,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:43,281 INFO L480 AbstractCegarLoop]: Abstraction has 7339 states and 22201 transitions. [2021-02-19 19:29:43,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:43,281 INFO L276 IsEmpty]: Start isEmpty. Operand 7339 states and 22201 transitions. [2021-02-19 19:29:43,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:29:43,288 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:43,288 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:43,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:43,488 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:43,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1478889904, now seen corresponding path program 45 times [2021-02-19 19:29:43,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:43,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879256024] [2021-02-19 19:29:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:44,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879256024] [2021-02-19 19:29:44,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108023860] [2021-02-19 19:29:44,744 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:44,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:29:44,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:44,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 19:29:44,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:45,176 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 11 treesize of output 7 [2021-02-19 19:29:45,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:29:45,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:29:45,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:29:45,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:29:46,229 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 11 treesize of output 7 [2021-02-19 19:29:46,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:29:46,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:29:46,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:29:46,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-02-19 19:29:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:47,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:47,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-02-19 19:29:47,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308972424] [2021-02-19 19:29:47,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-02-19 19:29:47,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:47,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-02-19 19:29:47,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1681, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:29:47,475 INFO L87 Difference]: Start difference. First operand 7339 states and 22201 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:47,820 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 19:29:48,045 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 19:29:48,438 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-02-19 19:29:50,270 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-02-19 19:29:51,809 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-02-19 19:29:52,498 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-02-19 19:29:52,689 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-02-19 19:29:52,939 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-02-19 19:29:53,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:29:53,921 INFO L93 Difference]: Finished difference Result 9649 states and 28858 transitions. [2021-02-19 19:29:53,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:29:53,924 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:29:53,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:29:53,937 INFO L225 Difference]: With dead ends: 9649 [2021-02-19 19:29:53,937 INFO L226 Difference]: Without dead ends: 9610 [2021-02-19 19:29:53,938 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=264, Invalid=3768, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 19:29:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9610 states. [2021-02-19 19:29:54,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9610 to 7331. [2021-02-19 19:29:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7331 states, 7330 states have (on average 3.0252387448840383) internal successors, (22175), 7330 states have internal predecessors, (22175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7331 states to 7331 states and 22175 transitions. [2021-02-19 19:29:54,034 INFO L78 Accepts]: Start accepts. Automaton has 7331 states and 22175 transitions. Word has length 48 [2021-02-19 19:29:54,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:29:54,034 INFO L480 AbstractCegarLoop]: Abstraction has 7331 states and 22175 transitions. [2021-02-19 19:29:54,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 7331 states and 22175 transitions. [2021-02-19 19:29:54,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:29:54,041 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:29:54,041 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:29:54,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-02-19 19:29:54,241 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:29:54,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:29:54,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1620605044, now seen corresponding path program 46 times [2021-02-19 19:29:54,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:29:54,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970623386] [2021-02-19 19:29:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:29:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:29:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:55,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970623386] [2021-02-19 19:29:55,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183134549] [2021-02-19 19:29:55,582 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:29:55,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:29:55,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:29:55,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:29:55,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:29:56,080 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 11 treesize of output 7 [2021-02-19 19:29:56,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:29:56,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:29:56,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:29:56,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:29:56,926 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 7 [2021-02-19 19:29:56,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:29:56,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:29:56,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:29:56,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:29:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:29:58,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:29:58,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-02-19 19:29:58,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978069826] [2021-02-19 19:29:58,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:29:58,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:29:58,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:29:58,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:29:58,195 INFO L87 Difference]: Start difference. First operand 7331 states and 22175 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:29:58,684 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-02-19 19:29:58,974 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-02-19 19:29:59,465 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 19:30:01,113 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-02-19 19:30:02,087 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-19 19:30:04,445 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-02-19 19:30:05,730 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-02-19 19:30:06,088 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-02-19 19:30:07,401 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 19:30:07,853 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-02-19 19:30:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:08,450 INFO L93 Difference]: Finished difference Result 9802 states and 29231 transitions. [2021-02-19 19:30:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:30:08,453 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:30:08,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:08,466 INFO L225 Difference]: With dead ends: 9802 [2021-02-19 19:30:08,466 INFO L226 Difference]: Without dead ends: 9745 [2021-02-19 19:30:08,466 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=254, Invalid=3652, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:30:08,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9745 states. [2021-02-19 19:30:08,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9745 to 7323. [2021-02-19 19:30:08,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7323 states, 7322 states have (on average 3.0255394700901395) internal successors, (22153), 7322 states have internal predecessors, (22153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:08,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7323 states to 7323 states and 22153 transitions. [2021-02-19 19:30:08,561 INFO L78 Accepts]: Start accepts. Automaton has 7323 states and 22153 transitions. Word has length 48 [2021-02-19 19:30:08,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:08,561 INFO L480 AbstractCegarLoop]: Abstraction has 7323 states and 22153 transitions. [2021-02-19 19:30:08,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:08,561 INFO L276 IsEmpty]: Start isEmpty. Operand 7323 states and 22153 transitions. [2021-02-19 19:30:08,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:30:08,568 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:08,568 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:08,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-02-19 19:30:08,769 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:08,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:08,769 INFO L82 PathProgramCache]: Analyzing trace with hash 337457584, now seen corresponding path program 47 times [2021-02-19 19:30:08,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:08,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037996530] [2021-02-19 19:30:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:10,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037996530] [2021-02-19 19:30:10,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974199577] [2021-02-19 19:30:10,178 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:10,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:30:10,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:10,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 19:30:10,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:10,673 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 11 treesize of output 7 [2021-02-19 19:30:10,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:10,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:30:10,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:30:10,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:30:11,617 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 11 treesize of output 7 [2021-02-19 19:30:11,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:11,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:30:11,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:30:11,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-02-19 19:30:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:13,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:13,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-02-19 19:30:13,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456115831] [2021-02-19 19:30:13,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-02-19 19:30:13,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:13,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-02-19 19:30:13,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1678, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:30:13,298 INFO L87 Difference]: Start difference. First operand 7323 states and 22153 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:13,700 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-02-19 19:30:13,967 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-02-19 19:30:14,428 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 19:30:14,690 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-02-19 19:30:15,666 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-02-19 19:30:16,349 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-19 19:30:16,741 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 19:30:18,157 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-02-19 19:30:19,017 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 19:30:19,355 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-02-19 19:30:20,069 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-02-19 19:30:20,564 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 19:30:20,995 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 19:30:21,274 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-02-19 19:30:21,522 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-02-19 19:30:21,978 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-02-19 19:30:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:22,131 INFO L93 Difference]: Finished difference Result 9907 states and 29477 transitions. [2021-02-19 19:30:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 19:30:22,134 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:30:22,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:22,149 INFO L225 Difference]: With dead ends: 9907 [2021-02-19 19:30:22,149 INFO L226 Difference]: Without dead ends: 9821 [2021-02-19 19:30:22,150 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=298, Invalid=4394, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 19:30:22,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9821 states. [2021-02-19 19:30:22,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9821 to 7283. [2021-02-19 19:30:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7283 states, 7282 states have (on average 3.029250205987366) internal successors, (22059), 7282 states have internal predecessors, (22059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:22,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 22059 transitions. [2021-02-19 19:30:22,254 INFO L78 Accepts]: Start accepts. Automaton has 7283 states and 22059 transitions. Word has length 48 [2021-02-19 19:30:22,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:22,254 INFO L480 AbstractCegarLoop]: Abstraction has 7283 states and 22059 transitions. [2021-02-19 19:30:22,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:22,254 INFO L276 IsEmpty]: Start isEmpty. Operand 7283 states and 22059 transitions. [2021-02-19 19:30:22,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:30:22,262 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:22,262 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:22,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-02-19 19:30:22,462 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:22,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:22,462 INFO L82 PathProgramCache]: Analyzing trace with hash -404664776, now seen corresponding path program 48 times [2021-02-19 19:30:22,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:22,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082609217] [2021-02-19 19:30:22,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:23,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082609217] [2021-02-19 19:30:23,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365144221] [2021-02-19 19:30:23,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:23,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:30:23,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:23,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 19:30:23,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:24,434 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 7 [2021-02-19 19:30:24,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:24,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:30:24,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:30:24,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-02-19 19:30:25,482 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 11 treesize of output 7 [2021-02-19 19:30:25,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:25,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:30:25,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:30:25,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-02-19 19:30:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:27,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:27,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 41 [2021-02-19 19:30:27,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078491605] [2021-02-19 19:30:27,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:30:27,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:27,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:30:27,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1597, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:30:27,019 INFO L87 Difference]: Start difference. First operand 7283 states and 22059 transitions. Second operand has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:27,395 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-02-19 19:30:27,657 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-02-19 19:30:27,921 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 19:30:28,118 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 19:30:28,412 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-02-19 19:30:29,225 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-02-19 19:30:29,571 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-02-19 19:30:29,956 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 19:30:30,296 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-02-19 19:30:30,573 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-02-19 19:30:30,875 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-02-19 19:30:31,332 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-02-19 19:30:31,854 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-02-19 19:30:32,217 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-02-19 19:30:33,053 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-02-19 19:30:33,257 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 19:30:33,946 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 19:30:34,318 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-02-19 19:30:34,573 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-02-19 19:30:35,116 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 19:30:35,322 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-02-19 19:30:35,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:35,837 INFO L93 Difference]: Finished difference Result 9709 states and 28997 transitions. [2021-02-19 19:30:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 19:30:35,840 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:30:35,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:35,852 INFO L225 Difference]: With dead ends: 9709 [2021-02-19 19:30:35,853 INFO L226 Difference]: Without dead ends: 9574 [2021-02-19 19:30:35,853 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=326, Invalid=4504, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 19:30:35,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9574 states. [2021-02-19 19:30:35,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9574 to 7275. [2021-02-19 19:30:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7275 states, 7274 states have (on average 3.0299697552928238) internal successors, (22040), 7274 states have internal predecessors, (22040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:35,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7275 states to 7275 states and 22040 transitions. [2021-02-19 19:30:35,947 INFO L78 Accepts]: Start accepts. Automaton has 7275 states and 22040 transitions. Word has length 48 [2021-02-19 19:30:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:35,947 INFO L480 AbstractCegarLoop]: Abstraction has 7275 states and 22040 transitions. [2021-02-19 19:30:35,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 7275 states and 22040 transitions. [2021-02-19 19:30:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:30:35,954 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:35,954 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:36,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:36,155 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:36,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:36,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2131870152, now seen corresponding path program 49 times [2021-02-19 19:30:36,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:36,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019607048] [2021-02-19 19:30:36,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:37,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019607048] [2021-02-19 19:30:37,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394498651] [2021-02-19 19:30:37,665 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:37,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:30:37,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:38,189 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 11 treesize of output 7 [2021-02-19 19:30:38,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:38,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:30:38,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:30:38,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:30:39,146 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 7 [2021-02-19 19:30:39,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:39,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:30:39,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:30:39,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:30:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:40,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:40,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 19:30:40,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024638560] [2021-02-19 19:30:40,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:30:40,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:40,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:30:40,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:30:40,526 INFO L87 Difference]: Start difference. First operand 7275 states and 22040 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:41,007 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-02-19 19:30:41,284 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 19:30:41,608 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-02-19 19:30:41,834 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 19:30:42,155 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-02-19 19:30:43,047 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-02-19 19:30:43,452 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-02-19 19:30:44,321 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-02-19 19:30:44,801 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-02-19 19:30:45,717 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-02-19 19:30:46,538 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-02-19 19:30:47,043 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-02-19 19:30:47,412 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-02-19 19:30:49,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:49,728 INFO L93 Difference]: Finished difference Result 9934 states and 29553 transitions. [2021-02-19 19:30:49,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:30:49,732 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:30:49,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:49,746 INFO L225 Difference]: With dead ends: 9934 [2021-02-19 19:30:49,746 INFO L226 Difference]: Without dead ends: 9816 [2021-02-19 19:30:49,746 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=237, Invalid=3185, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 19:30:49,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9816 states. [2021-02-19 19:30:49,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9816 to 7383. [2021-02-19 19:30:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7383 states, 7382 states have (on average 3.021403413709022) internal successors, (22304), 7382 states have internal predecessors, (22304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7383 states to 7383 states and 22304 transitions. [2021-02-19 19:30:49,846 INFO L78 Accepts]: Start accepts. Automaton has 7383 states and 22304 transitions. Word has length 48 [2021-02-19 19:30:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:49,846 INFO L480 AbstractCegarLoop]: Abstraction has 7383 states and 22304 transitions. [2021-02-19 19:30:49,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 7383 states and 22304 transitions. [2021-02-19 19:30:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:30:49,854 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:49,854 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:50,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-02-19 19:30:50,054 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:50,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:50,055 INFO L82 PathProgramCache]: Analyzing trace with hash 781660226, now seen corresponding path program 50 times [2021-02-19 19:30:50,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:50,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303387524] [2021-02-19 19:30:50,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:51,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303387524] [2021-02-19 19:30:51,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207673046] [2021-02-19 19:30:51,705 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:51,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:30:51,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:51,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:30:51,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:52,210 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 11 treesize of output 7 [2021-02-19 19:30:52,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:52,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:30:52,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:30:52,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:30:53,362 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 7 [2021-02-19 19:30:53,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:53,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:30:53,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:30:53,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:30:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:55,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:55,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-02-19 19:30:55,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790835570] [2021-02-19 19:30:55,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:30:55,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:55,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:30:55,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:30:55,068 INFO L87 Difference]: Start difference. First operand 7383 states and 22304 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:55,612 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 19:30:56,010 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 19:30:56,337 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2021-02-19 19:30:56,635 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 19:30:56,970 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-02-19 19:30:57,325 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-02-19 19:30:58,006 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-02-19 19:30:58,389 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2021-02-19 19:30:59,229 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-02-19 19:30:59,701 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-02-19 19:31:00,144 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-02-19 19:31:00,648 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-02-19 19:31:01,106 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2021-02-19 19:31:01,516 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-02-19 19:31:02,087 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 19:31:02,496 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-02-19 19:31:02,994 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-02-19 19:31:04,288 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-02-19 19:31:04,693 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 19:31:05,011 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-02-19 19:31:05,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:05,447 INFO L93 Difference]: Finished difference Result 7800 states and 23332 transitions. [2021-02-19 19:31:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:31:05,451 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:31:05,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:05,462 INFO L225 Difference]: With dead ends: 7800 [2021-02-19 19:31:05,462 INFO L226 Difference]: Without dead ends: 7760 [2021-02-19 19:31:05,462 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=300, Invalid=3990, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 19:31:05,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7760 states. [2021-02-19 19:31:05,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7760 to 7419. [2021-02-19 19:31:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7419 states, 7418 states have (on average 3.020086276624427) internal successors, (22403), 7418 states have internal predecessors, (22403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7419 states to 7419 states and 22403 transitions. [2021-02-19 19:31:05,543 INFO L78 Accepts]: Start accepts. Automaton has 7419 states and 22403 transitions. Word has length 48 [2021-02-19 19:31:05,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:05,544 INFO L480 AbstractCegarLoop]: Abstraction has 7419 states and 22403 transitions. [2021-02-19 19:31:05,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:05,544 INFO L276 IsEmpty]: Start isEmpty. Operand 7419 states and 22403 transitions. [2021-02-19 19:31:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:31:05,551 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:05,551 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:05,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:31:05,759 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:05,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:05,759 INFO L82 PathProgramCache]: Analyzing trace with hash 552901382, now seen corresponding path program 51 times [2021-02-19 19:31:05,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:05,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109564295] [2021-02-19 19:31:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:07,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109564295] [2021-02-19 19:31:07,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406620704] [2021-02-19 19:31:07,363 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:31:07,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:31:07,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:31:07,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-02-19 19:31:07,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:07,887 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 11 treesize of output 7 [2021-02-19 19:31:07,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:31:07,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:31:07,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:31:07,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:31:09,298 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 11 treesize of output 7 [2021-02-19 19:31:09,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:31:09,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:31:09,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:31:09,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-02-19 19:31:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:10,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:10,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2021-02-19 19:31:10,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371756012] [2021-02-19 19:31:10,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-02-19 19:31:10,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:10,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-02-19 19:31:10,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1763, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:31:10,937 INFO L87 Difference]: Start difference. First operand 7419 states and 22403 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:11,451 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 19:31:11,809 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 19:31:12,160 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-02-19 19:31:12,414 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-02-19 19:31:12,804 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 19:31:13,822 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-02-19 19:31:14,315 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-02-19 19:31:15,154 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-02-19 19:31:15,341 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-02-19 19:31:15,827 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-02-19 19:31:16,251 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-02-19 19:31:18,510 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-02-19 19:31:19,154 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 19:31:19,665 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 19:31:20,129 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 19:31:20,779 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-02-19 19:31:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:22,797 INFO L93 Difference]: Finished difference Result 9733 states and 29067 transitions. [2021-02-19 19:31:22,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 19:31:22,802 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:31:22,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:22,815 INFO L225 Difference]: With dead ends: 9733 [2021-02-19 19:31:22,815 INFO L226 Difference]: Without dead ends: 9688 [2021-02-19 19:31:22,815 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=293, Invalid=4263, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 19:31:22,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9688 states. [2021-02-19 19:31:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9688 to 7407. [2021-02-19 19:31:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7407 states, 7406 states have (on average 3.019443694301917) internal successors, (22362), 7406 states have internal predecessors, (22362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7407 states to 7407 states and 22362 transitions. [2021-02-19 19:31:22,908 INFO L78 Accepts]: Start accepts. Automaton has 7407 states and 22362 transitions. Word has length 48 [2021-02-19 19:31:22,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:22,909 INFO L480 AbstractCegarLoop]: Abstraction has 7407 states and 22362 transitions. [2021-02-19 19:31:22,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:22,909 INFO L276 IsEmpty]: Start isEmpty. Operand 7407 states and 22362 transitions. [2021-02-19 19:31:22,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:31:22,915 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:22,915 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:23,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:31:23,116 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:23,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:23,116 INFO L82 PathProgramCache]: Analyzing trace with hash -393830418, now seen corresponding path program 52 times [2021-02-19 19:31:23,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:23,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143835976] [2021-02-19 19:31:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:24,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143835976] [2021-02-19 19:31:24,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161544289] [2021-02-19 19:31:24,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:31:24,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:31:24,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:31:24,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:31:24,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:25,416 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 11 treesize of output 7 [2021-02-19 19:31:25,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:31:25,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:31:25,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:31:25,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:31:26,497 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 7 [2021-02-19 19:31:26,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:31:26,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:31:26,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:31:26,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-02-19 19:31:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:28,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:28,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-02-19 19:31:28,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412778744] [2021-02-19 19:31:28,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:31:28,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:28,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:31:28,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:31:28,045 INFO L87 Difference]: Start difference. First operand 7407 states and 22362 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:28,638 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-02-19 19:31:28,996 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 19:31:29,366 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-02-19 19:31:29,601 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 19:31:29,964 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-02-19 19:31:30,912 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-02-19 19:31:31,100 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-02-19 19:31:31,675 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-02-19 19:31:32,772 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-02-19 19:31:33,384 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-02-19 19:31:33,929 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-02-19 19:31:34,519 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-02-19 19:31:35,036 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-02-19 19:31:35,456 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-02-19 19:31:36,101 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-02-19 19:31:36,551 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-02-19 19:31:39,018 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 19:31:39,540 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-02-19 19:31:39,907 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-02-19 19:31:40,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:40,201 INFO L93 Difference]: Finished difference Result 9878 states and 29415 transitions. [2021-02-19 19:31:40,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:31:40,205 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 19:31:40,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:40,219 INFO L225 Difference]: With dead ends: 9878 [2021-02-19 19:31:40,219 INFO L226 Difference]: Without dead ends: 9819 [2021-02-19 19:31:40,220 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=254, Invalid=3652, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:31:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9819 states. [2021-02-19 19:31:40,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9819 to 7395. [2021-02-19 19:31:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7395 states, 7394 states have (on average 3.020016229375169) internal successors, (22330), 7394 states have internal predecessors, (22330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:40,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7395 states to 7395 states and 22330 transitions. [2021-02-19 19:31:40,324 INFO L78 Accepts]: Start accepts. Automaton has 7395 states and 22330 transitions. Word has length 48 [2021-02-19 19:31:40,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:40,324 INFO L480 AbstractCegarLoop]: Abstraction has 7395 states and 22330 transitions. [2021-02-19 19:31:40,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:40,324 INFO L276 IsEmpty]: Start isEmpty. Operand 7395 states and 22330 transitions. [2021-02-19 19:31:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 19:31:40,332 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:40,333 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:40,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:31:40,533 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:40,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:40,533 INFO L82 PathProgramCache]: Analyzing trace with hash -548267936, now seen corresponding path program 53 times [2021-02-19 19:31:40,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:40,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629915255] [2021-02-19 19:31:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:42,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629915255] [2021-02-19 19:31:42,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769783640] [2021-02-19 19:31:42,224 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:31:42,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:31:42,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:31:42,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 19:31:42,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:42,870 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 11 treesize of output 7 [2021-02-19 19:31:42,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:31:42,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:31:42,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:31:42,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-02-19 19:31:43,937 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 11 treesize of output 7 [2021-02-19 19:31:43,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:31:43,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:31:43,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:31:43,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-02-19 19:31:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:45,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:45,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-02-19 19:31:45,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289970048] [2021-02-19 19:31:45,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-02-19 19:31:45,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:45,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-02-19 19:31:45,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1678, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:31:45,926 INFO L87 Difference]: Start difference. First operand 7395 states and 22330 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:46,457 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-02-19 19:31:46,782 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 19:31:47,100 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-02-19 19:31:47,336 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 19:31:47,683 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-02-19 19:31:48,608 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-02-19 19:31:49,053 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-02-19 19:31:49,574 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-02-19 19:31:50,015 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-02-19 19:31:50,537 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-02-19 19:31:50,997 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 Received shutdown request... [2021-02-19 19:31:51,542 WARN L219 SmtUtils]: Removed 4 from assertion stack [2021-02-19 19:31:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:31:51,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:31:51,742 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 19:31:51,745 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 19:31:51,746 INFO L202 PluginConnector]: Adding new model queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 07:31:51 BasicIcfg [2021-02-19 19:31:51,746 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 19:31:51,746 INFO L168 Benchmark]: Toolchain (without parser) took 548310.21 ms. Allocated memory was 255.9 MB in the beginning and 1.1 GB in the end (delta: 843.1 MB). Free memory was 236.0 MB in the beginning and 465.0 MB in the end (delta: -229.0 MB). Peak memory consumption was 615.0 MB. Max. memory is 16.0 GB. [2021-02-19 19:31:51,746 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.2 MB in the beginning and 237.1 MB in the end (delta: 89.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:31:51,746 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.34 ms. Allocated memory is still 255.9 MB. Free memory was 235.4 MB in the beginning and 234.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:31:51,746 INFO L168 Benchmark]: Boogie Preprocessor took 10.65 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 232.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:31:51,746 INFO L168 Benchmark]: RCFGBuilder took 241.73 ms. Allocated memory is still 255.9 MB. Free memory was 232.9 MB in the beginning and 232.6 MB in the end (delta: 223.6 kB). Peak memory consumption was 20.6 MB. Max. memory is 16.0 GB. [2021-02-19 19:31:51,746 INFO L168 Benchmark]: TraceAbstraction took 548033.12 ms. Allocated memory was 255.9 MB in the beginning and 1.1 GB in the end (delta: 843.1 MB). Free memory was 232.2 MB in the beginning and 465.0 MB in the end (delta: -232.8 MB). Peak memory consumption was 609.1 MB. Max. memory is 16.0 GB. [2021-02-19 19:31:51,746 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.2 MB in the beginning and 237.1 MB in the end (delta: 89.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.34 ms. Allocated memory is still 255.9 MB. Free memory was 235.4 MB in the beginning and 234.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.65 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 232.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 241.73 ms. Allocated memory is still 255.9 MB. Free memory was 232.9 MB in the beginning and 232.6 MB in the end (delta: 223.6 kB). Peak memory consumption was 20.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 548033.12 ms. Allocated memory was 255.9 MB in the beginning and 1.1 GB in the end (delta: 843.1 MB). Free memory was 232.2 MB in the beginning and 465.0 MB in the end (delta: -232.8 MB). Peak memory consumption was 609.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 95). Cancelled while BasicCegarLoop was constructing difference of abstraction (7395states) and FLOYD_HOARE automaton (currently 24 states, 43 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 33 for 95ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 547.9s, OverallIterations: 143, TraceHistogramMax: 2, AutomataDifference: 342.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 22456 SDtfs, 35898 SDslu, 289385 SDs, 0 SdLazy, 190359 SolverSat, 4511 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 76.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9753 GetRequests, 3575 SyntacticMatches, 243 SemanticMatches, 5934 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75894 ImplicationChecksByTransitivity, 287.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7450occurred in iteration=115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.9s AutomataMinimizationTime, 142 MinimizatonAttempts, 159356 StatesRemovedByMinimization, 138 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 164.2s InterpolantComputationTime, 10865 NumberOfCodeBlocks, 10865 NumberOfCodeBlocksAsserted, 410 NumberOfCheckSat, 10583 ConstructedInterpolants, 0 QuantifiedInterpolants, 9816883 SizeOfPredicates, 1442 NumberOfNonLiveVariables, 13659 ConjunctsInSsa, 4257 ConjunctsInUnsatCore, 282 InterpolantComputations, 5 PerfectInterpolantSequences, 58/2032 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