/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 21:53:31,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 21:53:31,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 21:53:32,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 21:53:32,061 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 21:53:32,075 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 21:53:32,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 21:53:32,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 21:53:32,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 21:53:32,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 21:53:32,078 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 21:53:32,078 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 21:53:32,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 21:53:32,078 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 21:53:32,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 21:53:32,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 21:53:32,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 21:53:32,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 21:53:32,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 21:53:32,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 21:53:32,080 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 21:53:32,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 21:53:32,080 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 21:53:32,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 21:53:32,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 21:53:32,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 21:53:32,080 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 21:53:32,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 21:53:32,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:53:32,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 21:53:32,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 21:53:32,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 21:53:32,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 21:53:32,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 21:53:32,082 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 21:53:32,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 21:53:32,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 21:53:32,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 21:53:32,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 21:53:32,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 21:53:32,321 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 21:53:32,321 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 21:53:32,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl [2021-06-12 21:53:32,322 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl' [2021-06-12 21:53:32,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 21:53:32,354 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 21:53:32,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 21:53:32,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 21:53:32,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 21:53:32,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:32" (1/1) ... [2021-06-12 21:53:32,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:32" (1/1) ... [2021-06-12 21:53:32,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 21:53:32,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 21:53:32,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 21:53:32,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 21:53:32,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:32" (1/1) ... [2021-06-12 21:53:32,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:32" (1/1) ... [2021-06-12 21:53:32,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:32" (1/1) ... [2021-06-12 21:53:32,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:32" (1/1) ... [2021-06-12 21:53:32,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:32" (1/1) ... [2021-06-12 21:53:32,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:32" (1/1) ... [2021-06-12 21:53:32,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:32" (1/1) ... [2021-06-12 21:53:32,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 21:53:32,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 21:53:32,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 21:53:32,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 21:53:32,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:53:32,464 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 21:53:32,465 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 21:53:32,465 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 21:53:32,465 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 21:53:32,465 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 21:53:32,465 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 21:53:32,466 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 21:53:32,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 21:53:32,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 21:53:32,467 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 21:53:32,660 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 21:53:32,661 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 21:53:32,662 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:53:32 BoogieIcfgContainer [2021-06-12 21:53:32,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 21:53:32,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 21:53:32,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 21:53:32,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 21:53:32,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:32" (1/2) ... [2021-06-12 21:53:32,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f85a86 and model type inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 09:53:32, skipping insertion in model container [2021-06-12 21:53:32,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:53:32" (2/2) ... [2021-06-12 21:53:32,667 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq-array.wvr.bpl [2021-06-12 21:53:32,671 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 21:53:32,671 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 21:53:32,671 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 21:53:32,671 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 21:53:32,725 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 21:53:32,738 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 21:53:32,769 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 21:53:32,770 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 21:53:32,770 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 21:53:32,770 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 21:53:32,770 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 21:53:32,770 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 21:53:32,770 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 21:53:32,770 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 21:53:32,776 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-06-12 21:53:32,792 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:32,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 21:53:32,799 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:32,800 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:32,800 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:32,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:32,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-06-12 21:53:32,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:32,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464381059] [2021-06-12 21:53:32,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:32,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:32,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464381059] [2021-06-12 21:53:32,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464381059] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:53:32,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:53:32,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 21:53:32,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351231976] [2021-06-12 21:53:32,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:53:32,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:32,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:53:32,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:53:32,945 INFO L87 Difference]: Start difference. First operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:32,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:32,971 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-06-12 21:53:32,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:53:32,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 21:53:32,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:32,981 INFO L225 Difference]: With dead ends: 104 [2021-06-12 21:53:32,982 INFO L226 Difference]: Without dead ends: 87 [2021-06-12 21:53:32,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:53:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-12 21:53:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-06-12 21:53:33,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-06-12 21:53:33,021 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-06-12 21:53:33,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:33,021 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-06-12 21:53:33,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:33,021 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-06-12 21:53:33,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 21:53:33,023 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:33,023 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:33,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 21:53:33,023 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:33,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:33,026 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-06-12 21:53:33,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:33,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270671939] [2021-06-12 21:53:33,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:33,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:33,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270671939] [2021-06-12 21:53:33,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270671939] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:53:33,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:53:33,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 21:53:33,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612915825] [2021-06-12 21:53:33,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 21:53:33,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:33,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 21:53:33,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 21:53:33,079 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:33,097 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-06-12 21:53:33,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 21:53:33,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 21:53:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:33,098 INFO L225 Difference]: With dead ends: 91 [2021-06-12 21:53:33,098 INFO L226 Difference]: Without dead ends: 83 [2021-06-12 21:53:33,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 21:53:33,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-12 21:53:33,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-06-12 21:53:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-06-12 21:53:33,105 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-06-12 21:53:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:33,106 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-06-12 21:53:33,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-06-12 21:53:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:53:33,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:33,107 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:33,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 21:53:33,107 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:33,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:33,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-06-12 21:53:33,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:33,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889378666] [2021-06-12 21:53:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:33,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:33,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889378666] [2021-06-12 21:53:33,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889378666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:33,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653917999] [2021-06-12 21:53:33,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:33,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:53:33,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:33,444 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 13 treesize of output 9 [2021-06-12 21:53:33,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:33,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:33,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:33,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-12 21:53:33,490 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 [2021-06-12 21:53:33,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:33,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:33,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:33,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-06-12 21:53:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:33,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653917999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:33,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:33,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 21:53:33,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437588636] [2021-06-12 21:53:33,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:53:33,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:33,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:53:33,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:53:33,509 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:33,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:33,599 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-06-12 21:53:33,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:53:33,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:53:33,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:33,603 INFO L225 Difference]: With dead ends: 154 [2021-06-12 21:53:33,603 INFO L226 Difference]: Without dead ends: 137 [2021-06-12 21:53:33,605 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:53:33,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-12 21:53:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-06-12 21:53:33,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-06-12 21:53:33,613 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-06-12 21:53:33,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:33,614 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-06-12 21:53:33,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:33,614 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-06-12 21:53:33,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:53:33,614 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:33,615 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:33,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-12 21:53:33,829 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:33,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:33,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-06-12 21:53:33,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:33,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241284686] [2021-06-12 21:53:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:33,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:33,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241284686] [2021-06-12 21:53:33,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241284686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:33,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306466838] [2021-06-12 21:53:33,892 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 [2021-06-12 21:53:33,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:53:33,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:33,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 21:53:33,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:34,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306466838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:34,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:34,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-12 21:53:34,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766562535] [2021-06-12 21:53:34,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 21:53:34,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:34,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 21:53:34,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:53:34,012 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:34,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:34,080 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-06-12 21:53:34,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:53:34,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:53:34,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:34,082 INFO L225 Difference]: With dead ends: 284 [2021-06-12 21:53:34,082 INFO L226 Difference]: Without dead ends: 264 [2021-06-12 21:53:34,082 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:53:34,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-12 21:53:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-06-12 21:53:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-06-12 21:53:34,107 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-06-12 21:53:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:34,107 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-06-12 21:53:34,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:34,107 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-06-12 21:53:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:53:34,109 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:34,109 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:34,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:34,310 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-06-12 21:53:34,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:34,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061564557] [2021-06-12 21:53:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:34,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:34,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061564557] [2021-06-12 21:53:34,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061564557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:34,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503973924] [2021-06-12 21:53:34,611 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 [2021-06-12 21:53:34,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:53:34,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:34,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:53:34,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:34,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:34,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-06-12 21:53:34,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:34,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:34,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:34,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-06-12 21:53:35,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:35,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2021-06-12 21:53:35,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:53:35,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:35,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:35,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-06-12 21:53:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:35,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503973924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:35,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:35,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-06-12 21:53:35,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427381530] [2021-06-12 21:53:35,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:53:35,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:35,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:53:35,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:53:35,229 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:36,692 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-06-12 21:53:36,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:53:36,693 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 21:53:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:36,695 INFO L225 Difference]: With dead ends: 650 [2021-06-12 21:53:36,695 INFO L226 Difference]: Without dead ends: 573 [2021-06-12 21:53:36,696 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1255.3ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 21:53:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-12 21:53:36,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-06-12 21:53:36,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.1818181818181817) internal successors, (840), 385 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:36,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-06-12 21:53:36,711 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-06-12 21:53:36,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:36,712 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-06-12 21:53:36,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:36,712 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-06-12 21:53:36,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:53:36,713 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:36,714 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:36,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:36,933 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:36,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:36,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-06-12 21:53:36,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:36,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084912140] [2021-06-12 21:53:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:53:37,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:37,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084912140] [2021-06-12 21:53:37,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084912140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:37,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890346990] [2021-06-12 21:53:37,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:37,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:53:37,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:37,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:53:37,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:37,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:37,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-06-12 21:53:37,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:37,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:37,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:37,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-12 21:53:37,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:37,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:37,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-12 21:53:37,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:37,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:37,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:37,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-12 21:53:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:37,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890346990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:37,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:37,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-12 21:53:37,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754802875] [2021-06-12 21:53:37,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:53:37,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:37,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:53:37,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:53:37,579 INFO L87 Difference]: Start difference. First operand 386 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:38,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:38,154 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-06-12 21:53:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:53:38,155 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 21:53:38,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:38,158 INFO L225 Difference]: With dead ends: 1023 [2021-06-12 21:53:38,158 INFO L226 Difference]: Without dead ends: 878 [2021-06-12 21:53:38,159 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 509.7ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:53:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-12 21:53:38,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-06-12 21:53:38,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.1786542923433876) internal successors, (939), 431 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-06-12 21:53:38,170 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-06-12 21:53:38,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:38,171 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-06-12 21:53:38,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:38,171 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-06-12 21:53:38,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:53:38,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:38,173 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:38,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:38,377 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:38,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:38,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-06-12 21:53:38,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:38,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393452671] [2021-06-12 21:53:38,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:38,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:38,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393452671] [2021-06-12 21:53:38,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393452671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:38,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982513840] [2021-06-12 21:53:38,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:38,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:53:38,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:38,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:53:38,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:38,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:38,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-12 21:53:38,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:38,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:38,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:38,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-06-12 21:53:38,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:38,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:38,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-06-12 21:53:38,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:38,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:38,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:38,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-12 21:53:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:38,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982513840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:38,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:38,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-12 21:53:38,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586884976] [2021-06-12 21:53:38,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:53:38,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:38,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:53:38,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:53:38,918 INFO L87 Difference]: Start difference. First operand 432 states and 939 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:39,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:39,596 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-06-12 21:53:39,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:53:39,597 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 21:53:39,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:39,600 INFO L225 Difference]: With dead ends: 1081 [2021-06-12 21:53:39,600 INFO L226 Difference]: Without dead ends: 927 [2021-06-12 21:53:39,601 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 536.8ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:53:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-12 21:53:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-06-12 21:53:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.1848552338530065) internal successors, (981), 449 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-06-12 21:53:39,612 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-06-12 21:53:39,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:39,612 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-06-12 21:53:39,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:39,612 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-06-12 21:53:39,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:53:39,613 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:39,613 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:39,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 21:53:39,829 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:39,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:39,830 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-06-12 21:53:39,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:39,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144523734] [2021-06-12 21:53:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:53:40,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:40,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144523734] [2021-06-12 21:53:40,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144523734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:40,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240082921] [2021-06-12 21:53:40,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:40,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:53:40,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:40,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:53:40,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:40,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:40,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-12 21:53:40,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:40,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:40,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:40,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:18 [2021-06-12 21:53:40,272 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:53:40,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-06-12 21:53:40,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:40,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:40,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:40,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:5 [2021-06-12 21:53:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:40,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240082921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:40,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:40,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-12 21:53:40,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098929764] [2021-06-12 21:53:40,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:53:40,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:40,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:53:40,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:53:40,290 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:40,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:40,933 INFO L93 Difference]: Finished difference Result 1050 states and 2217 transitions. [2021-06-12 21:53:40,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:53:40,933 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 32 [2021-06-12 21:53:40,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:40,936 INFO L225 Difference]: With dead ends: 1050 [2021-06-12 21:53:40,937 INFO L226 Difference]: Without dead ends: 939 [2021-06-12 21:53:40,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 610.5ms TimeCoverageRelationStatistics Valid=378, Invalid=1974, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:53:40,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-06-12 21:53:40,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 482. [2021-06-12 21:53:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.176715176715177) internal successors, (1047), 481 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1047 transitions. [2021-06-12 21:53:40,947 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1047 transitions. Word has length 32 [2021-06-12 21:53:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:40,948 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1047 transitions. [2021-06-12 21:53:40,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1047 transitions. [2021-06-12 21:53:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:53:40,950 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:40,950 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:41,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:41,161 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:41,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:41,161 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-06-12 21:53:41,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:41,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42385956] [2021-06-12 21:53:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:41,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:41,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42385956] [2021-06-12 21:53:41,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42385956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:41,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821734958] [2021-06-12 21:53:41,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:41,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:53:41,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:41,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:41,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-06-12 21:53:41,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:41,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:41,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:41,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-12 21:53:41,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:41,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:41,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:41,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-12 21:53:41,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:41,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:41,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:41,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-12 21:53:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:41,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821734958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:41,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:41,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-12 21:53:41,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483446582] [2021-06-12 21:53:41,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:53:41,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:41,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:53:41,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:53:41,690 INFO L87 Difference]: Start difference. First operand 482 states and 1047 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:42,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:42,200 INFO L93 Difference]: Finished difference Result 1045 states and 2215 transitions. [2021-06-12 21:53:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:53:42,201 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 21:53:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:42,203 INFO L225 Difference]: With dead ends: 1045 [2021-06-12 21:53:42,203 INFO L226 Difference]: Without dead ends: 947 [2021-06-12 21:53:42,204 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 430.8ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:53:42,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-06-12 21:53:42,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 464. [2021-06-12 21:53:42,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.1576673866090714) internal successors, (999), 463 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:42,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 999 transitions. [2021-06-12 21:53:42,213 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 999 transitions. Word has length 32 [2021-06-12 21:53:42,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:42,214 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 999 transitions. [2021-06-12 21:53:42,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:42,214 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 999 transitions. [2021-06-12 21:53:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 21:53:42,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:42,215 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:42,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:42,429 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-06-12 21:53:42,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:42,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539598001] [2021-06-12 21:53:42,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:42,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:42,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539598001] [2021-06-12 21:53:42,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539598001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:42,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487917839] [2021-06-12 21:53:42,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:42,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:53:42,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:42,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:53:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:42,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487917839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:42,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:42,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-06-12 21:53:42,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704673916] [2021-06-12 21:53:42,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:53:42,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:42,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:53:42,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:53:42,553 INFO L87 Difference]: Start difference. First operand 464 states and 999 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:42,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:42,603 INFO L93 Difference]: Finished difference Result 882 states and 1900 transitions. [2021-06-12 21:53:42,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 21:53:42,604 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 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 36 [2021-06-12 21:53:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:42,607 INFO L225 Difference]: With dead ends: 882 [2021-06-12 21:53:42,607 INFO L226 Difference]: Without dead ends: 844 [2021-06-12 21:53:42,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:53:42,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-06-12 21:53:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 713. [2021-06-12 21:53:42,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 2.182584269662921) internal successors, (1554), 712 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:42,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1554 transitions. [2021-06-12 21:53:42,618 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1554 transitions. Word has length 36 [2021-06-12 21:53:42,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:42,618 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 1554 transitions. [2021-06-12 21:53:42,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:42,619 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1554 transitions. [2021-06-12 21:53:42,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:53:42,620 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:42,620 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:42,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 21:53:42,833 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:42,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-06-12 21:53:42,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:42,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126883501] [2021-06-12 21:53:42,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:43,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:43,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126883501] [2021-06-12 21:53:43,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126883501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:43,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531161319] [2021-06-12 21:53:43,154 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 [2021-06-12 21:53:43,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:53:43,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:43,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 21:53:43,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:43,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:43,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2021-06-12 21:53:43,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:43,498 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.5 percent of original size [2021-06-12 21:53:43,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:43,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:52 [2021-06-12 21:53:43,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:43,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:43,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:43,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:43,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 21:53:43,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:53:43,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:43,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:43,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-06-12 21:53:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:43,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531161319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:43,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:43,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-12 21:53:43,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240570567] [2021-06-12 21:53:43,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-12 21:53:43,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:43,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-12 21:53:43,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:53:43,814 INFO L87 Difference]: Start difference. First operand 713 states and 1554 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:46,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:46,997 INFO L93 Difference]: Finished difference Result 2812 states and 6023 transitions. [2021-06-12 21:53:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-12 21:53:46,997 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 21:53:46,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:47,003 INFO L225 Difference]: With dead ends: 2812 [2021-06-12 21:53:47,004 INFO L226 Difference]: Without dead ends: 2548 [2021-06-12 21:53:47,006 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 2640.0ms TimeCoverageRelationStatistics Valid=1451, Invalid=10321, Unknown=0, NotChecked=0, Total=11772 [2021-06-12 21:53:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-12 21:53:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 737. [2021-06-12 21:53:47,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.1480978260869565) internal successors, (1581), 736 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:47,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-06-12 21:53:47,024 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-06-12 21:53:47,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:47,024 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-06-12 21:53:47,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:47,024 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-06-12 21:53:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:53:47,025 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:47,025 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:47,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:47,243 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:47,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:47,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-06-12 21:53:47,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:47,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637337831] [2021-06-12 21:53:47,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:53:47,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:47,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637337831] [2021-06-12 21:53:47,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637337831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:47,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520341245] [2021-06-12 21:53:47,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:47,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:53:47,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:47,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:53:47,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:48,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:48,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-12 21:53:48,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:48,070 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-12 21:53:48,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:48,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-12 21:53:48,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:48,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:48,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:48,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:48,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:48,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:48,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:48,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:48,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:48,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:48,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-12 21:53:48,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:48,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:48,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:48,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:48,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:48,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:48,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:48,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:48,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:48,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-12 21:53:48,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:48,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:48,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:48,387 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-06-12 21:53:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:48,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520341245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:48,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:48,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-12 21:53:48,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329443080] [2021-06-12 21:53:48,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 21:53:48,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:48,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 21:53:48,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:53:48,401 INFO L87 Difference]: Start difference. First operand 737 states and 1581 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:50,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:50,372 INFO L93 Difference]: Finished difference Result 2302 states and 4879 transitions. [2021-06-12 21:53:50,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 21:53:50,373 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 21:53:50,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:50,378 INFO L225 Difference]: With dead ends: 2302 [2021-06-12 21:53:50,378 INFO L226 Difference]: Without dead ends: 2145 [2021-06-12 21:53:50,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1533.4ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 21:53:50,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-06-12 21:53:50,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-06-12 21:53:50,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.138335287221571) internal successors, (1824), 853 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:50,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-06-12 21:53:50,397 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-06-12 21:53:50,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:50,397 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-06-12 21:53:50,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:50,397 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-06-12 21:53:50,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:53:50,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:50,399 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:50,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 21:53:50,615 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:50,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:50,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-06-12 21:53:50,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:50,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249717458] [2021-06-12 21:53:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:50,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:50,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249717458] [2021-06-12 21:53:50,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249717458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:50,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796656365] [2021-06-12 21:53:50,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:50,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:53:50,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:50,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 21:53:50,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:51,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:51,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-06-12 21:53:51,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:51,415 INFO L628 ElimStorePlain]: treesize reduction 43, result has 58.7 percent of original size [2021-06-12 21:53:51,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:51,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:29 [2021-06-12 21:53:51,474 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:53:51,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 21:53:51,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:51,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:51,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:51,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-06-12 21:53:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:51,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796656365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:51,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:51,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-12 21:53:51,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431819678] [2021-06-12 21:53:51,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 21:53:51,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:51,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 21:53:51,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:53:51,496 INFO L87 Difference]: Start difference. First operand 854 states and 1824 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:53,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:53,438 INFO L93 Difference]: Finished difference Result 2428 states and 5151 transitions. [2021-06-12 21:53:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:53:53,439 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 21:53:53,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:53,444 INFO L225 Difference]: With dead ends: 2428 [2021-06-12 21:53:53,444 INFO L226 Difference]: Without dead ends: 2232 [2021-06-12 21:53:53,445 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1445.5ms TimeCoverageRelationStatistics Valid=593, Invalid=4519, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 21:53:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-06-12 21:53:53,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 956. [2021-06-12 21:53:53,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.1382198952879583) internal successors, (2042), 955 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:53,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2042 transitions. [2021-06-12 21:53:53,462 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2042 transitions. Word has length 41 [2021-06-12 21:53:53,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:53,462 INFO L482 AbstractCegarLoop]: Abstraction has 956 states and 2042 transitions. [2021-06-12 21:53:53,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:53,463 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2042 transitions. [2021-06-12 21:53:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:53:53,464 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:53,464 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:53,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 21:53:53,677 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:53,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:53,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-06-12 21:53:53,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:53,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627827451] [2021-06-12 21:53:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:53:53,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:53,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627827451] [2021-06-12 21:53:53,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627827451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:53,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162478257] [2021-06-12 21:53:53,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:53,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:53:53,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:53,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 21:53:53,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:54,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:54,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 77 [2021-06-12 21:53:54,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:54,711 INFO L628 ElimStorePlain]: treesize reduction 197, result has 27.3 percent of original size [2021-06-12 21:53:54,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:54,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:53, output treesize:47 [2021-06-12 21:53:55,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:55,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:55,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 63 [2021-06-12 21:53:55,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:53:55,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:55,362 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-06-12 21:53:55,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 1 [2021-06-12 21:53:55,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:55,381 INFO L628 ElimStorePlain]: treesize reduction 21, result has 54.3 percent of original size [2021-06-12 21:53:55,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:55,384 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:88, output treesize:21 [2021-06-12 21:53:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:55,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162478257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:55,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:55,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-06-12 21:53:55,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151548901] [2021-06-12 21:53:55,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-12 21:53:55,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:55,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-12 21:53:55,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1354, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:53:55,447 INFO L87 Difference]: Start difference. First operand 956 states and 2042 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:57,373 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-06-12 21:53:58,890 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-12 21:54:01,730 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-12 21:54:06,396 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-12 21:54:09,615 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-12 21:54:09,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:09,994 INFO L93 Difference]: Finished difference Result 4013 states and 8575 transitions. [2021-06-12 21:54:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-06-12 21:54:09,994 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 21:54:09,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:10,003 INFO L225 Difference]: With dead ends: 4013 [2021-06-12 21:54:10,004 INFO L226 Difference]: Without dead ends: 3813 [2021-06-12 21:54:10,008 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11305 ImplicationChecksByTransitivity, 11328.9ms TimeCoverageRelationStatistics Valid=3722, Invalid=26380, Unknown=0, NotChecked=0, Total=30102 [2021-06-12 21:54:10,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-06-12 21:54:10,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1122. [2021-06-12 21:54:10,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.145405887600357) internal successors, (2405), 1121 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2405 transitions. [2021-06-12 21:54:10,038 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2405 transitions. Word has length 41 [2021-06-12 21:54:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:10,038 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 2405 transitions. [2021-06-12 21:54:10,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:10,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2405 transitions. [2021-06-12 21:54:10,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:54:10,039 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:10,040 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:10,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:10,253 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:10,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:10,253 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-06-12 21:54:10,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:10,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382256525] [2021-06-12 21:54:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:54:10,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:10,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382256525] [2021-06-12 21:54:10,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382256525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:10,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899614035] [2021-06-12 21:54:10,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:10,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:54:10,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:11,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:11,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-12 21:54:11,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:11,158 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-06-12 21:54:11,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:11,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-06-12 21:54:11,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:11,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:11,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:11,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:11,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:11,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:11,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:11,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-12 21:54:11,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:11,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:11,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:11,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-12 21:54:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:11,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899614035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:11,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:11,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-12 21:54:11,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664300569] [2021-06-12 21:54:11,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 21:54:11,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:11,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 21:54:11,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:54:11,255 INFO L87 Difference]: Start difference. First operand 1122 states and 2405 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:13,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:13,375 INFO L93 Difference]: Finished difference Result 4028 states and 8625 transitions. [2021-06-12 21:54:13,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:54:13,375 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 21:54:13,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:13,388 INFO L225 Difference]: With dead ends: 4028 [2021-06-12 21:54:13,388 INFO L226 Difference]: Without dead ends: 3805 [2021-06-12 21:54:13,388 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1400.5ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 21:54:13,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-06-12 21:54:13,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 1424. [2021-06-12 21:54:13,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.1377371749824317) internal successors, (3042), 1423 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3042 transitions. [2021-06-12 21:54:13,441 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3042 transitions. Word has length 41 [2021-06-12 21:54:13,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:13,441 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 3042 transitions. [2021-06-12 21:54:13,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:13,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3042 transitions. [2021-06-12 21:54:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:54:13,443 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:13,443 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:13,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 21:54:13,680 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:13,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:13,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-06-12 21:54:13,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:13,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966710125] [2021-06-12 21:54:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:14,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:14,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966710125] [2021-06-12 21:54:14,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966710125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:14,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843830878] [2021-06-12 21:54:14,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:14,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:54:14,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:14,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:54:14,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:14,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:14,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-12 21:54:14,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:14,867 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-12 21:54:14,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:14,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-12 21:54:15,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:15,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:15,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:15,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:15,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:15,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:15,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:15,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:15,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-12 21:54:15,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:15,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:15,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:15,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-12 21:54:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:15,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843830878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:15,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:15,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-12 21:54:15,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815676750] [2021-06-12 21:54:15,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 21:54:15,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:15,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 21:54:15,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:54:15,115 INFO L87 Difference]: Start difference. First operand 1424 states and 3042 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:17,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:17,468 INFO L93 Difference]: Finished difference Result 4414 states and 9437 transitions. [2021-06-12 21:54:17,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:54:17,469 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 21:54:17,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:17,476 INFO L225 Difference]: With dead ends: 4414 [2021-06-12 21:54:17,485 INFO L226 Difference]: Without dead ends: 4155 [2021-06-12 21:54:17,485 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1936.9ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 21:54:17,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-12 21:54:17,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 1776. [2021-06-12 21:54:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.150985915492958) internal successors, (3818), 1775 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:17,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 3818 transitions. [2021-06-12 21:54:17,553 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 3818 transitions. Word has length 41 [2021-06-12 21:54:17,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:17,554 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 3818 transitions. [2021-06-12 21:54:17,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:17,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 3818 transitions. [2021-06-12 21:54:17,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:54:17,556 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:17,556 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:17,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:17,788 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:17,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:17,789 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-06-12 21:54:17,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:17,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086414516] [2021-06-12 21:54:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:18,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:18,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086414516] [2021-06-12 21:54:18,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086414516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:18,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936783891] [2021-06-12 21:54:18,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:18,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:54:18,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:18,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 21:54:18,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:18,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:18,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-06-12 21:54:18,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:18,600 INFO L628 ElimStorePlain]: treesize reduction 43, result has 60.2 percent of original size [2021-06-12 21:54:18,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:18,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:37 [2021-06-12 21:54:18,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:18,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:18,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:18,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:18,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:18,947 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-06-12 21:54:18,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-06-12 21:54:18,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:18,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:18,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:18,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:18,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:18,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:18,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:18,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 63 [2021-06-12 21:54:19,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 21:54:19,081 INFO L628 ElimStorePlain]: treesize reduction 43, result has 64.2 percent of original size [2021-06-12 21:54:19,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:54:19,093 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-06-12 21:54:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:19,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936783891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:19,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:19,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-06-12 21:54:19,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369246465] [2021-06-12 21:54:19,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-12 21:54:19,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:19,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-12 21:54:19,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:54:19,180 INFO L87 Difference]: Start difference. First operand 1776 states and 3818 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:22,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:22,023 INFO L93 Difference]: Finished difference Result 3956 states and 8497 transitions. [2021-06-12 21:54:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:54:22,023 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 21:54:22,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:22,034 INFO L225 Difference]: With dead ends: 3956 [2021-06-12 21:54:22,035 INFO L226 Difference]: Without dead ends: 3795 [2021-06-12 21:54:22,035 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2371.7ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 21:54:22,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-06-12 21:54:22,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 1886. [2021-06-12 21:54:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 2.1527851458885943) internal successors, (4058), 1885 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:22,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 4058 transitions. [2021-06-12 21:54:22,092 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 4058 transitions. Word has length 41 [2021-06-12 21:54:22,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:22,092 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 4058 transitions. [2021-06-12 21:54:22,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:22,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 4058 transitions. [2021-06-12 21:54:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 21:54:22,095 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:22,095 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:22,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 21:54:22,313 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:22,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:22,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-06-12 21:54:22,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:22,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380529220] [2021-06-12 21:54:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:22,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:22,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380529220] [2021-06-12 21:54:22,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380529220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:22,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419063612] [2021-06-12 21:54:22,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:22,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:54:22,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:22,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 21:54:22,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:22,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419063612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:22,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:22,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-06-12 21:54:22,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51165166] [2021-06-12 21:54:22,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:54:22,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:22,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:54:22,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:54:22,459 INFO L87 Difference]: Start difference. First operand 1886 states and 4058 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:22,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:22,529 INFO L93 Difference]: Finished difference Result 2387 states and 5133 transitions. [2021-06-12 21:54:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:54:22,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-12 21:54:22,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:22,536 INFO L225 Difference]: With dead ends: 2387 [2021-06-12 21:54:22,537 INFO L226 Difference]: Without dead ends: 2337 [2021-06-12 21:54:22,537 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:54:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-06-12 21:54:22,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2028. [2021-06-12 21:54:22,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.163295510606808) internal successors, (4385), 2027 states have internal predecessors, (4385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:22,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 4385 transitions. [2021-06-12 21:54:22,559 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 4385 transitions. Word has length 45 [2021-06-12 21:54:22,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:22,560 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 4385 transitions. [2021-06-12 21:54:22,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:22,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 4385 transitions. [2021-06-12 21:54:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 21:54:22,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:22,562 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:22,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-12 21:54:22,777 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:22,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:22,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-06-12 21:54:22,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:22,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666884847] [2021-06-12 21:54:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-12 21:54:22,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:22,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666884847] [2021-06-12 21:54:22,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666884847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:22,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131984144] [2021-06-12 21:54:22,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:22,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:54:22,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:22,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:54:22,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 21:54:22,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131984144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:22,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:22,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 21:54:22,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93241301] [2021-06-12 21:54:22,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 21:54:22,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:22,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 21:54:22,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:54:22,900 INFO L87 Difference]: Start difference. First operand 2028 states and 4385 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:22,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:22,921 INFO L93 Difference]: Finished difference Result 2477 states and 5328 transitions. [2021-06-12 21:54:22,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 21:54:22,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-12 21:54:22,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:22,932 INFO L225 Difference]: With dead ends: 2477 [2021-06-12 21:54:22,932 INFO L226 Difference]: Without dead ends: 2477 [2021-06-12 21:54:22,933 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:54:22,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2021-06-12 21:54:22,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 1590. [2021-06-12 21:54:22,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 2.1648835745752044) internal successors, (3440), 1589 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:22,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 3440 transitions. [2021-06-12 21:54:22,954 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 3440 transitions. Word has length 46 [2021-06-12 21:54:22,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:22,954 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 3440 transitions. [2021-06-12 21:54:22,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:22,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 3440 transitions. [2021-06-12 21:54:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 21:54:22,956 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:22,956 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:23,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-12 21:54:23,173 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:23,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:23,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-06-12 21:54:23,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:23,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317819072] [2021-06-12 21:54:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 21:54:23,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:23,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317819072] [2021-06-12 21:54:23,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317819072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:23,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513563224] [2021-06-12 21:54:23,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:23,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:54:23,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:23,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:54:23,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 21:54:23,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513563224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:23,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:23,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 21:54:23,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214051283] [2021-06-12 21:54:23,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 21:54:23,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:23,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 21:54:23,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:54:23,281 INFO L87 Difference]: Start difference. First operand 1590 states and 3440 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:23,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:23,304 INFO L93 Difference]: Finished difference Result 1749 states and 3746 transitions. [2021-06-12 21:54:23,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:54:23,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-12 21:54:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:23,309 INFO L225 Difference]: With dead ends: 1749 [2021-06-12 21:54:23,309 INFO L226 Difference]: Without dead ends: 1749 [2021-06-12 21:54:23,309 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:54:23,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2021-06-12 21:54:23,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1386. [2021-06-12 21:54:23,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 2.1494584837545125) internal successors, (2977), 1385 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:23,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2977 transitions. [2021-06-12 21:54:23,332 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2977 transitions. Word has length 46 [2021-06-12 21:54:23,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:23,332 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 2977 transitions. [2021-06-12 21:54:23,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:23,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2977 transitions. [2021-06-12 21:54:23,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 21:54:23,334 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:23,334 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:23,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-12 21:54:23,550 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:23,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:23,550 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-06-12 21:54:23,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:23,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59808700] [2021-06-12 21:54:23,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:24,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:24,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59808700] [2021-06-12 21:54:24,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59808700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:24,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535825527] [2021-06-12 21:54:24,036 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 [2021-06-12 21:54:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:24,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 21:54:24,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:24,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:24,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2021-06-12 21:54:24,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:24,603 INFO L628 ElimStorePlain]: treesize reduction 69, result has 66.8 percent of original size [2021-06-12 21:54:24,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:24,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:72 [2021-06-12 21:54:25,002 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-12 21:54:25,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2021-06-12 21:54:25,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:25,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:25,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:25,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-06-12 21:54:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:25,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535825527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:25,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:25,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-06-12 21:54:25,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498196419] [2021-06-12 21:54:25,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-12 21:54:25,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:25,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-12 21:54:25,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:54:25,014 INFO L87 Difference]: Start difference. First operand 1386 states and 2977 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:28,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:28,281 INFO L93 Difference]: Finished difference Result 2993 states and 6367 transitions. [2021-06-12 21:54:28,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 21:54:28,281 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-12 21:54:28,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:28,285 INFO L225 Difference]: With dead ends: 2993 [2021-06-12 21:54:28,285 INFO L226 Difference]: Without dead ends: 2897 [2021-06-12 21:54:28,286 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 2285.9ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 21:54:28,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-06-12 21:54:28,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 1478. [2021-06-12 21:54:28,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 2.159106296547055) internal successors, (3189), 1477 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 3189 transitions. [2021-06-12 21:54:28,304 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 3189 transitions. Word has length 50 [2021-06-12 21:54:28,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:28,304 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 3189 transitions. [2021-06-12 21:54:28,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 3189 transitions. [2021-06-12 21:54:28,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 21:54:28,305 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:28,305 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:28,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:28,521 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:28,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:28,521 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-06-12 21:54:28,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:28,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779896582] [2021-06-12 21:54:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:54:28,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:28,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779896582] [2021-06-12 21:54:28,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779896582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:28,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467665393] [2021-06-12 21:54:28,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:28,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:54:28,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:28,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 21:54:28,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:29,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:29,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2021-06-12 21:54:29,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:30,035 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.5 percent of original size [2021-06-12 21:54:30,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:30,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:76 [2021-06-12 21:54:30,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:30,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:30,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:30,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:30,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-12 21:54:30,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:30,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:30,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:30,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:30,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2021-06-12 21:54:30,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:30,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:30,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:30,476 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:5 [2021-06-12 21:54:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:30,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467665393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:30,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:30,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-06-12 21:54:30,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109869506] [2021-06-12 21:54:30,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-12 21:54:30,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:30,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-12 21:54:30,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:54:30,485 INFO L87 Difference]: Start difference. First operand 1478 states and 3189 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:35,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:35,414 INFO L93 Difference]: Finished difference Result 3235 states and 6875 transitions. [2021-06-12 21:54:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 21:54:35,415 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-12 21:54:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:35,417 INFO L225 Difference]: With dead ends: 3235 [2021-06-12 21:54:35,417 INFO L226 Difference]: Without dead ends: 3122 [2021-06-12 21:54:35,419 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 3841.8ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-06-12 21:54:35,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2021-06-12 21:54:35,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 1551. [2021-06-12 21:54:35,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 2.1580645161290324) internal successors, (3345), 1550 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3345 transitions. [2021-06-12 21:54:35,438 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3345 transitions. Word has length 50 [2021-06-12 21:54:35,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:35,439 INFO L482 AbstractCegarLoop]: Abstraction has 1551 states and 3345 transitions. [2021-06-12 21:54:35,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3345 transitions. [2021-06-12 21:54:35,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 21:54:35,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:35,447 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:35,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-12 21:54:35,649 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:35,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:35,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-06-12 21:54:35,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:35,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377309427] [2021-06-12 21:54:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:36,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:36,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377309427] [2021-06-12 21:54:36,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377309427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:36,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173025477] [2021-06-12 21:54:36,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:36,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:54:36,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:36,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 21:54:36,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:38,140 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-12 21:54:38,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:38,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-12 21:54:38,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:38,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:38,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-12 21:54:38,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:38,461 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 98 [2021-06-12 21:54:38,461 INFO L628 ElimStorePlain]: treesize reduction 149, result has 64.4 percent of original size [2021-06-12 21:54:38,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2021-06-12 21:54:38,529 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:133 [2021-06-12 21:54:46,600 WARN L205 SmtUtils]: Spent 4.49 s on a formula simplification that was a NOOP. DAG size: 63 [2021-06-12 21:55:09,117 WARN L205 SmtUtils]: Spent 13.03 s on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-12 21:55:09,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:09,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:09,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:09,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:09,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:09,390 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-06-12 21:55:09,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 45 treesize of output 115 [2021-06-12 21:55:09,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:09,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:09,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:09,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:09,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:09,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 38 treesize of output 128 [2021-06-12 21:55:10,335 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-06-12 21:55:10,451 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-06-12 21:55:10,586 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 277 [2021-06-12 21:55:11,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 21:55:11,382 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 72 [2021-06-12 21:55:11,383 INFO L628 ElimStorePlain]: treesize reduction 656, result has 19.0 percent of original size [2021-06-12 21:55:11,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 21:55:11,413 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:37 [2021-06-12 21:55:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:11,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173025477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:11,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:11,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-06-12 21:55:11,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638586036] [2021-06-12 21:55:11,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-12 21:55:11,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:11,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-12 21:55:11,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2270, Unknown=1, NotChecked=0, Total=2550 [2021-06-12 21:55:11,514 INFO L87 Difference]: Start difference. First operand 1551 states and 3345 transitions. Second operand has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:28,247 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 40 [2021-06-12 21:55:37,787 WARN L205 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 138 DAG size of output: 42 [2021-06-12 21:56:00,520 WARN L205 SmtUtils]: Spent 11.75 s on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-06-12 21:56:13,094 WARN L205 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-06-12 21:56:21,686 WARN L205 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-06-12 21:56:28,932 WARN L205 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 130 DAG size of output: 51 [2021-06-12 21:56:46,931 WARN L205 SmtUtils]: Spent 12.74 s on a formula simplification. DAG size of input: 122 DAG size of output: 70 [2021-06-12 21:56:52,955 WARN L205 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 120 DAG size of output: 46 [2021-06-12 21:57:05,454 WARN L205 SmtUtils]: Spent 8.47 s on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-06-12 21:57:17,831 WARN L205 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2021-06-12 21:57:24,718 WARN L205 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 118 DAG size of output: 47 [2021-06-12 21:57:38,085 WARN L205 SmtUtils]: Spent 12.29 s on a formula simplification. DAG size of input: 122 DAG size of output: 48 [2021-06-12 21:58:03,250 WARN L205 SmtUtils]: Spent 15.49 s on a formula simplification. DAG size of input: 123 DAG size of output: 52 [2021-06-12 21:58:13,515 WARN L205 SmtUtils]: Spent 5.46 s on a formula simplification. DAG size of input: 117 DAG size of output: 49 [2021-06-12 21:58:21,893 WARN L205 SmtUtils]: Spent 5.15 s on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-06-12 21:58:30,962 WARN L205 SmtUtils]: Spent 3.98 s on a formula simplification. DAG size of input: 119 DAG size of output: 46 [2021-06-12 21:58:40,734 WARN L205 SmtUtils]: Spent 4.45 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-06-12 21:58:49,718 WARN L205 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 102 DAG size of output: 68 [2021-06-12 21:59:14,223 WARN L205 SmtUtils]: Spent 15.24 s on a formula simplification. DAG size of input: 121 DAG size of output: 72 [2021-06-12 21:59:32,994 WARN L205 SmtUtils]: Spent 13.92 s on a formula simplification. DAG size of input: 127 DAG size of output: 75 [2021-06-12 21:59:48,642 WARN L205 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 123 DAG size of output: 69 [2021-06-12 21:59:58,864 WARN L205 SmtUtils]: Spent 4.83 s on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2021-06-12 22:00:21,118 WARN L205 SmtUtils]: Spent 14.35 s on a formula simplification. DAG size of input: 137 DAG size of output: 52 [2021-06-12 22:00:30,595 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 55 [2021-06-12 22:00:52,743 WARN L205 SmtUtils]: Spent 12.59 s on a formula simplification. DAG size of input: 125 DAG size of output: 57 [2021-06-12 22:01:16,533 WARN L205 SmtUtils]: Spent 11.96 s on a formula simplification. DAG size of input: 97 DAG size of output: 64 [2021-06-12 22:01:31,745 WARN L205 SmtUtils]: Spent 14.56 s on a formula simplification. DAG size of input: 142 DAG size of output: 59 [2021-06-12 22:01:56,679 WARN L205 SmtUtils]: Spent 15.78 s on a formula simplification. DAG size of input: 126 DAG size of output: 75 [2021-06-12 22:02:17,927 WARN L205 SmtUtils]: Spent 13.11 s on a formula simplification. DAG size of input: 115 DAG size of output: 68 [2021-06-12 22:02:42,086 WARN L205 SmtUtils]: Spent 12.82 s on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2021-06-12 22:02:53,977 WARN L205 SmtUtils]: Spent 6.65 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-06-12 22:03:06,894 WARN L205 SmtUtils]: Spent 8.46 s on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-06-12 22:03:35,476 WARN L205 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 136 DAG size of output: 52 [2021-06-12 22:04:04,659 WARN L205 SmtUtils]: Spent 13.42 s on a formula simplification. DAG size of input: 113 DAG size of output: 64 [2021-06-12 22:04:19,435 WARN L205 SmtUtils]: Spent 7.34 s on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-06-12 22:04:26,991 WARN L205 SmtUtils]: Spent 2.80 s on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-12 22:04:39,905 WARN L205 SmtUtils]: Spent 7.70 s on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-06-12 22:05:21,693 WARN L205 SmtUtils]: Spent 3.49 s on a formula simplification. DAG size of input: 141 DAG size of output: 59 [2021-06-12 22:05:43,551 WARN L205 SmtUtils]: Spent 12.71 s on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2021-06-12 22:05:55,888 WARN L205 SmtUtils]: Spent 4.83 s on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-06-12 22:06:05,705 WARN L205 SmtUtils]: Spent 4.58 s on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2021-06-12 22:06:26,398 WARN L205 SmtUtils]: Spent 4.90 s on a formula simplification. DAG size of input: 116 DAG size of output: 64 [2021-06-12 22:07:00,923 WARN L205 SmtUtils]: Spent 13.38 s on a formula simplification. DAG size of input: 101 DAG size of output: 66 [2021-06-12 22:07:29,180 WARN L205 SmtUtils]: Spent 13.15 s on a formula simplification. DAG size of input: 113 DAG size of output: 71 [2021-06-12 22:07:57,778 WARN L205 SmtUtils]: Spent 3.47 s on a formula simplification. DAG size of input: 118 DAG size of output: 66 Received shutdown request... [2021-06-12 22:08:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-06-12 22:08:12,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:12,738 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 22:08:12,740 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 22:08:12,741 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 22:08:12,741 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 10:08:12 BasicIcfg [2021-06-12 22:08:12,741 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 22:08:12,741 INFO L168 Benchmark]: Toolchain (without parser) took 880387.40 ms. Allocated memory was 196.1 MB in the beginning and 343.9 MB in the end (delta: 147.8 MB). Free memory was 174.9 MB in the beginning and 155.3 MB in the end (delta: 19.6 MB). Peak memory consumption was 169.0 MB. Max. memory is 8.0 GB. [2021-06-12 22:08:12,742 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 196.1 MB. Free memory is still 176.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 22:08:12,742 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.42 ms. Allocated memory is still 196.1 MB. Free memory was 174.8 MB in the beginning and 173.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 22:08:12,742 INFO L168 Benchmark]: Boogie Preprocessor took 13.34 ms. Allocated memory is still 196.1 MB. Free memory was 173.4 MB in the beginning and 172.4 MB in the end (delta: 997.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 22:08:12,742 INFO L168 Benchmark]: RCFGBuilder took 272.85 ms. Allocated memory is still 196.1 MB. Free memory was 172.4 MB in the beginning and 159.4 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-06-12 22:08:12,742 INFO L168 Benchmark]: TraceAbstraction took 880077.96 ms. Allocated memory was 196.1 MB in the beginning and 343.9 MB in the end (delta: 147.8 MB). Free memory was 159.0 MB in the beginning and 155.3 MB in the end (delta: 3.7 MB). Peak memory consumption was 153.3 MB. Max. memory is 8.0 GB. [2021-06-12 22:08:12,742 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 196.1 MB. Free memory is still 176.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.42 ms. Allocated memory is still 196.1 MB. Free memory was 174.8 MB in the beginning and 173.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.34 ms. Allocated memory is still 196.1 MB. Free memory was 173.4 MB in the beginning and 172.4 MB in the end (delta: 997.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 272.85 ms. Allocated memory is still 196.1 MB. Free memory was 172.4 MB in the beginning and 159.4 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 880077.96 ms. Allocated memory was 196.1 MB in the beginning and 343.9 MB in the end (delta: 147.8 MB). Free memory was 159.0 MB in the beginning and 155.3 MB in the end (delta: 3.7 MB). Peak memory consumption was 153.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1551states) and FLOYD_HOARE automaton (currently 113 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 151 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 879970.5ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 45.1ms, AutomataDifference: 822588.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1083 SDtfs, 5046 SDslu, 11539 SDs, 0 SdLazy, 28956 SolverSat, 3269 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 79134.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1845 GetRequests, 588 SyntacticMatches, 38 SemanticMatches, 1218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40977 ImplicationChecksByTransitivity, 771621.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2028occurred in iteration=18, InterpolantAutomatonStates: 787, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 500.5ms AutomataMinimizationTime, 22 MinimizatonAttempts, 20540 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 131.0ms SsaConstructionTime, 355.4ms SatisfiabilityAnalysisTime, 51227.3ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 268 QuantifiedInterpolants, 27388 SizeOfPredicates, 223 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 544 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 260/1315 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