/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 23:42:35,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 23:42:35,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 23:42:35,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 23:42:35,385 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 23:42:35,411 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 23:42:35,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 23:42:35,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 23:42:35,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 23:42:35,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 23:42:35,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 23:42:35,414 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 23:42:35,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 23:42:35,415 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 23:42:35,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 23:42:35,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 23:42:35,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 23:42:35,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 23:42:35,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 23:42:35,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 23:42:35,416 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 23:42:35,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 23:42:35,416 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 23:42:35,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 23:42:35,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 23:42:35,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 23:42:35,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 23:42:35,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 23:42:35,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 23:42:35,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 23:42:35,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 23:42:35,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 23:42:35,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 23:42:35,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 23:42:35,418 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 23:42:35,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 23:42:35,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 23:42:35,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 23:42:35,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 23:42:35,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 23:42:35,671 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 23:42:35,672 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 23:42:35,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl [2021-03-10 23:42:35,673 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl' [2021-03-10 23:42:35,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 23:42:35,714 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 23:42:35,715 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 23:42:35,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 23:42:35,716 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 23:42:35,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:42:35" (1/1) ... [2021-03-10 23:42:35,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:42:35" (1/1) ... [2021-03-10 23:42:35,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 23:42:35,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 23:42:35,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 23:42:35,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 23:42:35,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:42:35" (1/1) ... [2021-03-10 23:42:35,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:42:35" (1/1) ... [2021-03-10 23:42:35,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:42:35" (1/1) ... [2021-03-10 23:42:35,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:42:35" (1/1) ... [2021-03-10 23:42:35,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:42:35" (1/1) ... [2021-03-10 23:42:35,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:42:35" (1/1) ... [2021-03-10 23:42:35,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:42:35" (1/1) ... [2021-03-10 23:42:35,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 23:42:35,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 23:42:35,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 23:42:35,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 23:42:35,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:42:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 23:42:35,817 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 23:42:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 23:42:35,818 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 23:42:35,818 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 23:42:35,818 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 23:42:35,818 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 23:42:35,818 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 23:42:35,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 23:42:35,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 23:42:35,819 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 23:42:35,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 23:42:35,997 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 23:42:35,998 INFO L202 PluginConnector]: Adding new model dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:42:35 BoogieIcfgContainer [2021-03-10 23:42:35,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 23:42:35,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 23:42:35,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 23:42:36,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 23:42:36,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:42:35" (1/2) ... [2021-03-10 23:42:36,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@665754e and model type dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 11:42:36, skipping insertion in model container [2021-03-10 23:42:36,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:42:35" (2/2) ... [2021-03-10 23:42:36,003 INFO L111 eAbstractionObserver]: Analyzing ICFG dec-subseq-array.wvr.bpl [2021-03-10 23:42:36,006 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 23:42:36,006 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 23:42:36,008 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 23:42:36,009 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 23:42:36,071 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 23:42:36,096 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 23:42:36,123 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 23:42:36,123 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 23:42:36,123 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 23:42:36,123 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 23:42:36,123 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 23:42:36,123 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 23:42:36,123 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 23:42:36,124 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 23:42:36,129 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-03-10 23:42:36,137 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) [2021-03-10 23:42:36,139 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) [2021-03-10 23:42:36,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 23:42:36,143 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:36,143 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:36,143 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:36,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:36,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-03-10 23:42:36,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:36,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198112273] [2021-03-10 23:42:36,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:36,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198112273] [2021-03-10 23:42:36,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:42:36,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:42:36,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174585606] [2021-03-10 23:42:36,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:42:36,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:36,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:42:36,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:42:36,264 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) [2021-03-10 23:42:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:36,289 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-03-10 23:42:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:42:36,290 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 [2021-03-10 23:42:36,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:36,299 INFO L225 Difference]: With dead ends: 104 [2021-03-10 23:42:36,299 INFO L226 Difference]: Without dead ends: 87 [2021-03-10 23:42:36,300 INFO L775 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 [2021-03-10 23:42:36,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-03-10 23:42:36,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-03-10 23:42:36,332 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) [2021-03-10 23:42:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-03-10 23:42:36,335 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-03-10 23:42:36,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:36,335 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-03-10 23:42:36,335 INFO L481 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) [2021-03-10 23:42:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-03-10 23:42:36,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:42:36,336 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:36,337 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:36,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 23:42:36,337 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:36,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:36,340 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-03-10 23:42:36,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:36,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710805972] [2021-03-10 23:42:36,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:36,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710805972] [2021-03-10 23:42:36,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:42:36,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:42:36,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469768083] [2021-03-10 23:42:36,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:42:36,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:36,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:42:36,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:42:36,414 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) [2021-03-10 23:42:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:36,447 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-03-10 23:42:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:42:36,448 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 [2021-03-10 23:42:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:36,451 INFO L225 Difference]: With dead ends: 91 [2021-03-10 23:42:36,451 INFO L226 Difference]: Without dead ends: 83 [2021-03-10 23:42:36,452 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:42:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-03-10 23:42:36,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-03-10 23:42:36,458 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) [2021-03-10 23:42:36,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-03-10 23:42:36,461 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-03-10 23:42:36,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:36,461 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-03-10 23:42:36,461 INFO L481 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) [2021-03-10 23:42:36,462 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-03-10 23:42:36,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 23:42:36,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:36,462 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:36,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 23:42:36,463 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:36,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-03-10 23:42:36,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:36,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542735211] [2021-03-10 23:42:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:36,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542735211] [2021-03-10 23:42:36,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42275503] [2021-03-10 23:42:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:36,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:42:36,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:36,751 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 [2021-03-10 23:42:36,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:36,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:36,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:36,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-03-10 23:42:36,792 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 [2021-03-10 23:42:36,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:36,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:36,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:36,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-03-10 23:42:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:36,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:36,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-03-10 23:42:36,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680346765] [2021-03-10 23:42:36,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:42:36,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:36,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:42:36,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:42:36,809 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) [2021-03-10 23:42:36,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:36,892 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-03-10 23:42:36,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:42:36,896 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 [2021-03-10 23:42:36,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:36,897 INFO L225 Difference]: With dead ends: 154 [2021-03-10 23:42:36,897 INFO L226 Difference]: Without dead ends: 137 [2021-03-10 23:42:36,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:42:36,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-03-10 23:42:36,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-03-10 23:42:36,906 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) [2021-03-10 23:42:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-03-10 23:42:36,907 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-03-10 23:42:36,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:36,907 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-03-10 23:42:36,907 INFO L481 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) [2021-03-10 23:42:36,907 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-03-10 23:42:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:42:36,908 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:36,908 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:37,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-10 23:42:37,120 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:37,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:37,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-03-10 23:42:37,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:37,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790705642] [2021-03-10 23:42:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:37,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790705642] [2021-03-10 23:42:37,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407570963] [2021-03-10 23:42:37,174 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) [2021-03-10 23:42:37,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:42:37,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:37,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 23:42:37,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:37,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:37,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-03-10 23:42:37,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77999629] [2021-03-10 23:42:37,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:42:37,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:37,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:42:37,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:42:37,248 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) [2021-03-10 23:42:37,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:37,325 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-03-10 23:42:37,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:42:37,326 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 [2021-03-10 23:42:37,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:37,331 INFO L225 Difference]: With dead ends: 284 [2021-03-10 23:42:37,331 INFO L226 Difference]: Without dead ends: 264 [2021-03-10 23:42:37,331 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:42:37,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-03-10 23:42:37,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-03-10 23:42:37,340 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) [2021-03-10 23:42:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-03-10 23:42:37,341 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-03-10 23:42:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:37,341 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-03-10 23:42:37,341 INFO L481 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) [2021-03-10 23:42:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-03-10 23:42:37,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:42:37,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:37,342 INFO L519 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] [2021-03-10 23:42:37,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:37,547 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:37,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:37,548 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-03-10 23:42:37,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:37,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236050843] [2021-03-10 23:42:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:37,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236050843] [2021-03-10 23:42:37,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582196980] [2021-03-10 23:42:37,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:37,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:42:37,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:37,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:42:37,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:38,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:38,016 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 [2021-03-10 23:42:38,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:38,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:38,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:38,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-03-10 23:42:38,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:38,206 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 [2021-03-10 23:42:38,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:42:38,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:38,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:38,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-03-10 23:42:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:38,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:38,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-03-10 23:42:38,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252605670] [2021-03-10 23:42:38,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:42:38,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:38,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:42:38,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:42:38,347 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) [2021-03-10 23:42:39,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:39,890 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-03-10 23:42:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:42:39,891 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 [2021-03-10 23:42:39,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:39,893 INFO L225 Difference]: With dead ends: 650 [2021-03-10 23:42:39,893 INFO L226 Difference]: Without dead ends: 573 [2021-03-10 23:42:39,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1284.0ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 23:42:39,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-03-10 23:42:39,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-03-10 23:42:39,907 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) [2021-03-10 23:42:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-03-10 23:42:39,908 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-03-10 23:42:39,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:39,908 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-03-10 23:42:39,908 INFO L481 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) [2021-03-10 23:42:39,908 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-03-10 23:42:39,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:42:39,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:39,909 INFO L519 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] [2021-03-10 23:42:40,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:40,115 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:40,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:40,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-03-10 23:42:40,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:40,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898317194] [2021-03-10 23:42:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:42:40,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898317194] [2021-03-10 23:42:40,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450480375] [2021-03-10 23:42:40,340 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 [2021-03-10 23:42:40,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:42:40,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:40,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 23:42:40,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:40,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:40,609 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 [2021-03-10 23:42:40,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:40,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:40,620 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. [2021-03-10 23:42:40,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-03-10 23:42:40,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:40,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:40,707 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 [2021-03-10 23:42:40,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:40,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:40,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:40,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-03-10 23:42:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:40,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:40,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-03-10 23:42:40,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609801077] [2021-03-10 23:42:40,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:42:40,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:40,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:42:40,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:42:40,727 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) [2021-03-10 23:42:41,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:41,370 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-03-10 23:42:41,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:42:41,370 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 [2021-03-10 23:42:41,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:41,373 INFO L225 Difference]: With dead ends: 1023 [2021-03-10 23:42:41,373 INFO L226 Difference]: Without dead ends: 878 [2021-03-10 23:42:41,374 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 537.1ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:42:41,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-03-10 23:42:41,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-03-10 23:42:41,384 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) [2021-03-10 23:42:41,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-03-10 23:42:41,385 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-03-10 23:42:41,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:41,386 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-03-10 23:42:41,386 INFO L481 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) [2021-03-10 23:42:41,386 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-03-10 23:42:41,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:42:41,388 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:41,388 INFO L519 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] [2021-03-10 23:42:41,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:41,595 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:41,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:41,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-03-10 23:42:41,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:41,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129972551] [2021-03-10 23:42:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:41,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129972551] [2021-03-10 23:42:41,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161672984] [2021-03-10 23:42:41,786 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 [2021-03-10 23:42:41,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:42:41,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:41,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 23:42:41,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:42,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:42,021 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 [2021-03-10 23:42:42,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:42,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:42,033 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. [2021-03-10 23:42:42,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-03-10 23:42:42,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:42,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:42,128 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 [2021-03-10 23:42:42,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:42,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:42,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:42,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-03-10 23:42:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:42,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:42,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-03-10 23:42:42,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670392350] [2021-03-10 23:42:42,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:42:42,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:42,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:42:42,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:42:42,148 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) [2021-03-10 23:42:42,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:42,838 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-03-10 23:42:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:42:42,839 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 [2021-03-10 23:42:42,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:42,843 INFO L225 Difference]: With dead ends: 1081 [2021-03-10 23:42:42,843 INFO L226 Difference]: Without dead ends: 927 [2021-03-10 23:42:42,844 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 550.9ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:42:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-03-10 23:42:42,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-03-10 23:42:42,854 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) [2021-03-10 23:42:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-03-10 23:42:42,857 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-03-10 23:42:42,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:42,858 INFO L480 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-03-10 23:42:42,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:42,858 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-03-10 23:42:42,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:42:42,858 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:42,859 INFO L519 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] [2021-03-10 23:42:43,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 23:42:43,073 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:43,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:43,073 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-03-10 23:42:43,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:43,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466388434] [2021-03-10 23:42:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:42:43,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466388434] [2021-03-10 23:42:43,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262091502] [2021-03-10 23:42:43,247 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 [2021-03-10 23:42:43,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:42:43,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:43,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 23:42:43,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:43,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:43,508 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 [2021-03-10 23:42:43,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:43,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:43,521 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. [2021-03-10 23:42:43,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-03-10 23:42:43,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:43,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:43,582 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 [2021-03-10 23:42:43,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:43,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:43,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:43,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-03-10 23:42:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:43,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:43,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-03-10 23:42:43,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238289228] [2021-03-10 23:42:43,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:42:43,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:43,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:42:43,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:42:43,604 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:44,087 INFO L93 Difference]: Finished difference Result 1039 states and 2202 transitions. [2021-03-10 23:42:44,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:42:44,087 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 23:42:44,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:44,090 INFO L225 Difference]: With dead ends: 1039 [2021-03-10 23:42:44,090 INFO L226 Difference]: Without dead ends: 929 [2021-03-10 23:42:44,090 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 439.3ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:42:44,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-03-10 23:42:44,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 487. [2021-03-10 23:42:44,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.1790123456790123) internal successors, (1059), 486 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:44,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1059 transitions. [2021-03-10 23:42:44,102 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1059 transitions. Word has length 32 [2021-03-10 23:42:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:44,102 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 1059 transitions. [2021-03-10 23:42:44,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:44,102 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1059 transitions. [2021-03-10 23:42:44,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:42:44,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:44,103 INFO L519 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] [2021-03-10 23:42:44,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:44,320 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:44,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:44,320 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-03-10 23:42:44,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:44,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55084120] [2021-03-10 23:42:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:44,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55084120] [2021-03-10 23:42:44,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351048731] [2021-03-10 23:42:44,490 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 [2021-03-10 23:42:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:44,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 23:42:44,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:44,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:44,710 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 [2021-03-10 23:42:44,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:44,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:44,721 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. [2021-03-10 23:42:44,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-03-10 23:42:44,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:44,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:44,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:44,806 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 [2021-03-10 23:42:44,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:44,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:44,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:44,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-03-10 23:42:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:44,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:44,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-03-10 23:42:44,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235669820] [2021-03-10 23:42:44,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:42:44,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:44,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:42:44,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:42:44,826 INFO L87 Difference]: Start difference. First operand 487 states and 1059 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:45,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:45,298 INFO L93 Difference]: Finished difference Result 1050 states and 2227 transitions. [2021-03-10 23:42:45,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:42:45,299 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 [2021-03-10 23:42:45,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:45,301 INFO L225 Difference]: With dead ends: 1050 [2021-03-10 23:42:45,301 INFO L226 Difference]: Without dead ends: 952 [2021-03-10 23:42:45,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 440.4ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:42:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-03-10 23:42:45,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 467. [2021-03-10 23:42:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.1609442060085837) internal successors, (1007), 466 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1007 transitions. [2021-03-10 23:42:45,311 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1007 transitions. Word has length 32 [2021-03-10 23:42:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:45,311 INFO L480 AbstractCegarLoop]: Abstraction has 467 states and 1007 transitions. [2021-03-10 23:42:45,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:45,311 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1007 transitions. [2021-03-10 23:42:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:42:45,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:45,313 INFO L519 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] [2021-03-10 23:42:45,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:45,521 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:45,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-03-10 23:42:45,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:45,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907617229] [2021-03-10 23:42:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:45,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907617229] [2021-03-10 23:42:45,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53293760] [2021-03-10 23:42:45,565 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 [2021-03-10 23:42:45,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:42:45,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:45,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:42:45,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:45,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:45,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-03-10 23:42:45,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862795670] [2021-03-10 23:42:45,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:42:45,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:45,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:42:45,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:42:45,649 INFO L87 Difference]: Start difference. First operand 467 states and 1007 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) [2021-03-10 23:42:45,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:45,707 INFO L93 Difference]: Finished difference Result 885 states and 1908 transitions. [2021-03-10 23:42:45,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:42:45,707 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 [2021-03-10 23:42:45,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:45,710 INFO L225 Difference]: With dead ends: 885 [2021-03-10 23:42:45,710 INFO L226 Difference]: Without dead ends: 847 [2021-03-10 23:42:45,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:42:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-03-10 23:42:45,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 716. [2021-03-10 23:42:45,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.1846153846153844) internal successors, (1562), 715 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1562 transitions. [2021-03-10 23:42:45,722 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1562 transitions. Word has length 36 [2021-03-10 23:42:45,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:45,722 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 1562 transitions. [2021-03-10 23:42:45,722 INFO L481 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) [2021-03-10 23:42:45,722 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1562 transitions. [2021-03-10 23:42:45,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 23:42:45,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:45,724 INFO L519 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] [2021-03-10 23:42:45,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 23:42:45,938 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:45,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:45,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-03-10 23:42:45,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:45,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290446561] [2021-03-10 23:42:45,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:46,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290446561] [2021-03-10 23:42:46,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36403544] [2021-03-10 23:42:46,285 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 [2021-03-10 23:42:46,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:42:46,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:46,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 23:42:46,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:46,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:46,588 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 [2021-03-10 23:42:46,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:46,630 INFO L628 ElimStorePlain]: treesize reduction 43, result has 60.2 percent of original size [2021-03-10 23:42:46,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:46,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:37 [2021-03-10 23:42:46,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:46,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:46,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:46,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:46,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:46,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:46,956 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 41 [2021-03-10 23:42:46,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:42:46,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:47,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:47,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:17 [2021-03-10 23:42:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:47,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:47,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-03-10 23:42:47,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286075602] [2021-03-10 23:42:47,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-03-10 23:42:47,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:47,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-03-10 23:42:47,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:42:47,082 INFO L87 Difference]: Start difference. First operand 716 states and 1562 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) [2021-03-10 23:42:51,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:51,645 INFO L93 Difference]: Finished difference Result 2858 states and 6129 transitions. [2021-03-10 23:42:51,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-03-10 23:42:51,645 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 [2021-03-10 23:42:51,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:51,652 INFO L225 Difference]: With dead ends: 2858 [2021-03-10 23:42:51,652 INFO L226 Difference]: Without dead ends: 2546 [2021-03-10 23:42:51,655 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4053 ImplicationChecksByTransitivity, 3328.7ms TimeCoverageRelationStatistics Valid=1710, Invalid=10946, Unknown=0, NotChecked=0, Total=12656 [2021-03-10 23:42:51,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-03-10 23:42:51,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 740. [2021-03-10 23:42:51,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.1502029769959403) internal successors, (1589), 739 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:51,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1589 transitions. [2021-03-10 23:42:51,672 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1589 transitions. Word has length 41 [2021-03-10 23:42:51,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:51,673 INFO L480 AbstractCegarLoop]: Abstraction has 740 states and 1589 transitions. [2021-03-10 23:42:51,673 INFO L481 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) [2021-03-10 23:42:51,673 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1589 transitions. [2021-03-10 23:42:51,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 23:42:51,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:51,674 INFO L519 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] [2021-03-10 23:42:51,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:51,887 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:51,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:51,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-03-10 23:42:51,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:51,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695728595] [2021-03-10 23:42:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:42:52,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695728595] [2021-03-10 23:42:52,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546987464] [2021-03-10 23:42:52,199 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 [2021-03-10 23:42:52,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:42:52,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:52,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:42:52,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:52,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:52,806 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 [2021-03-10 23:42:52,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:52,850 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-03-10 23:42:52,861 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. [2021-03-10 23:42:52,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-03-10 23:42:53,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:53,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:53,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:53,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:53,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:53,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:53,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:53,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:53,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:53,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:53,168 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 [2021-03-10 23:42:53,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:53,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:53,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:53,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:53,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:53,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:53,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:53,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:53,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:53,176 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 [2021-03-10 23:42:53,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:53,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:53,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:53,182 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-03-10 23:42:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:53,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:53,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-03-10 23:42:53,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472900144] [2021-03-10 23:42:53,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:42:53,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:53,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:42:53,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:42:53,191 INFO L87 Difference]: Start difference. First operand 740 states and 1589 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) [2021-03-10 23:42:55,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:55,090 INFO L93 Difference]: Finished difference Result 2305 states and 4887 transitions. [2021-03-10 23:42:55,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 23:42:55,091 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 [2021-03-10 23:42:55,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:55,096 INFO L225 Difference]: With dead ends: 2305 [2021-03-10 23:42:55,096 INFO L226 Difference]: Without dead ends: 2148 [2021-03-10 23:42:55,097 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1652.0ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 23:42:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2021-03-10 23:42:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 857. [2021-03-10 23:42:55,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.1401869158878504) internal successors, (1832), 856 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1832 transitions. [2021-03-10 23:42:55,111 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1832 transitions. Word has length 41 [2021-03-10 23:42:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:55,111 INFO L480 AbstractCegarLoop]: Abstraction has 857 states and 1832 transitions. [2021-03-10 23:42:55,112 INFO L481 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) [2021-03-10 23:42:55,112 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1832 transitions. [2021-03-10 23:42:55,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 23:42:55,113 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:55,113 INFO L519 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] [2021-03-10 23:42:55,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:55,317 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:55,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:55,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-03-10 23:42:55,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:55,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277457553] [2021-03-10 23:42:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:55,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277457553] [2021-03-10 23:42:55,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347108930] [2021-03-10 23:42:55,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:55,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:42:55,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:55,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 23:42:55,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:56,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:56,435 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 36 treesize of output 46 [2021-03-10 23:42:56,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:56,492 INFO L628 ElimStorePlain]: treesize reduction 12, result has 87.2 percent of original size [2021-03-10 23:42:56,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-10 23:42:56,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:70, output treesize:65 [2021-03-10 23:42:57,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:57,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:57,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:57,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:57,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:57,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:57,274 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 25 treesize of output 13 [2021-03-10 23:42:57,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:57,293 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.9 percent of original size [2021-03-10 23:42:57,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:57,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:54, output treesize:5 [2021-03-10 23:42:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:57,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:57,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 37 [2021-03-10 23:42:57,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526351343] [2021-03-10 23:42:57,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:42:57,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:57,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:42:57,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:42:57,305 INFO L87 Difference]: Start difference. First operand 857 states and 1832 transitions. Second operand has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 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) [2021-03-10 23:43:07,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:07,765 INFO L93 Difference]: Finished difference Result 2475 states and 5199 transitions. [2021-03-10 23:43:07,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 23:43:07,766 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 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 [2021-03-10 23:43:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:07,771 INFO L225 Difference]: With dead ends: 2475 [2021-03-10 23:43:07,771 INFO L226 Difference]: Without dead ends: 2210 [2021-03-10 23:43:07,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 5922.0ms TimeCoverageRelationStatistics Valid=1090, Invalid=6920, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 23:43:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-03-10 23:43:07,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 749. [2021-03-10 23:43:07,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 2.1550802139037435) internal successors, (1612), 748 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:07,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1612 transitions. [2021-03-10 23:43:07,785 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1612 transitions. Word has length 41 [2021-03-10 23:43:07,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:07,785 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 1612 transitions. [2021-03-10 23:43:07,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 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) [2021-03-10 23:43:07,785 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1612 transitions. [2021-03-10 23:43:07,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 23:43:07,786 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:07,786 INFO L519 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] [2021-03-10 23:43:07,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-03-10 23:43:07,999 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:08,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:08,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-03-10 23:43:08,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:08,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919538524] [2021-03-10 23:43:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:43:08,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919538524] [2021-03-10 23:43:08,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303515217] [2021-03-10 23:43:08,318 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 [2021-03-10 23:43:08,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:43:08,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:43:08,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:43:08,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:09,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:09,025 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 [2021-03-10 23:43:09,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:09,079 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.7 percent of original size [2021-03-10 23:43:09,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:43:09,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:52, output treesize:53 [2021-03-10 23:43:10,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:10,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:43:10,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:43:10,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:10,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 29 treesize of output 63 [2021-03-10 23:43:10,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 23:43:10,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:10,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:10,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:43:10,594 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-03-10 23:43:10,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 1 [2021-03-10 23:43:10,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:10,654 INFO L628 ElimStorePlain]: treesize reduction 38, result has 44.9 percent of original size [2021-03-10 23:43:10,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:10,658 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:100, output treesize:21 [2021-03-10 23:43:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:10,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:10,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-03-10 23:43:10,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049632463] [2021-03-10 23:43:10,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:43:10,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:10,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:43:10,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:43:10,729 INFO L87 Difference]: Start difference. First operand 749 states and 1612 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:13,967 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 23:43:15,503 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:43:16,226 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-10 23:43:16,566 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-10 23:43:17,299 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-10 23:43:17,944 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-03-10 23:43:20,482 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-10 23:43:22,658 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-03-10 23:43:23,064 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-03-10 23:43:26,662 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-03-10 23:43:27,819 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-03-10 23:43:28,481 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-03-10 23:43:29,125 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-03-10 23:43:35,796 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-03-10 23:43:38,122 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-03-10 23:43:38,801 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-03-10 23:43:42,236 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-03-10 23:43:44,660 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-03-10 23:43:45,212 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-10 23:43:46,923 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-03-10 23:43:49,138 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-03-10 23:43:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:50,822 INFO L93 Difference]: Finished difference Result 3396 states and 7220 transitions. [2021-03-10 23:43:50,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-03-10 23:43:50,822 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:43:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:50,831 INFO L225 Difference]: With dead ends: 3396 [2021-03-10 23:43:50,831 INFO L226 Difference]: Without dead ends: 3074 [2021-03-10 23:43:50,833 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5845 ImplicationChecksByTransitivity, 29022.5ms TimeCoverageRelationStatistics Valid=2687, Invalid=14343, Unknown=0, NotChecked=0, Total=17030 [2021-03-10 23:43:50,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-03-10 23:43:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 885. [2021-03-10 23:43:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.1572398190045248) internal successors, (1907), 884 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1907 transitions. [2021-03-10 23:43:50,851 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1907 transitions. Word has length 41 [2021-03-10 23:43:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:50,851 INFO L480 AbstractCegarLoop]: Abstraction has 885 states and 1907 transitions. [2021-03-10 23:43:50,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:50,851 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1907 transitions. [2021-03-10 23:43:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 23:43:50,852 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:50,852 INFO L519 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] [2021-03-10 23:43:51,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:51,068 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:51,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:51,068 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-03-10 23:43:51,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:51,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743384090] [2021-03-10 23:43:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:43:51,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743384090] [2021-03-10 23:43:51,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372709872] [2021-03-10 23:43:51,439 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 [2021-03-10 23:43:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:51,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:43:51,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:52,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:52,162 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 [2021-03-10 23:43:52,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:52,211 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-03-10 23:43:52,217 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. [2021-03-10 23:43:52,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-03-10 23:43:52,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:52,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:43:52,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:52,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:52,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:52,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:52,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:43:52,302 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 [2021-03-10 23:43:52,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:52,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:52,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:52,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-03-10 23:43:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:52,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:52,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-03-10 23:43:52,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411594607] [2021-03-10 23:43:52,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:43:52,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:52,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:43:52,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:43:52,324 INFO L87 Difference]: Start difference. First operand 885 states and 1907 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) [2021-03-10 23:43:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:54,627 INFO L93 Difference]: Finished difference Result 3311 states and 7108 transitions. [2021-03-10 23:43:54,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:43:54,628 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 [2021-03-10 23:43:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:54,641 INFO L225 Difference]: With dead ends: 3311 [2021-03-10 23:43:54,641 INFO L226 Difference]: Without dead ends: 3103 [2021-03-10 23:43:54,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1715.3ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 23:43:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3103 states. [2021-03-10 23:43:54,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3103 to 1077. [2021-03-10 23:43:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 2.150557620817844) internal successors, (2314), 1076 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 2314 transitions. [2021-03-10 23:43:54,659 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 2314 transitions. Word has length 41 [2021-03-10 23:43:54,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:54,659 INFO L480 AbstractCegarLoop]: Abstraction has 1077 states and 2314 transitions. [2021-03-10 23:43:54,659 INFO L481 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) [2021-03-10 23:43:54,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 2314 transitions. [2021-03-10 23:43:54,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 23:43:54,660 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:54,661 INFO L519 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] [2021-03-10 23:43:54,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-03-10 23:43:54,875 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:54,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:54,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-03-10 23:43:54,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:54,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226975791] [2021-03-10 23:43:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:55,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226975791] [2021-03-10 23:43:55,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535498115] [2021-03-10 23:43:55,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:55,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:43:55,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:43:55,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:43:55,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:55,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:55,952 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 [2021-03-10 23:43:55,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:56,024 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-03-10 23:43:56,031 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. [2021-03-10 23:43:56,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-03-10 23:43:56,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:56,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:56,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:56,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:56,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:56,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:56,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:43:56,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:43:56,187 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 [2021-03-10 23:43:56,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:56,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:56,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:56,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-03-10 23:43:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:56,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:56,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-03-10 23:43:56,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405706873] [2021-03-10 23:43:56,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:43:56,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:56,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:43:56,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:43:56,208 INFO L87 Difference]: Start difference. First operand 1077 states and 2314 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) [2021-03-10 23:43:59,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:59,067 INFO L93 Difference]: Finished difference Result 3732 states and 8006 transitions. [2021-03-10 23:43:59,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:43:59,067 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 [2021-03-10 23:43:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:59,076 INFO L225 Difference]: With dead ends: 3732 [2021-03-10 23:43:59,076 INFO L226 Difference]: Without dead ends: 3488 [2021-03-10 23:43:59,077 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1970.5ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:43:59,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2021-03-10 23:43:59,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 1343. [2021-03-10 23:43:59,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 2.1609538002980626) internal successors, (2900), 1342 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2900 transitions. [2021-03-10 23:43:59,099 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2900 transitions. Word has length 41 [2021-03-10 23:43:59,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:59,099 INFO L480 AbstractCegarLoop]: Abstraction has 1343 states and 2900 transitions. [2021-03-10 23:43:59,099 INFO L481 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) [2021-03-10 23:43:59,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2900 transitions. [2021-03-10 23:43:59,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 23:43:59,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:59,101 INFO L519 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] [2021-03-10 23:43:59,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:59,315 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:59,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:59,315 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-03-10 23:43:59,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:59,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222113157] [2021-03-10 23:43:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:59,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222113157] [2021-03-10 23:43:59,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423770458] [2021-03-10 23:43:59,736 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 [2021-03-10 23:43:59,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:43:59,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:43:59,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 23:43:59,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:00,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:00,272 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 [2021-03-10 23:44:00,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:00,331 INFO L628 ElimStorePlain]: treesize reduction 43, result has 60.2 percent of original size [2021-03-10 23:44:00,337 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. [2021-03-10 23:44:00,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:37 [2021-03-10 23:44:00,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:00,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:00,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:00,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:00,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:00,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:00,779 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 [2021-03-10 23:44:00,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 23:44:00,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:00,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:00,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:00,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:00,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:00,861 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-03-10 23:44:00,861 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 [2021-03-10 23:44:00,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:00,950 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-03-10 23:44:00,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:44:00,963 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-03-10 23:44:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:01,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:01,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-03-10 23:44:01,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932746099] [2021-03-10 23:44:01,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-03-10 23:44:01,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:01,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-03-10 23:44:01,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:44:01,093 INFO L87 Difference]: Start difference. First operand 1343 states and 2900 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) [2021-03-10 23:44:05,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:05,113 INFO L93 Difference]: Finished difference Result 3547 states and 7648 transitions. [2021-03-10 23:44:05,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:44:05,113 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 [2021-03-10 23:44:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:05,118 INFO L225 Difference]: With dead ends: 3547 [2021-03-10 23:44:05,118 INFO L226 Difference]: Without dead ends: 3386 [2021-03-10 23:44:05,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 3203.3ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 23:44:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-03-10 23:44:05,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 1486. [2021-03-10 23:44:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 2.164309764309764) internal successors, (3214), 1485 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 3214 transitions. [2021-03-10 23:44:05,146 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 3214 transitions. Word has length 41 [2021-03-10 23:44:05,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:05,146 INFO L480 AbstractCegarLoop]: Abstraction has 1486 states and 3214 transitions. [2021-03-10 23:44:05,146 INFO L481 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) [2021-03-10 23:44:05,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 3214 transitions. [2021-03-10 23:44:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 23:44:05,148 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:05,148 INFO L519 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] [2021-03-10 23:44:05,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:05,357 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:05,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:05,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-03-10 23:44:05,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:05,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245958361] [2021-03-10 23:44:05,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:05,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245958361] [2021-03-10 23:44:05,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226503763] [2021-03-10 23:44:05,427 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 [2021-03-10 23:44:05,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:44:05,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:44:05,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 23:44:05,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:05,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:05,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-03-10 23:44:05,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382769825] [2021-03-10 23:44:05,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:44:05,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:05,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:44:05,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:44:05,535 INFO L87 Difference]: Start difference. First operand 1486 states and 3214 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) [2021-03-10 23:44:05,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:05,621 INFO L93 Difference]: Finished difference Result 2022 states and 4373 transitions. [2021-03-10 23:44:05,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:44:05,621 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 [2021-03-10 23:44:05,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:05,624 INFO L225 Difference]: With dead ends: 2022 [2021-03-10 23:44:05,624 INFO L226 Difference]: Without dead ends: 1972 [2021-03-10 23:44:05,624 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:44:05,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-03-10 23:44:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1624. [2021-03-10 23:44:05,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 2.176833025261861) internal successors, (3533), 1623 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:05,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 3533 transitions. [2021-03-10 23:44:05,643 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 3533 transitions. Word has length 45 [2021-03-10 23:44:05,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:05,643 INFO L480 AbstractCegarLoop]: Abstraction has 1624 states and 3533 transitions. [2021-03-10 23:44:05,643 INFO L481 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) [2021-03-10 23:44:05,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 3533 transitions. [2021-03-10 23:44:05,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 23:44:05,645 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:05,645 INFO L519 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] [2021-03-10 23:44:05,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-03-10 23:44:05,855 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:05,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:05,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-03-10 23:44:05,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:05,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035825975] [2021-03-10 23:44:05,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-03-10 23:44:05,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035825975] [2021-03-10 23:44:05,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451780796] [2021-03-10 23:44:05,886 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:05,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:44:05,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:44:05,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:44:05,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 23:44:05,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:05,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 23:44:05,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576839015] [2021-03-10 23:44:05,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:44:05,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:05,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:44:05,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:44:05,986 INFO L87 Difference]: Start difference. First operand 1624 states and 3533 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) 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) [2021-03-10 23:44:06,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:06,017 INFO L93 Difference]: Finished difference Result 2107 states and 4556 transitions. [2021-03-10 23:44:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 23:44:06,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) 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 [2021-03-10 23:44:06,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:06,020 INFO L225 Difference]: With dead ends: 2107 [2021-03-10 23:44:06,021 INFO L226 Difference]: Without dead ends: 2107 [2021-03-10 23:44:06,021 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:44:06,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-03-10 23:44:06,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1448. [2021-03-10 23:44:06,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 2.1727712508638564) internal successors, (3144), 1447 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:06,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 3144 transitions. [2021-03-10 23:44:06,037 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 3144 transitions. Word has length 46 [2021-03-10 23:44:06,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:06,037 INFO L480 AbstractCegarLoop]: Abstraction has 1448 states and 3144 transitions. [2021-03-10 23:44:06,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.333333333333334) 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) [2021-03-10 23:44:06,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 3144 transitions. [2021-03-10 23:44:06,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 23:44:06,039 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:06,039 INFO L519 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] [2021-03-10 23:44:06,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-03-10 23:44:06,254 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:06,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:06,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-03-10 23:44:06,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:06,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274490620] [2021-03-10 23:44:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:44:06,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274490620] [2021-03-10 23:44:06,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899377592] [2021-03-10 23:44:06,289 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 [2021-03-10 23:44:06,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:44:06,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:44:06,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:44:06,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 23:44:06,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:06,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 23:44:06,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386162776] [2021-03-10 23:44:06,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:44:06,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:06,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:44:06,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:44:06,402 INFO L87 Difference]: Start difference. First operand 1448 states and 3144 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) [2021-03-10 23:44:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:06,433 INFO L93 Difference]: Finished difference Result 1607 states and 3450 transitions. [2021-03-10 23:44:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:44:06,433 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 [2021-03-10 23:44:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:06,435 INFO L225 Difference]: With dead ends: 1607 [2021-03-10 23:44:06,435 INFO L226 Difference]: Without dead ends: 1607 [2021-03-10 23:44:06,436 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:44:06,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-03-10 23:44:06,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1210. [2021-03-10 23:44:06,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 2.1563275434243176) internal successors, (2607), 1209 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:06,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 2607 transitions. [2021-03-10 23:44:06,449 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 2607 transitions. Word has length 46 [2021-03-10 23:44:06,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:06,449 INFO L480 AbstractCegarLoop]: Abstraction has 1210 states and 2607 transitions. [2021-03-10 23:44:06,449 INFO L481 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) [2021-03-10 23:44:06,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 2607 transitions. [2021-03-10 23:44:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 23:44:06,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:06,451 INFO L519 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] [2021-03-10 23:44:06,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-03-10 23:44:06,661 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:06,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:06,661 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-03-10 23:44:06,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:06,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416854454] [2021-03-10 23:44:06,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:07,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416854454] [2021-03-10 23:44:07,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581399818] [2021-03-10 23:44:07,323 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 [2021-03-10 23:44:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:07,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 23:44:07,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:07,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:07,982 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 [2021-03-10 23:44:07,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:08,092 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-10 23:44:08,093 INFO L628 ElimStorePlain]: treesize reduction 75, result has 63.9 percent of original size [2021-03-10 23:44:08,119 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. [2021-03-10 23:44:08,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:68 [2021-03-10 23:44:08,676 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-03-10 23:44:08,676 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 [2021-03-10 23:44:08,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:08,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:08,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:08,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-03-10 23:44:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:08,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:08,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-03-10 23:44:08,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837778864] [2021-03-10 23:44:08,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-03-10 23:44:08,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:08,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-03-10 23:44:08,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:44:08,695 INFO L87 Difference]: Start difference. First operand 1210 states and 2607 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) [2021-03-10 23:44:12,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:12,969 INFO L93 Difference]: Finished difference Result 2758 states and 5880 transitions. [2021-03-10 23:44:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 23:44:12,970 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 [2021-03-10 23:44:12,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:12,973 INFO L225 Difference]: With dead ends: 2758 [2021-03-10 23:44:12,974 INFO L226 Difference]: Without dead ends: 2662 [2021-03-10 23:44:12,974 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 3204.3ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 23:44:12,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-03-10 23:44:12,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 1302. [2021-03-10 23:44:12,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 2.166794773251345) internal successors, (2819), 1301 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2819 transitions. [2021-03-10 23:44:12,990 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2819 transitions. Word has length 50 [2021-03-10 23:44:12,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:12,990 INFO L480 AbstractCegarLoop]: Abstraction has 1302 states and 2819 transitions. [2021-03-10 23:44:12,991 INFO L481 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) [2021-03-10 23:44:12,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2819 transitions. [2021-03-10 23:44:12,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 23:44:12,992 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:12,992 INFO L519 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] [2021-03-10 23:44:13,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-03-10 23:44:13,207 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:13,207 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-03-10 23:44:13,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:13,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421598553] [2021-03-10 23:44:13,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:44:13,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421598553] [2021-03-10 23:44:13,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082938819] [2021-03-10 23:44:13,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:13,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:44:13,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:44:13,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 23:44:13,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:15,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:15,188 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 [2021-03-10 23:44:15,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:15,306 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-03-10 23:44:15,306 INFO L628 ElimStorePlain]: treesize reduction 48, result has 76.7 percent of original size [2021-03-10 23:44:15,329 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. [2021-03-10 23:44:15,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:99 [2021-03-10 23:44:16,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:44:16,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:44:16,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:44:16,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:44:16,031 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 [2021-03-10 23:44:16,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:16,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:44:16,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:44:16,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:44:16,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:44:16,062 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 [2021-03-10 23:44:16,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:16,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:44:16,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:16,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:44:16,078 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 [2021-03-10 23:44:16,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:16,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:16,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:16,089 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:5 [2021-03-10 23:44:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:16,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:16,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-03-10 23:44:16,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182425621] [2021-03-10 23:44:16,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-03-10 23:44:16,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:16,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-03-10 23:44:16,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:44:16,103 INFO L87 Difference]: Start difference. First operand 1302 states and 2819 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) [2021-03-10 23:44:23,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:23,433 INFO L93 Difference]: Finished difference Result 3300 states and 7015 transitions. [2021-03-10 23:44:23,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-03-10 23:44:23,434 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 [2021-03-10 23:44:23,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:23,439 INFO L225 Difference]: With dead ends: 3300 [2021-03-10 23:44:23,439 INFO L226 Difference]: Without dead ends: 3187 [2021-03-10 23:44:23,440 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 5662.6ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-03-10 23:44:23,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-03-10 23:44:23,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 1656. [2021-03-10 23:44:23,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.1522658610271903) internal successors, (3562), 1655 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:23,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 3562 transitions. [2021-03-10 23:44:23,462 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 3562 transitions. Word has length 50 [2021-03-10 23:44:23,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:23,462 INFO L480 AbstractCegarLoop]: Abstraction has 1656 states and 3562 transitions. [2021-03-10 23:44:23,462 INFO L481 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) [2021-03-10 23:44:23,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 3562 transitions. [2021-03-10 23:44:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 23:44:23,464 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:23,464 INFO L519 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] [2021-03-10 23:44:23,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable240 [2021-03-10 23:44:23,679 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:23,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:23,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-03-10 23:44:23,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:23,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334965331] [2021-03-10 23:44:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:24,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334965331] [2021-03-10 23:44:24,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606671601] [2021-03-10 23:44:24,357 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 [2021-03-10 23:44:24,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:44:24,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:44:24,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-03-10 23:44:24,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:27,260 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:44:27,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:27,427 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 [2021-03-10 23:44:27,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:27,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:27,482 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 [2021-03-10 23:44:27,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:27,825 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 101 [2021-03-10 23:44:27,826 INFO L628 ElimStorePlain]: treesize reduction 124, result has 69.2 percent of original size [2021-03-10 23:44:27,933 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. [2021-03-10 23:44:27,933 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:150 [2021-03-10 23:44:41,193 WARN L205 SmtUtils]: Spent 8.82 s on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 23:45:15,471 WARN L205 SmtUtils]: Spent 16.96 s on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-03-10 23:45:15,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:15,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:15,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:16,024 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 23:45:16,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:16,025 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 [2021-03-10 23:45:17,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-03-10 23:45:17,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:17,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:45:17,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:17,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:17,839 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-03-10 23:45:17,840 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-03-10 23:45:17,840 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 [2021-03-10 23:45:18,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:45:18,775 WARN L205 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 68 [2021-03-10 23:45:18,776 INFO L628 ElimStorePlain]: treesize reduction 932, result has 12.5 percent of original size [2021-03-10 23:45:18,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 23:45:18,809 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:47 [2021-03-10 23:45:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:19,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:45:19,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-03-10 23:45:19,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286071622] [2021-03-10 23:45:19,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-03-10 23:45:19,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:45:19,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-03-10 23:45:19,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2266, Unknown=5, NotChecked=0, Total=2550 [2021-03-10 23:45:19,004 INFO L87 Difference]: Start difference. First operand 1656 states and 3562 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) [2021-03-10 23:45:46,933 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 40 [2021-03-10 23:45:55,606 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 42 [2021-03-10 23:46:03,324 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-03-10 23:46:20,313 WARN L205 SmtUtils]: Spent 10.39 s on a formula simplification. DAG size of input: 110 DAG size of output: 64 [2021-03-10 23:46:26,524 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-03-10 23:46:35,254 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-03-10 23:46:45,974 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-03-10 23:46:53,278 WARN L205 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 133 DAG size of output: 44 [2021-03-10 23:47:07,314 WARN L205 SmtUtils]: Spent 8.60 s on a formula simplification. DAG size of input: 125 DAG size of output: 79 [2021-03-10 23:47:15,457 WARN L205 SmtUtils]: Spent 5.92 s on a formula simplification. DAG size of input: 123 DAG size of output: 46 [2021-03-10 23:47:20,453 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-03-10 23:47:32,394 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 55 [2021-03-10 23:47:38,457 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 68 [2021-03-10 23:47:46,807 WARN L205 SmtUtils]: Spent 6.68 s on a formula simplification. DAG size of input: 125 DAG size of output: 48 [2021-03-10 23:47:59,099 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 52 [2021-03-10 23:48:06,167 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 65 [2021-03-10 23:48:11,385 WARN L205 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2021-03-10 23:48:19,199 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 122 DAG size of output: 51 [2021-03-10 23:48:26,235 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-03-10 23:48:35,028 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 64 [2021-03-10 23:48:54,744 WARN L205 SmtUtils]: Spent 5.86 s on a formula simplification. DAG size of input: 124 DAG size of output: 53 [2021-03-10 23:49:04,690 WARN L205 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 130 DAG size of output: 51 [2021-03-10 23:49:22,604 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 126 DAG size of output: 70 [2021-03-10 23:49:39,589 WARN L205 SmtUtils]: Spent 3.79 s on a formula simplification. DAG size of input: 100 DAG size of output: 56 [2021-03-10 23:49:56,647 WARN L205 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 51 [2021-03-10 23:50:07,169 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 71 [2021-03-10 23:50:32,022 WARN L205 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 128 DAG size of output: 53 [2021-03-10 23:50:34,253 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-10 23:50:48,161 WARN L205 SmtUtils]: Spent 5.57 s on a formula simplification. DAG size of input: 109 DAG size of output: 60 [2021-03-10 23:50:50,825 WARN L205 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 145 DAG size of output: 53 [2021-03-10 23:51:08,441 WARN L205 SmtUtils]: Spent 5.61 s on a formula simplification. DAG size of input: 129 DAG size of output: 56 [2021-03-10 23:51:29,958 WARN L205 SmtUtils]: Spent 9.14 s on a formula simplification. DAG size of input: 118 DAG size of output: 64 [2021-03-10 23:51:48,698 WARN L205 SmtUtils]: Spent 4.54 s on a formula simplification. DAG size of input: 133 DAG size of output: 55 [2021-03-10 23:51:58,549 WARN L205 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-03-10 23:52:05,191 WARN L205 SmtUtils]: Spent 2.76 s on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-03-10 23:52:13,906 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 23:52:32,687 WARN L205 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 50 [2021-03-10 23:53:05,182 WARN L205 SmtUtils]: Spent 17.30 s on a formula simplification. DAG size of input: 116 DAG size of output: 60 [2021-03-10 23:53:19,652 WARN L205 SmtUtils]: Spent 6.38 s on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-03-10 23:53:28,907 WARN L205 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-03-10 23:53:45,133 WARN L205 SmtUtils]: Spent 8.95 s on a formula simplification. DAG size of input: 81 DAG size of output: 36 [2021-03-10 23:54:28,540 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 144 DAG size of output: 52 [2021-03-10 23:54:49,775 WARN L205 SmtUtils]: Spent 10.92 s on a formula simplification. DAG size of input: 102 DAG size of output: 60 [2021-03-10 23:54:55,529 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 23:55:00,081 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-03-10 23:55:05,760 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2021-03-10 23:55:09,706 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2021-03-10 23:55:33,322 WARN L205 SmtUtils]: Spent 5.35 s on a formula simplification. DAG size of input: 119 DAG size of output: 65 [2021-03-10 23:55:37,244 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 23:55:53,788 WARN L205 SmtUtils]: Spent 6.43 s on a formula simplification. DAG size of input: 104 DAG size of output: 62 [2021-03-10 23:56:17,410 WARN L205 SmtUtils]: Spent 7.40 s on a formula simplification. DAG size of input: 116 DAG size of output: 67 [2021-03-10 23:56:48,512 WARN L205 SmtUtils]: Spent 5.24 s on a formula simplification. DAG size of input: 121 DAG size of output: 67 [2021-03-10 23:56:53,907 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 23:57:07,562 WARN L205 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 93 DAG size of output: 67 Received shutdown request... [2021-03-10 23:57:13,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-03-10 23:57:13,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-03-10 23:57:13,431 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 23:57:13,434 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 23:57:13,434 INFO L202 PluginConnector]: Adding new model dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 11:57:13 BasicIcfg [2021-03-10 23:57:13,434 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 23:57:13,435 INFO L168 Benchmark]: Toolchain (without parser) took 877722.81 ms. Allocated memory was 390.1 MB in the beginning and 486.5 MB in the end (delta: 96.5 MB). Free memory was 369.7 MB in the beginning and 194.2 MB in the end (delta: 175.5 MB). Peak memory consumption was 275.5 MB. Max. memory is 16.0 GB. [2021-03-10 23:57:13,435 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 390.1 MB. Free memory was 371.0 MB in the beginning and 370.9 MB in the end (delta: 83.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:57:13,435 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.74 ms. Allocated memory is still 390.1 MB. Free memory was 369.3 MB in the beginning and 367.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:57:13,435 INFO L168 Benchmark]: Boogie Preprocessor took 12.97 ms. Allocated memory is still 390.1 MB. Free memory was 367.8 MB in the beginning and 366.8 MB in the end (delta: 972.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:57:13,435 INFO L168 Benchmark]: RCFGBuilder took 249.72 ms. Allocated memory is still 390.1 MB. Free memory was 366.8 MB in the beginning and 353.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-03-10 23:57:13,435 INFO L168 Benchmark]: TraceAbstraction took 877434.94 ms. Allocated memory was 390.1 MB in the beginning and 486.5 MB in the end (delta: 96.5 MB). Free memory was 353.4 MB in the beginning and 194.2 MB in the end (delta: 159.2 MB). Peak memory consumption was 258.8 MB. Max. memory is 16.0 GB. [2021-03-10 23:57:13,435 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 390.1 MB. Free memory was 371.0 MB in the beginning and 370.9 MB in the end (delta: 83.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.74 ms. Allocated memory is still 390.1 MB. Free memory was 369.3 MB in the beginning and 367.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.97 ms. Allocated memory is still 390.1 MB. Free memory was 367.8 MB in the beginning and 366.8 MB in the end (delta: 972.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 249.72 ms. Allocated memory is still 390.1 MB. Free memory was 366.8 MB in the beginning and 353.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 877434.94 ms. Allocated memory was 390.1 MB in the beginning and 486.5 MB in the end (delta: 96.5 MB). Free memory was 353.4 MB in the beginning and 194.2 MB in the end (delta: 159.2 MB). Peak memory consumption was 258.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 62). Cancelled while BasicCegarLoop was constructing difference of abstraction (1656states) and FLOYD_HOARE automaton (currently 115 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 153 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 877309.9ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 33.1ms, AutomataDifference: 796437.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1139 SDtfs, 5498 SDslu, 11535 SDs, 0 SdLazy, 27930 SolverSat, 3210 SolverUnsat, 21 SolverUnknown, 0 SolverNotchecked, 148104.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1819 GetRequests, 592 SyntacticMatches, 43 SemanticMatches, 1183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36333 ImplicationChecksByTransitivity, 695888.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1656occurred in iteration=22, InterpolantAutomatonStates: 764, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 333.3ms AutomataMinimizationTime, 22 MinimizatonAttempts, 19353 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 97.0ms SsaConstructionTime, 365.8ms SatisfiabilityAnalysisTime, 75145.2ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 305 QuantifiedInterpolants, 27908 SizeOfPredicates, 228 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 537 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 269/1315 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