/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/max-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 00:00:03,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 00:00:03,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 00:00:03,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 00:00:03,142 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-11 00:00:03,162 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 00:00:03,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 00:00:03,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-11 00:00:03,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-11 00:00:03,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 00:00:03,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 00:00:03,164 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 00:00:03,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 00:00:03,165 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 00:00:03,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 00:00:03,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 00:00:03,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 00:00:03,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 00:00:03,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 00:00:03,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 00:00:03,165 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 00:00:03,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 00:00:03,166 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 00:00:03,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 00:00:03,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 00:00:03,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 00:00:03,166 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 00:00:03,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 00:00:03,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:00:03,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 00:00:03,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 00:00:03,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 00:00:03,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 00:00:03,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 00:00:03,167 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 00:00:03,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 00:00:03,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 00:00:03,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 00:00:03,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 00:00:03,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 00:00:03,463 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 00:00:03,465 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 00:00:03,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun-alt.wvr.bpl [2021-03-11 00:00:03,466 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun-alt.wvr.bpl' [2021-03-11 00:00:03,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 00:00:03,548 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 00:00:03,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 00:00:03,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 00:00:03,550 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 00:00:03,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:03" (1/1) ... [2021-03-11 00:00:03,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:03" (1/1) ... [2021-03-11 00:00:03,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 00:00:03,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 00:00:03,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 00:00:03,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 00:00:03,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:03" (1/1) ... [2021-03-11 00:00:03,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:03" (1/1) ... [2021-03-11 00:00:03,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:03" (1/1) ... [2021-03-11 00:00:03,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:03" (1/1) ... [2021-03-11 00:00:03,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:03" (1/1) ... [2021-03-11 00:00:03,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:03" (1/1) ... [2021-03-11 00:00:03,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:03" (1/1) ... [2021-03-11 00:00:03,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 00:00:03,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 00:00:03,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 00:00:03,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 00:00:03,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:00:03,653 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 00:00:03,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 00:00:03,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 00:00:03,654 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 00:00:03,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 00:00:03,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 00:00:03,655 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 00:00:03,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 00:00:03,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 00:00:03,655 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 00:00:03,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 00:00:03,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 00:00:03,656 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 00:00:03,929 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 00:00:03,930 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 00:00:03,931 INFO L202 PluginConnector]: Adding new model max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:00:03 BoogieIcfgContainer [2021-03-11 00:00:03,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 00:00:03,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 00:00:03,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 00:00:03,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 00:00:03,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:03" (1/2) ... [2021-03-11 00:00:03,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3febe393 and model type max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 12:00:03, skipping insertion in model container [2021-03-11 00:00:03,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:00:03" (2/2) ... [2021-03-11 00:00:03,938 INFO L111 eAbstractionObserver]: Analyzing ICFG max-fun-alt.wvr.bpl [2021-03-11 00:00:03,952 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 00:00:03,952 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 00:00:03,955 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 00:00:03,956 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 00:00:04,012 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 00:00:04,028 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 00:00:04,057 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 00:00:04,064 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 00:00:04,064 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 00:00:04,065 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 00:00:04,065 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 00:00:04,066 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 00:00:04,066 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 00:00:04,066 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 00:00:04,078 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-03-11 00:00:04,100 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:04,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-11 00:00:04,113 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:04,114 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:04,114 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:04,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:04,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1272469491, now seen corresponding path program 1 times [2021-03-11 00:00:04,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:04,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131158260] [2021-03-11 00:00:04,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:04,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131158260] [2021-03-11 00:00:04,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:00:04,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 00:00:04,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271170748] [2021-03-11 00:00:04,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 00:00:04,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:04,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 00:00:04,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:00:04,298 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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 6.0) 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) [2021-03-11 00:00:04,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:04,345 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-03-11 00:00:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 00:00:04,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) 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 [2021-03-11 00:00:04,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:04,357 INFO L225 Difference]: With dead ends: 217 [2021-03-11 00:00:04,358 INFO L226 Difference]: Without dead ends: 202 [2021-03-11 00:00:04,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:00:04,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-11 00:00:04,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-03-11 00:00:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:04,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-03-11 00:00:04,400 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-03-11 00:00:04,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:04,401 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-03-11 00:00:04,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) 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) [2021-03-11 00:00:04,401 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-03-11 00:00:04,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 00:00:04,403 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:04,403 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] [2021-03-11 00:00:04,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 00:00:04,403 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:04,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:04,404 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-03-11 00:00:04,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:04,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276296893] [2021-03-11 00:00:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:04,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276296893] [2021-03-11 00:00:04,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:00:04,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:00:04,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111517097] [2021-03-11 00:00:04,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 00:00:04,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:04,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 00:00:04,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 00:00:04,444 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:04,473 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-03-11 00:00:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 00:00:04,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-11 00:00:04,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:04,475 INFO L225 Difference]: With dead ends: 158 [2021-03-11 00:00:04,475 INFO L226 Difference]: Without dead ends: 158 [2021-03-11 00:00:04,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:00:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-03-11 00:00:04,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-03-11 00:00:04,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:04,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-03-11 00:00:04,485 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-03-11 00:00:04,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:04,485 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-03-11 00:00:04,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-03-11 00:00:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 00:00:04,487 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:04,487 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] [2021-03-11 00:00:04,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 00:00:04,487 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:04,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:04,488 INFO L82 PathProgramCache]: Analyzing trace with hash 296923691, now seen corresponding path program 1 times [2021-03-11 00:00:04,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:04,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630118235] [2021-03-11 00:00:04,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:04,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630118235] [2021-03-11 00:00:04,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:00:04,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:00:04,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604673327] [2021-03-11 00:00:04,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:00:04,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:04,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:00:04,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:00:04,543 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:04,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:04,583 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-03-11 00:00:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 00:00:04,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-11 00:00:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:04,585 INFO L225 Difference]: With dead ends: 183 [2021-03-11 00:00:04,585 INFO L226 Difference]: Without dead ends: 183 [2021-03-11 00:00:04,586 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:00:04,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-11 00:00:04,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-03-11 00:00:04,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-03-11 00:00:04,594 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-03-11 00:00:04,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:04,595 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-03-11 00:00:04,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:04,595 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-03-11 00:00:04,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:00:04,596 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:04,596 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] [2021-03-11 00:00:04,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 00:00:04,596 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:04,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:04,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-03-11 00:00:04,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:04,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717845817] [2021-03-11 00:00:04,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:04,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717845817] [2021-03-11 00:00:04,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220283084] [2021-03-11 00:00:04,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:04,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-11 00:00:04,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:05,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:05,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:05,385 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-11 00:00:05,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:05,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:05,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:05,391 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-03-11 00:00:05,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:05,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:05,400 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-11 00:00:05,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:05,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:05,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:00:05,415 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:85, output treesize:15 [2021-03-11 00:00:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:05,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:05,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:00:05,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633407517] [2021-03-11 00:00:05,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:05,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:05,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:05,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:05,451 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:05,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:05,668 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-03-11 00:00:05,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:00:05,669 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:00:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:05,671 INFO L225 Difference]: With dead ends: 330 [2021-03-11 00:00:05,671 INFO L226 Difference]: Without dead ends: 315 [2021-03-11 00:00:05,671 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 400.4ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:00:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-03-11 00:00:05,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-03-11 00:00:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:05,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-03-11 00:00:05,692 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-03-11 00:00:05,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:05,692 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-03-11 00:00:05,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:05,693 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-03-11 00:00:05,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:00:05,697 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:05,698 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] [2021-03-11 00:00:05,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-03-11 00:00:05,914 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:05,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:05,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-03-11 00:00:05,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:05,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809884385] [2021-03-11 00:00:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:06,238 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-03-11 00:00:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:06,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809884385] [2021-03-11 00:00:06,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610657455] [2021-03-11 00:00:06,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:06,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:00:06,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:06,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-11 00:00:06,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:06,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:06,537 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 11 treesize of output 15 [2021-03-11 00:00:06,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:06,559 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:00:06,559 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 16 treesize of output 14 [2021-03-11 00:00:06,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:06,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:06,574 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 21 treesize of output 21 [2021-03-11 00:00:06,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:06,584 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:00:06,584 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 16 treesize of output 14 [2021-03-11 00:00:06,596 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:06,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:06,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:00:06,658 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:71 [2021-03-11 00:00:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:06,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:06,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-03-11 00:00:06,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40872863] [2021-03-11 00:00:06,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:00:06,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:06,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:00:06,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:00:06,771 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:07,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:07,323 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-03-11 00:00:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:00:07,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:00:07,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:07,326 INFO L225 Difference]: With dead ends: 374 [2021-03-11 00:00:07,326 INFO L226 Difference]: Without dead ends: 359 [2021-03-11 00:00:07,326 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 654.5ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:00:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-03-11 00:00:07,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-03-11 00:00:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-03-11 00:00:07,345 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-03-11 00:00:07,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:07,346 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-03-11 00:00:07,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:07,349 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-03-11 00:00:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:00:07,353 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:07,353 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] [2021-03-11 00:00:07,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-11 00:00:07,567 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:07,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:07,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-03-11 00:00:07,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:07,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972277966] [2021-03-11 00:00:07,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:07,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972277966] [2021-03-11 00:00:07,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062619532] [2021-03-11 00:00:07,691 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 [2021-03-11 00:00:07,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:00:07,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:07,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:00:07,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:07,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-11 00:00:07,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:07,835 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 21 treesize of output 13 [2021-03-11 00:00:07,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:07,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-11 00:00:07,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:07,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:07,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:00:07,848 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:67, output treesize:15 [2021-03-11 00:00:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:07,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:07,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:00:07,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12241817] [2021-03-11 00:00:07,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:00:07,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:07,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:00:07,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:00:07,887 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:08,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:08,057 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-03-11 00:00:08,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:00:08,057 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:00:08,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:08,059 INFO L225 Difference]: With dead ends: 363 [2021-03-11 00:00:08,059 INFO L226 Difference]: Without dead ends: 348 [2021-03-11 00:00:08,060 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 203.1ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:00:08,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-03-11 00:00:08,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-03-11 00:00:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-03-11 00:00:08,068 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-03-11 00:00:08,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:08,068 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-03-11 00:00:08,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:08,068 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-03-11 00:00:08,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:00:08,069 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:08,069 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] [2021-03-11 00:00:08,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:08,283 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:08,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:08,284 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-03-11 00:00:08,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:08,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267156263] [2021-03-11 00:00:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:08,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267156263] [2021-03-11 00:00:08,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101446908] [2021-03-11 00:00:08,443 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 [2021-03-11 00:00:08,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:00:08,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:08,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-11 00:00:08,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:08,681 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:00:08,682 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 16 treesize of output 14 [2021-03-11 00:00:08,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:08,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:08,699 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 21 treesize of output 21 [2021-03-11 00:00:08,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:08,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:08,773 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:00:08,773 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 16 treesize of output 14 [2021-03-11 00:00:08,776 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:08,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:08,785 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 11 treesize of output 15 [2021-03-11 00:00:08,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:08,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:08,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:00:08,844 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:121, output treesize:71 [2021-03-11 00:00:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:08,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:08,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:00:08,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78674861] [2021-03-11 00:00:08,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:08,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:08,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:08,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:08,929 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:09,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:09,248 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-03-11 00:00:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:00:09,248 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:00:09,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:09,250 INFO L225 Difference]: With dead ends: 425 [2021-03-11 00:00:09,250 INFO L226 Difference]: Without dead ends: 410 [2021-03-11 00:00:09,251 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 384.0ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:00:09,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-03-11 00:00:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-03-11 00:00:09,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-03-11 00:00:09,258 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-03-11 00:00:09,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:09,258 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-03-11 00:00:09,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:09,258 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-03-11 00:00:09,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:09,259 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:09,259 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:09,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:09,475 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:09,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:09,475 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-03-11 00:00:09,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:09,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539315084] [2021-03-11 00:00:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:09,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539315084] [2021-03-11 00:00:09,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141224366] [2021-03-11 00:00:09,529 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 [2021-03-11 00:00:09,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:00:09,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:09,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:09,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:09,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:09,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:00:09,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629287200] [2021-03-11 00:00:09,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:00:09,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:09,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:00:09,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:00:09,641 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:09,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:09,974 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-03-11 00:00:09,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:00:09,975 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:09,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:09,977 INFO L225 Difference]: With dead ends: 619 [2021-03-11 00:00:09,977 INFO L226 Difference]: Without dead ends: 619 [2021-03-11 00:00:09,978 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:00:09,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-03-11 00:00:09,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-03-11 00:00:09,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-03-11 00:00:09,988 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-03-11 00:00:09,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:09,988 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-03-11 00:00:09,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:09,989 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-03-11 00:00:09,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:09,990 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:09,991 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:10,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:10,199 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:10,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:10,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-03-11 00:00:10,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:10,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147750323] [2021-03-11 00:00:10,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:10,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147750323] [2021-03-11 00:00:10,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096446430] [2021-03-11 00:00:10,258 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 [2021-03-11 00:00:10,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:00:10,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:10,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:10,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:10,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:10,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:10,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72345572] [2021-03-11 00:00:10,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:10,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:10,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:10,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:10,397 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:11,098 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-03-11 00:00:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:00:11,098 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:11,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:11,103 INFO L225 Difference]: With dead ends: 1078 [2021-03-11 00:00:11,103 INFO L226 Difference]: Without dead ends: 1078 [2021-03-11 00:00:11,104 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 464.2ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:00:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-03-11 00:00:11,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-03-11 00:00:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-03-11 00:00:11,117 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-03-11 00:00:11,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:11,117 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-03-11 00:00:11,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:11,118 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-03-11 00:00:11,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:11,120 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:11,120 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:11,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:11,341 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:11,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-03-11 00:00:11,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:11,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832928071] [2021-03-11 00:00:11,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:11,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832928071] [2021-03-11 00:00:11,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716478142] [2021-03-11 00:00:11,391 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 [2021-03-11 00:00:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:11,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:11,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:11,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:11,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:11,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372509264] [2021-03-11 00:00:11,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:11,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:11,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:11,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:11,521 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:12,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:12,177 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-03-11 00:00:12,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:00:12,178 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:12,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:12,182 INFO L225 Difference]: With dead ends: 951 [2021-03-11 00:00:12,182 INFO L226 Difference]: Without dead ends: 951 [2021-03-11 00:00:12,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 399.7ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:00:12,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-03-11 00:00:12,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-03-11 00:00:12,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:12,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-03-11 00:00:12,194 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-03-11 00:00:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:12,195 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-03-11 00:00:12,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:12,195 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-03-11 00:00:12,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:12,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:12,196 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:12,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:12,411 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:12,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:12,412 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-03-11 00:00:12,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:12,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998074741] [2021-03-11 00:00:12,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:12,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998074741] [2021-03-11 00:00:12,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926327013] [2021-03-11 00:00:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:12,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:00:12,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:12,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:12,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:00:12,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206388082] [2021-03-11 00:00:12,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:00:12,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:12,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:00:12,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:00:12,535 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-03-11 00:00:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:12,655 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-03-11 00:00:12,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:00:12,655 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-03-11 00:00:12,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:12,659 INFO L225 Difference]: With dead ends: 669 [2021-03-11 00:00:12,660 INFO L226 Difference]: Without dead ends: 663 [2021-03-11 00:00:12,660 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:12,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-03-11 00:00:12,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-03-11 00:00:12,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:12,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-03-11 00:00:12,671 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-03-11 00:00:12,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:12,672 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-03-11 00:00:12,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-03-11 00:00:12,672 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-03-11 00:00:12,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:12,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:12,674 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:12,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-11 00:00:12,887 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:12,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:12,888 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-03-11 00:00:12,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:12,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612177151] [2021-03-11 00:00:12,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:12,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612177151] [2021-03-11 00:00:12,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411525151] [2021-03-11 00:00:12,979 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:13,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:00:13,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:13,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:13,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:13,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:13,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:00:13,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586450278] [2021-03-11 00:00:13,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:13,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:13,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:13,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:13,076 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:13,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:13,274 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-03-11 00:00:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:00:13,274 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:13,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:13,277 INFO L225 Difference]: With dead ends: 710 [2021-03-11 00:00:13,277 INFO L226 Difference]: Without dead ends: 672 [2021-03-11 00:00:13,277 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 167.6ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:00:13,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-03-11 00:00:13,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-03-11 00:00:13,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-03-11 00:00:13,291 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-03-11 00:00:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:13,291 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-03-11 00:00:13,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:13,291 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-03-11 00:00:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:13,292 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:13,295 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:13,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:13,499 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:13,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:13,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-03-11 00:00:13,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:13,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394828629] [2021-03-11 00:00:13,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:13,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394828629] [2021-03-11 00:00:13,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618821946] [2021-03-11 00:00:13,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:00:13,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:00:13,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:13,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:00:13,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:13,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:13,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:00:13,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370956626] [2021-03-11 00:00:13,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:00:13,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:13,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:00:13,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:00:13,607 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-03-11 00:00:13,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:13,711 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-03-11 00:00:13,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:00:13,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-03-11 00:00:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:13,716 INFO L225 Difference]: With dead ends: 830 [2021-03-11 00:00:13,716 INFO L226 Difference]: Without dead ends: 830 [2021-03-11 00:00:13,716 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:13,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-03-11 00:00:13,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-03-11 00:00:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-03-11 00:00:13,732 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-03-11 00:00:13,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:13,732 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-03-11 00:00:13,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-03-11 00:00:13,732 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-03-11 00:00:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:13,733 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:13,734 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:13,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:13,951 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:13,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:13,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-03-11 00:00:13,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:13,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19981739] [2021-03-11 00:00:13,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:13,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19981739] [2021-03-11 00:00:13,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331140452] [2021-03-11 00:00:13,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:14,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:00:14,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:14,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:14,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:14,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:14,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:00:14,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491469607] [2021-03-11 00:00:14,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:00:14,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:14,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:00:14,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:00:14,070 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) 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) [2021-03-11 00:00:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:14,328 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-03-11 00:00:14,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:00:14,329 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) 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 24 [2021-03-11 00:00:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:14,333 INFO L225 Difference]: With dead ends: 1196 [2021-03-11 00:00:14,333 INFO L226 Difference]: Without dead ends: 1196 [2021-03-11 00:00:14,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:00:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-03-11 00:00:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-03-11 00:00:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-03-11 00:00:14,356 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-03-11 00:00:14,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:14,356 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-03-11 00:00:14,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) 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) [2021-03-11 00:00:14,356 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-03-11 00:00:14,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:14,357 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:14,358 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:14,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-11 00:00:14,571 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:14,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:14,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-03-11 00:00:14,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:14,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065973145] [2021-03-11 00:00:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:14,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065973145] [2021-03-11 00:00:14,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241881174] [2021-03-11 00:00:14,613 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 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 [2021-03-11 00:00:14,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:00:14,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:14,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:14,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:14,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:14,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:00:14,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274955939] [2021-03-11 00:00:14,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:00:14,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:14,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:00:14,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:00:14,714 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) 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) [2021-03-11 00:00:15,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:15,140 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-03-11 00:00:15,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:00:15,140 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) 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 24 [2021-03-11 00:00:15,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:15,145 INFO L225 Difference]: With dead ends: 1492 [2021-03-11 00:00:15,146 INFO L226 Difference]: Without dead ends: 1492 [2021-03-11 00:00:15,146 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:00:15,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-03-11 00:00:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-03-11 00:00:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-03-11 00:00:15,167 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-03-11 00:00:15,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:15,167 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-03-11 00:00:15,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) 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) [2021-03-11 00:00:15,167 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-03-11 00:00:15,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:15,168 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:15,168 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:15,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-11 00:00:15,383 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:15,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:15,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-03-11 00:00:15,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:15,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242558502] [2021-03-11 00:00:15,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:15,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242558502] [2021-03-11 00:00:15,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289861652] [2021-03-11 00:00:15,428 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:15,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:00:15,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:15,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:15,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:15,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:15,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:00:15,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473239497] [2021-03-11 00:00:15,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:15,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:15,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:15,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:15,546 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:15,784 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-03-11 00:00:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:00:15,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:15,790 INFO L225 Difference]: With dead ends: 1258 [2021-03-11 00:00:15,790 INFO L226 Difference]: Without dead ends: 1248 [2021-03-11 00:00:15,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:00:15,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-03-11 00:00:15,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-03-11 00:00:15,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-03-11 00:00:15,811 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-03-11 00:00:15,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:15,811 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-03-11 00:00:15,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:15,812 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-03-11 00:00:15,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:15,815 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:15,815 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:16,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-11 00:00:16,033 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:16,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:16,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-03-11 00:00:16,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:16,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836865850] [2021-03-11 00:00:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:16,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836865850] [2021-03-11 00:00:16,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690643907] [2021-03-11 00:00:16,080 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:16,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:00:16,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:16,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:16,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:16,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:16,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:00:16,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588809762] [2021-03-11 00:00:16,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:16,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:16,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:16,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:16,196 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:16,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:16,484 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-03-11 00:00:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:00:16,484 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:16,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:16,489 INFO L225 Difference]: With dead ends: 1329 [2021-03-11 00:00:16,489 INFO L226 Difference]: Without dead ends: 1329 [2021-03-11 00:00:16,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:00:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-03-11 00:00:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-03-11 00:00:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-03-11 00:00:16,509 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-03-11 00:00:16,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:16,510 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-03-11 00:00:16,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-03-11 00:00:16,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:16,512 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:16,512 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:16,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:16,725 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:16,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:16,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-03-11 00:00:16,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:16,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632094318] [2021-03-11 00:00:16,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:16,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632094318] [2021-03-11 00:00:16,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720666847] [2021-03-11 00:00:16,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:16,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:16,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:16,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:16,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:00:16,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61849102] [2021-03-11 00:00:16,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:00:16,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:16,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:00:16,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:00:16,856 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) 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) [2021-03-11 00:00:17,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:17,227 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-03-11 00:00:17,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:00:17,227 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) 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 24 [2021-03-11 00:00:17,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:17,232 INFO L225 Difference]: With dead ends: 1548 [2021-03-11 00:00:17,233 INFO L226 Difference]: Without dead ends: 1544 [2021-03-11 00:00:17,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:00:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-03-11 00:00:17,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-03-11 00:00:17,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:17,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-03-11 00:00:17,261 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-03-11 00:00:17,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:17,262 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-03-11 00:00:17,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) 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) [2021-03-11 00:00:17,262 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-03-11 00:00:17,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:17,264 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:17,264 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:17,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:17,480 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:17,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:17,480 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-03-11 00:00:17,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:17,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151367599] [2021-03-11 00:00:17,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:17,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151367599] [2021-03-11 00:00:17,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086098713] [2021-03-11 00:00:17,516 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:17,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:00:17,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:17,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:17,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:17,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:17,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704680513] [2021-03-11 00:00:17,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:17,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:17,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:17,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:17,631 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:18,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:18,416 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-03-11 00:00:18,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:00:18,416 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:18,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:18,426 INFO L225 Difference]: With dead ends: 2734 [2021-03-11 00:00:18,426 INFO L226 Difference]: Without dead ends: 2734 [2021-03-11 00:00:18,427 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 454.7ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:00:18,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-03-11 00:00:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-03-11 00:00:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-03-11 00:00:18,470 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-03-11 00:00:18,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:18,470 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-03-11 00:00:18,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:18,470 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-03-11 00:00:18,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:18,472 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:18,472 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:18,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:18,688 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:18,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:18,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-03-11 00:00:18,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:18,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479346301] [2021-03-11 00:00:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:18,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479346301] [2021-03-11 00:00:18,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502299330] [2021-03-11 00:00:18,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:00:18,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:00:18,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:18,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:18,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:18,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:18,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:18,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599295975] [2021-03-11 00:00:18,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:18,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:18,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:18,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:18,870 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:19,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:19,619 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-03-11 00:00:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:00:19,620 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:19,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:19,627 INFO L225 Difference]: With dead ends: 2693 [2021-03-11 00:00:19,627 INFO L226 Difference]: Without dead ends: 2693 [2021-03-11 00:00:19,627 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 473.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:00:19,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-03-11 00:00:19,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-03-11 00:00:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:19,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-03-11 00:00:19,659 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-03-11 00:00:19,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:19,659 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-03-11 00:00:19,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-03-11 00:00:19,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:19,661 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:19,661 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:19,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-03-11 00:00:19,878 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:19,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:19,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-03-11 00:00:19,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:19,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194274147] [2021-03-11 00:00:19,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:19,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194274147] [2021-03-11 00:00:19,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523261642] [2021-03-11 00:00:19,930 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:19,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:00:19,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:19,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:19,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:20,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:20,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:00:20,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652338937] [2021-03-11 00:00:20,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:00:20,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:20,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:00:20,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:00:20,030 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:20,748 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-03-11 00:00:20,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:00:20,748 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:20,770 INFO L225 Difference]: With dead ends: 2677 [2021-03-11 00:00:20,770 INFO L226 Difference]: Without dead ends: 2677 [2021-03-11 00:00:20,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 430.6ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:00:20,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-03-11 00:00:20,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-03-11 00:00:20,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:20,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-03-11 00:00:20,866 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-03-11 00:00:20,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:20,866 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-03-11 00:00:20,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:20,866 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-03-11 00:00:20,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:20,870 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:20,871 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:21,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-03-11 00:00:21,087 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:21,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:21,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-03-11 00:00:21,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:21,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310916303] [2021-03-11 00:00:21,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:21,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310916303] [2021-03-11 00:00:21,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665631507] [2021-03-11 00:00:21,127 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:21,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:00:21,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:21,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:21,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:21,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:21,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:00:21,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240061641] [2021-03-11 00:00:21,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:00:21,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:21,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:00:21,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:00:21,216 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:21,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:21,825 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-03-11 00:00:21,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:00:21,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:21,839 INFO L225 Difference]: With dead ends: 2474 [2021-03-11 00:00:21,839 INFO L226 Difference]: Without dead ends: 2470 [2021-03-11 00:00:21,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 347.5ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:00:21,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-03-11 00:00:21,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-03-11 00:00:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-03-11 00:00:21,870 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-03-11 00:00:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:21,870 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-03-11 00:00:21,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:21,870 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-03-11 00:00:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:21,872 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:21,872 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:22,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:22,080 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:22,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:22,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-03-11 00:00:22,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:22,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188833212] [2021-03-11 00:00:22,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:22,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188833212] [2021-03-11 00:00:22,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784322833] [2021-03-11 00:00:22,116 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:22,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:00:22,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:22,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:22,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:22,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:22,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:22,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402152088] [2021-03-11 00:00:22,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:22,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:22,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:22,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:22,217 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:22,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:22,873 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-03-11 00:00:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:00:22,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:22,879 INFO L225 Difference]: With dead ends: 2514 [2021-03-11 00:00:22,879 INFO L226 Difference]: Without dead ends: 2514 [2021-03-11 00:00:22,880 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 378.2ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:00:22,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-03-11 00:00:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-03-11 00:00:22,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-03-11 00:00:22,908 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-03-11 00:00:22,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:22,908 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-03-11 00:00:22,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:22,908 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-03-11 00:00:22,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:22,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:22,910 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:23,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-11 00:00:23,126 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:23,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:23,127 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-03-11 00:00:23,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:23,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796592656] [2021-03-11 00:00:23,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:23,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796592656] [2021-03-11 00:00:23,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425996491] [2021-03-11 00:00:23,164 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 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 [2021-03-11 00:00:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:23,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:23,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:23,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:23,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:23,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:23,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334850105] [2021-03-11 00:00:23,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:23,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:23,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:23,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:23,270 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:23,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:23,880 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-03-11 00:00:23,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:00:23,881 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:23,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:23,886 INFO L225 Difference]: With dead ends: 2332 [2021-03-11 00:00:23,886 INFO L226 Difference]: Without dead ends: 2328 [2021-03-11 00:00:23,887 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:00:23,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-03-11 00:00:23,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-03-11 00:00:23,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-03-11 00:00:23,912 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-03-11 00:00:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:23,912 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-03-11 00:00:23,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:23,913 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-03-11 00:00:23,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:23,914 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:23,914 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:24,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-11 00:00:24,131 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:24,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:24,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-03-11 00:00:24,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:24,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578014711] [2021-03-11 00:00:24,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:24,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578014711] [2021-03-11 00:00:24,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445885830] [2021-03-11 00:00:24,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:24,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:00:24,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:24,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:00:24,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:24,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:24,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:00:24,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788557298] [2021-03-11 00:00:24,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:00:24,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:24,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:00:24,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:00:24,249 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-03-11 00:00:24,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:24,318 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-03-11 00:00:24,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:00:24,318 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-03-11 00:00:24,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:24,321 INFO L225 Difference]: With dead ends: 929 [2021-03-11 00:00:24,322 INFO L226 Difference]: Without dead ends: 929 [2021-03-11 00:00:24,322 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:00:24,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-03-11 00:00:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-03-11 00:00:24,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-03-11 00:00:24,346 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-03-11 00:00:24,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:24,347 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-03-11 00:00:24,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-03-11 00:00:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-03-11 00:00:24,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:24,349 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:24,349 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:24,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:24,555 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:24,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:24,555 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-03-11 00:00:24,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:24,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491216245] [2021-03-11 00:00:24,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:24,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491216245] [2021-03-11 00:00:24,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912318605] [2021-03-11 00:00:24,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:24,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:00:24,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:24,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:24,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:24,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:24,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:00:24,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818865880] [2021-03-11 00:00:24,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:00:24,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:24,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:00:24,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:00:24,681 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:24,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:24,954 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-03-11 00:00:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:00:24,955 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:24,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:24,958 INFO L225 Difference]: With dead ends: 1555 [2021-03-11 00:00:24,958 INFO L226 Difference]: Without dead ends: 1555 [2021-03-11 00:00:24,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:00:24,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-03-11 00:00:24,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-03-11 00:00:24,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-03-11 00:00:24,977 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-03-11 00:00:24,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:24,977 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-03-11 00:00:24,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:24,977 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-03-11 00:00:24,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:24,979 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:24,979 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:25,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-11 00:00:25,191 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:25,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:25,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-03-11 00:00:25,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:25,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100397974] [2021-03-11 00:00:25,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:25,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100397974] [2021-03-11 00:00:25,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615495217] [2021-03-11 00:00:25,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:25,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:00:25,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:25,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:25,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:25,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:25,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:00:25,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25319479] [2021-03-11 00:00:25,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:00:25,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:25,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:00:25,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:00:25,305 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:25,562 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-03-11 00:00:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:00:25,562 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:25,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:25,566 INFO L225 Difference]: With dead ends: 1605 [2021-03-11 00:00:25,566 INFO L226 Difference]: Without dead ends: 1605 [2021-03-11 00:00:25,567 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:00:25,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-03-11 00:00:25,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-03-11 00:00:25,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:25,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-03-11 00:00:25,587 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-03-11 00:00:25,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:25,587 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-03-11 00:00:25,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:25,587 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-03-11 00:00:25,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:25,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:25,589 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:25,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:25,794 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:25,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:25,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-03-11 00:00:25,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:25,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183471799] [2021-03-11 00:00:25,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:25,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183471799] [2021-03-11 00:00:25,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796827720] [2021-03-11 00:00:25,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:25,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:00:25,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:25,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:25,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:25,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:25,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:00:25,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252279635] [2021-03-11 00:00:25,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:00:25,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:25,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:00:25,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:00:25,913 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:26,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:26,105 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-03-11 00:00:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:00:26,106 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:26,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:26,109 INFO L225 Difference]: With dead ends: 1524 [2021-03-11 00:00:26,109 INFO L226 Difference]: Without dead ends: 1520 [2021-03-11 00:00:26,110 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:00:26,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-03-11 00:00:26,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-03-11 00:00:26,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-03-11 00:00:26,135 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-03-11 00:00:26,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:26,135 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-03-11 00:00:26,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:26,135 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-03-11 00:00:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:26,137 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:26,137 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:26,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-03-11 00:00:26,354 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:26,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:26,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-03-11 00:00:26,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:26,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473694325] [2021-03-11 00:00:26,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:26,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473694325] [2021-03-11 00:00:26,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125217006] [2021-03-11 00:00:26,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:26,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:00:26,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:26,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:26,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:26,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:26,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:00:26,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550890475] [2021-03-11 00:00:26,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:00:26,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:26,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:00:26,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:00:26,460 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:26,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:26,680 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-03-11 00:00:26,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:00:26,681 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:26,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:26,684 INFO L225 Difference]: With dead ends: 1508 [2021-03-11 00:00:26,684 INFO L226 Difference]: Without dead ends: 1496 [2021-03-11 00:00:26,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:00:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-03-11 00:00:26,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-03-11 00:00:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:26,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-03-11 00:00:26,701 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-03-11 00:00:26,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:26,701 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-03-11 00:00:26,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:26,702 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-03-11 00:00:26,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:26,703 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:26,703 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:26,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:26,911 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:26,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:26,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-03-11 00:00:26,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:26,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614808153] [2021-03-11 00:00:26,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:26,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614808153] [2021-03-11 00:00:26,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722961256] [2021-03-11 00:00:26,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:26,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:00:26,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:26,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:26,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:27,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:27,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:27,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923267232] [2021-03-11 00:00:27,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:27,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:27,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:27,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:27,063 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:27,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:27,579 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-03-11 00:00:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:00:27,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:27,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:27,589 INFO L225 Difference]: With dead ends: 2412 [2021-03-11 00:00:27,589 INFO L226 Difference]: Without dead ends: 2412 [2021-03-11 00:00:27,590 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:00:27,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-03-11 00:00:27,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-03-11 00:00:27,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:27,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-03-11 00:00:27,618 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-03-11 00:00:27,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:27,618 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-03-11 00:00:27,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-03-11 00:00:27,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:27,620 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:27,620 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:27,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-03-11 00:00:27,837 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:27,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:27,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-03-11 00:00:27,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:27,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478967337] [2021-03-11 00:00:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:27,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478967337] [2021-03-11 00:00:27,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035966876] [2021-03-11 00:00:27,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:27,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:27,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:27,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:27,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:27,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998830313] [2021-03-11 00:00:27,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:27,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:27,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:27,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:27,982 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:28,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:28,496 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-03-11 00:00:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:00:28,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:28,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:28,501 INFO L225 Difference]: With dead ends: 2335 [2021-03-11 00:00:28,501 INFO L226 Difference]: Without dead ends: 2335 [2021-03-11 00:00:28,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 313.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:00:28,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-03-11 00:00:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-03-11 00:00:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:00:28,527 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:00:28,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:28,527 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:00:28,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:28,528 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:00:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:28,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:28,530 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:28,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:28,743 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:28,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-03-11 00:00:28,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:28,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940801673] [2021-03-11 00:00:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:28,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940801673] [2021-03-11 00:00:28,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035928179] [2021-03-11 00:00:28,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:28,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:00:28,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:28,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:28,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:28,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:28,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:00:28,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575268470] [2021-03-11 00:00:28,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:00:28,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:28,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:00:28,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:00:28,870 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:29,288 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-03-11 00:00:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:00:29,290 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:29,294 INFO L225 Difference]: With dead ends: 2285 [2021-03-11 00:00:29,294 INFO L226 Difference]: Without dead ends: 2285 [2021-03-11 00:00:29,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 254.3ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:00:29,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-03-11 00:00:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-03-11 00:00:29,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:29,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-03-11 00:00:29,319 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-03-11 00:00:29,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:29,319 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-03-11 00:00:29,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:29,319 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-03-11 00:00:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:29,321 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:29,321 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:29,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-03-11 00:00:29,523 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:29,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-03-11 00:00:29,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:29,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566605579] [2021-03-11 00:00:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:29,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566605579] [2021-03-11 00:00:29,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787378425] [2021-03-11 00:00:29,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:29,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:00:29,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:29,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:29,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:29,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:29,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:00:29,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256631195] [2021-03-11 00:00:29,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:00:29,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:29,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:00:29,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:00:29,644 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:30,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:30,003 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-03-11 00:00:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:00:30,004 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:30,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:30,008 INFO L225 Difference]: With dead ends: 2176 [2021-03-11 00:00:30,008 INFO L226 Difference]: Without dead ends: 2172 [2021-03-11 00:00:30,008 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:00:30,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-03-11 00:00:30,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-03-11 00:00:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:00:30,032 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:00:30,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:30,032 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:00:30,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:30,032 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:00:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:30,034 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:30,034 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:30,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:30,234 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:30,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:30,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-03-11 00:00:30,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:30,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588335268] [2021-03-11 00:00:30,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:30,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588335268] [2021-03-11 00:00:30,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932365418] [2021-03-11 00:00:30,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:30,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:00:30,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:30,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:30,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:30,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:30,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:30,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806343141] [2021-03-11 00:00:30,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:30,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:30,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:30,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:30,386 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:30,813 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-03-11 00:00:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:00:30,814 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:30,817 INFO L225 Difference]: With dead ends: 2199 [2021-03-11 00:00:30,818 INFO L226 Difference]: Without dead ends: 2199 [2021-03-11 00:00:30,818 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:00:30,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-03-11 00:00:30,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-03-11 00:00:30,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:30,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-03-11 00:00:30,846 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-03-11 00:00:30,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:30,847 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-03-11 00:00:30,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:30,847 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-03-11 00:00:30,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:30,848 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:30,849 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:31,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-03-11 00:00:31,063 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:31,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:31,064 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-03-11 00:00:31,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:31,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395503226] [2021-03-11 00:00:31,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:31,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395503226] [2021-03-11 00:00:31,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809173522] [2021-03-11 00:00:31,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:31,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:00:31,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:31,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:31,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:31,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:31,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:31,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764086141] [2021-03-11 00:00:31,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:31,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:31,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:31,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:31,231 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:31,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:31,553 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-03-11 00:00:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:00:31,554 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:31,556 INFO L225 Difference]: With dead ends: 2156 [2021-03-11 00:00:31,556 INFO L226 Difference]: Without dead ends: 2152 [2021-03-11 00:00:31,556 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:00:31,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-03-11 00:00:31,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-03-11 00:00:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:31,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:00:31,576 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:00:31,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:31,576 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:00:31,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:31,576 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:00:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:31,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:31,578 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:31,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-03-11 00:00:31,792 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:31,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:31,792 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-03-11 00:00:31,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:31,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192100340] [2021-03-11 00:00:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:31,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192100340] [2021-03-11 00:00:31,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409968691] [2021-03-11 00:00:31,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:31,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:00:31,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:31,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:31,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:31,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:31,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:00:31,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910394938] [2021-03-11 00:00:31,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:00:31,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:31,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:00:31,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:00:31,912 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:32,269 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-03-11 00:00:32,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:00:32,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:32,273 INFO L225 Difference]: With dead ends: 2097 [2021-03-11 00:00:32,273 INFO L226 Difference]: Without dead ends: 2097 [2021-03-11 00:00:32,274 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:00:32,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-03-11 00:00:32,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-03-11 00:00:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:32,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-03-11 00:00:32,297 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-03-11 00:00:32,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:32,297 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-03-11 00:00:32,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-03-11 00:00:32,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:32,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:32,299 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:32,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-11 00:00:32,500 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:32,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:32,500 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-03-11 00:00:32,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:32,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067870212] [2021-03-11 00:00:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:32,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067870212] [2021-03-11 00:00:32,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269289388] [2021-03-11 00:00:32,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:00:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:32,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:32,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:32,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:32,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:00:32,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836832621] [2021-03-11 00:00:32,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:00:32,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:32,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:00:32,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:00:32,628 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:32,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:32,906 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-03-11 00:00:32,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:00:32,906 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:32,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:32,910 INFO L225 Difference]: With dead ends: 1963 [2021-03-11 00:00:32,910 INFO L226 Difference]: Without dead ends: 1959 [2021-03-11 00:00:32,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:00:32,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-03-11 00:00:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-03-11 00:00:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-03-11 00:00:32,936 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-03-11 00:00:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:32,936 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-03-11 00:00:32,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-03-11 00:00:32,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:32,938 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:32,938 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:33,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:33,155 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:33,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:33,155 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-03-11 00:00:33,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:33,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751412172] [2021-03-11 00:00:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:33,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751412172] [2021-03-11 00:00:33,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075777218] [2021-03-11 00:00:33,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:33,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:00:33,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:33,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:33,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:33,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:33,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:00:33,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624231741] [2021-03-11 00:00:33,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:00:33,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:33,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:00:33,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:00:33,261 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:33,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:33,463 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-03-11 00:00:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:00:33,463 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:33,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:33,466 INFO L225 Difference]: With dead ends: 1728 [2021-03-11 00:00:33,466 INFO L226 Difference]: Without dead ends: 1716 [2021-03-11 00:00:33,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:00:33,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-03-11 00:00:33,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-03-11 00:00:33,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:33,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-03-11 00:00:33,486 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-03-11 00:00:33,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:33,486 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-03-11 00:00:33,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:33,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-03-11 00:00:33,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:33,488 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:33,488 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:33,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:33,703 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:33,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:33,704 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-03-11 00:00:33,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:33,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434807701] [2021-03-11 00:00:33,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:33,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434807701] [2021-03-11 00:00:33,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982978333] [2021-03-11 00:00:33,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:33,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:00:33,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:33,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:33,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:33,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:33,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:33,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820976120] [2021-03-11 00:00:33,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:33,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:33,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:33,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:33,830 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:34,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:34,160 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-03-11 00:00:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:00:34,160 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:34,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:34,163 INFO L225 Difference]: With dead ends: 1821 [2021-03-11 00:00:34,164 INFO L226 Difference]: Without dead ends: 1821 [2021-03-11 00:00:34,164 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 218.4ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:00:34,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-03-11 00:00:34,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-03-11 00:00:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-03-11 00:00:34,189 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-03-11 00:00:34,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:34,189 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-03-11 00:00:34,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-03-11 00:00:34,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:34,191 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:34,191 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:34,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:34,395 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:34,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:34,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-03-11 00:00:34,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:34,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024659312] [2021-03-11 00:00:34,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:34,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024659312] [2021-03-11 00:00:34,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359874952] [2021-03-11 00:00:34,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:34,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:00:34,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:34,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:34,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:34,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:34,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:34,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096812948] [2021-03-11 00:00:34,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:34,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:34,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:34,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:34,531 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:34,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:34,827 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-03-11 00:00:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:00:34,828 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:34,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:34,831 INFO L225 Difference]: With dead ends: 1790 [2021-03-11 00:00:34,831 INFO L226 Difference]: Without dead ends: 1786 [2021-03-11 00:00:34,831 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:00:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-03-11 00:00:34,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-03-11 00:00:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:34,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-03-11 00:00:34,853 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-03-11 00:00:34,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:34,853 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-03-11 00:00:34,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:34,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-03-11 00:00:34,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:34,855 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:34,855 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:35,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-03-11 00:00:35,072 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:35,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:35,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-03-11 00:00:35,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:35,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098940798] [2021-03-11 00:00:35,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:35,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098940798] [2021-03-11 00:00:35,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412152763] [2021-03-11 00:00:35,104 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:35,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:00:35,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:35,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:35,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:35,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:35,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:00:35,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224324507] [2021-03-11 00:00:35,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:00:35,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:35,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:00:35,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:00:35,181 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:35,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:35,380 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-03-11 00:00:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:00:35,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:35,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:35,383 INFO L225 Difference]: With dead ends: 1649 [2021-03-11 00:00:35,383 INFO L226 Difference]: Without dead ends: 1637 [2021-03-11 00:00:35,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:00:35,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-03-11 00:00:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-03-11 00:00:35,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:35,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-03-11 00:00:35,402 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-03-11 00:00:35,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:35,402 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-03-11 00:00:35,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:35,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-03-11 00:00:35,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:00:35,404 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:35,404 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:35,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:35,605 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:35,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-03-11 00:00:35,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:35,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531346470] [2021-03-11 00:00:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:35,908 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-11 00:00:36,048 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-11 00:00:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:36,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531346470] [2021-03-11 00:00:36,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657530134] [2021-03-11 00:00:36,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:36,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:00:36,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:36,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:00:36,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:36,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:36,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,688 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 33 treesize of output 19 [2021-03-11 00:00:36,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:36,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:36,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,697 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 28 treesize of output 16 [2021-03-11 00:00:36,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:36,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:36,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,707 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 26 treesize of output 13 [2021-03-11 00:00:36,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:36,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:36,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,717 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 33 treesize of output 19 [2021-03-11 00:00:36,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:36,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:36,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,726 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 21 treesize of output 13 [2021-03-11 00:00:36,726 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:36,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:36,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,734 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 28 treesize of output 16 [2021-03-11 00:00:36,735 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:36,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:36,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,745 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 28 treesize of output 16 [2021-03-11 00:00:36,746 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:36,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:36,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,755 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 28 treesize of output 16 [2021-03-11 00:00:36,756 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:36,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:36,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,763 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 33 treesize of output 19 [2021-03-11 00:00:36,764 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:36,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:36,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,771 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 30 treesize of output 16 [2021-03-11 00:00:36,772 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:36,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:36,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,780 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 21 treesize of output 13 [2021-03-11 00:00:36,781 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:36,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:36,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,788 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 30 treesize of output 13 [2021-03-11 00:00:36,790 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:36,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:36,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,797 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 30 treesize of output 16 [2021-03-11 00:00:36,798 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:36,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:36,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,804 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 30 treesize of output 13 [2021-03-11 00:00:36,805 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:36,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:36,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:36,811 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 33 treesize of output 19 [2021-03-11 00:00:36,812 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:36,832 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-03-11 00:00:36,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:00:36,834 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-03-11 00:00:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:36,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:36,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:00:36,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588593390] [2021-03-11 00:00:36,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:00:36,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:36,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:00:36,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:00:36,863 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:37,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:37,713 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-03-11 00:00:37,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:00:37,713 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:00:37,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:37,716 INFO L225 Difference]: With dead ends: 1517 [2021-03-11 00:00:37,716 INFO L226 Difference]: Without dead ends: 1502 [2021-03-11 00:00:37,716 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1191.4ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:00:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-03-11 00:00:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-03-11 00:00:37,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-03-11 00:00:37,735 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-03-11 00:00:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:37,735 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-03-11 00:00:37,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-03-11 00:00:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:00:37,738 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:37,738 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:37,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:37,939 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:37,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:37,939 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-03-11 00:00:37,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:37,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494909093] [2021-03-11 00:00:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:38,228 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-11 00:00:38,345 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-11 00:00:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:38,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494909093] [2021-03-11 00:00:38,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062891518] [2021-03-11 00:00:38,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:38,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:00:38,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:38,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:00:38,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:38,979 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-11 00:00:39,045 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_3, v_prenex_5]} [2021-03-11 00:00:39,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:39,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:00:39,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:39,183 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-11 00:00:39,183 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-03-11 00:00:39,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:39,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:39,189 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 23 treesize of output 13 [2021-03-11 00:00:39,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:39,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:39,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:39,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:39,222 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 23 treesize of output 13 [2021-03-11 00:00:39,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:39,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:39,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:00:39,247 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:15 [2021-03-11 00:00:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:39,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:39,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:00:39,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685411729] [2021-03-11 00:00:39,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:00:39,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:39,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:00:39,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:00:39,291 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:40,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:40,472 INFO L93 Difference]: Finished difference Result 1714 states and 5519 transitions. [2021-03-11 00:00:40,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:00:40,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:00:40,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:40,476 INFO L225 Difference]: With dead ends: 1714 [2021-03-11 00:00:40,476 INFO L226 Difference]: Without dead ends: 1684 [2021-03-11 00:00:40,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1504.7ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:00:40,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-03-11 00:00:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1168. [2021-03-11 00:00:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.348757497857755) internal successors, (3908), 1167 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3908 transitions. [2021-03-11 00:00:40,495 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3908 transitions. Word has length 26 [2021-03-11 00:00:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:40,496 INFO L480 AbstractCegarLoop]: Abstraction has 1168 states and 3908 transitions. [2021-03-11 00:00:40,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3908 transitions. [2021-03-11 00:00:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:00:40,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:40,498 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] [2021-03-11 00:00:40,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:40,699 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:40,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:40,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-03-11 00:00:40,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:40,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959164188] [2021-03-11 00:00:40,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:41,058 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-03-11 00:00:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:41,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959164188] [2021-03-11 00:00:41,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051529303] [2021-03-11 00:00:41,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:41,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:00:41,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:41,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:00:41,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:41,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:41,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:41,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:41,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:41,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:41,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:41,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:00:41,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:41,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:41,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:41,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:41,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:41,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:41,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:41,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:00:41,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:41,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:41,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:41,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:41,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:41,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:41,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:41,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:00:41,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:41,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:41,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:41,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:41,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:41,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:41,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:00:42,002 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:42,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:00:42,014 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:42,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:00:42,027 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:42,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:00:42,038 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:42,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:00:42,049 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:42,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:00:42,069 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:42,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:00:42,080 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:42,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:00:42,092 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:42,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:00:42,103 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:42,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:00:42,115 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:42,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:00:42,126 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:42,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:42,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:42,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:00:42,134 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:42,158 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-03-11 00:00:42,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:00:42,160 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-03-11 00:00:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:42,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:42,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:00:42,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772890360] [2021-03-11 00:00:42,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:00:42,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:42,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:00:42,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:00:42,191 INFO L87 Difference]: Start difference. First operand 1168 states and 3908 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:43,789 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2021-03-11 00:00:44,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:44,240 INFO L93 Difference]: Finished difference Result 1659 states and 5345 transitions. [2021-03-11 00:00:44,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:00:44,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:00:44,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:44,243 INFO L225 Difference]: With dead ends: 1659 [2021-03-11 00:00:44,243 INFO L226 Difference]: Without dead ends: 1644 [2021-03-11 00:00:44,244 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2116.8ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:00:44,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-03-11 00:00:44,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1198. [2021-03-11 00:00:44,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.3333333333333335) internal successors, (3990), 1197 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:44,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3990 transitions. [2021-03-11 00:00:44,263 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3990 transitions. Word has length 26 [2021-03-11 00:00:44,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:44,264 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 3990 transitions. [2021-03-11 00:00:44,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:44,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3990 transitions. [2021-03-11 00:00:44,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:00:44,266 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:44,266 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:44,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:44,471 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:44,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-03-11 00:00:44,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:44,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799384120] [2021-03-11 00:00:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:44,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799384120] [2021-03-11 00:00:44,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503980420] [2021-03-11 00:00:44,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:44,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:00:44,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:44,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:00:44,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:45,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:45,250 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:00:45,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:00:45,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:45,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:45,263 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:00:45,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:00:45,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:45,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:45,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:45,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-03-11 00:00:45,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:45,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:45,291 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:00:45,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:00:45,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:45,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:45,304 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:00:45,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:00:45,306 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:45,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:45,320 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:00:45,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:00:45,322 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:45,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:45,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:45,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:00:45,340 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:45,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:45,352 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:00:45,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:00:45,353 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:45,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:45,366 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:00:45,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:00:45,367 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:45,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:45,378 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:00:45,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:00:45,380 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:45,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:45,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:45,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:00:45,402 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:45,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:45,416 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:00:45,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:00:45,418 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:45,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:45,431 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:00:45,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:00:45,432 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:45,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:45,443 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:00:45,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:00:45,446 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:45,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:45,459 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:00:45,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-03-11 00:00:45,472 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:45,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:45,482 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:00:45,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:00:45,483 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:45,570 INFO L628 ElimStorePlain]: treesize reduction 51, result has 60.5 percent of original size [2021-03-11 00:00:45,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:00:45,572 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-03-11 00:00:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:45,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:45,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:00:45,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982246170] [2021-03-11 00:00:45,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:00:45,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:45,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:00:45,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:00:45,668 INFO L87 Difference]: Start difference. First operand 1198 states and 3990 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:46,253 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-03-11 00:00:46,552 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-03-11 00:00:46,708 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-03-11 00:00:47,220 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-03-11 00:00:47,437 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-03-11 00:00:47,825 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-03-11 00:00:47,988 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-03-11 00:00:48,418 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-03-11 00:00:48,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:48,755 INFO L93 Difference]: Finished difference Result 1861 states and 5918 transitions. [2021-03-11 00:00:48,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:00:48,756 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-03-11 00:00:48,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:48,759 INFO L225 Difference]: With dead ends: 1861 [2021-03-11 00:00:48,759 INFO L226 Difference]: Without dead ends: 1846 [2021-03-11 00:00:48,760 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2818.2ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:00:48,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-03-11 00:00:48,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1207. [2021-03-11 00:00:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 3.341625207296849) internal successors, (4030), 1206 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 4030 transitions. [2021-03-11 00:00:48,783 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 4030 transitions. Word has length 26 [2021-03-11 00:00:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:48,783 INFO L480 AbstractCegarLoop]: Abstraction has 1207 states and 4030 transitions. [2021-03-11 00:00:48,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 4030 transitions. [2021-03-11 00:00:48,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:00:48,786 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:48,786 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] [2021-03-11 00:00:48,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-03-11 00:00:48,986 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:48,987 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-03-11 00:00:48,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:48,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721480078] [2021-03-11 00:00:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:49,340 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-03-11 00:00:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:49,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721480078] [2021-03-11 00:00:49,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917936326] [2021-03-11 00:00:49,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:00:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:49,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:00:49,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:50,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:00:50,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:50,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:00:50,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:50,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:00:50,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:50,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:00:50,156 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:50,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:00:50,168 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:50,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:00:50,179 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:50,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:00:50,190 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:50,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:00:50,203 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:50,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:00:50,213 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:50,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:00:50,225 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:50,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:00:50,235 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:50,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:00:50,246 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:50,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:00:50,256 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:50,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:00:50,268 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:50,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:50,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:50,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:00:50,274 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:50,295 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-03-11 00:00:50,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:00:50,296 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-03-11 00:00:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:50,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:50,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:00:50,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552815661] [2021-03-11 00:00:50,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:00:50,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:50,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:00:50,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:00:50,324 INFO L87 Difference]: Start difference. First operand 1207 states and 4030 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:51,572 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2021-03-11 00:00:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:53,593 INFO L93 Difference]: Finished difference Result 1906 states and 6069 transitions. [2021-03-11 00:00:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:00:53,593 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:00:53,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:53,596 INFO L225 Difference]: With dead ends: 1906 [2021-03-11 00:00:53,596 INFO L226 Difference]: Without dead ends: 1891 [2021-03-11 00:00:53,597 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3175.4ms TimeCoverageRelationStatistics Valid=500, Invalid=2362, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:00:53,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-03-11 00:00:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1218. [2021-03-11 00:00:53,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 3.3475760065735414) internal successors, (4074), 1217 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:53,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 4074 transitions. [2021-03-11 00:00:53,618 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 4074 transitions. Word has length 26 [2021-03-11 00:00:53,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:53,619 INFO L480 AbstractCegarLoop]: Abstraction has 1218 states and 4074 transitions. [2021-03-11 00:00:53,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:53,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 4074 transitions. [2021-03-11 00:00:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:00:53,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:53,621 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] [2021-03-11 00:00:53,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:53,821 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:53,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:53,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-03-11 00:00:53,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:53,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534267445] [2021-03-11 00:00:53,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:54,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534267445] [2021-03-11 00:00:54,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344319431] [2021-03-11 00:00:54,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:54,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:00:54,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:54,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:00:54,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:55,020 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-03-11 00:00:55,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-03-11 00:00:55,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:55,086 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-03-11 00:00:55,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 47 [2021-03-11 00:00:55,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:55,122 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:00:55,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-03-11 00:00:55,123 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:55,164 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-03-11 00:00:55,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:00:55,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:55,220 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-03-11 00:00:55,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 47 [2021-03-11 00:00:55,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:55,254 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:00:55,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-03-11 00:00:55,255 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:55,309 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-03-11 00:00:55,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-03-11 00:00:55,318 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:55,376 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-03-11 00:00:55,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-03-11 00:00:55,386 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:55,432 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-03-11 00:00:55,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:00:55,435 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:55,488 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-03-11 00:00:55,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 45 [2021-03-11 00:00:55,502 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:55,526 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:00:55,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-03-11 00:00:55,527 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:55,576 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-03-11 00:00:55,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-03-11 00:00:55,587 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:55,609 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:00:55,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 1 [2021-03-11 00:00:55,610 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:55,666 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-03-11 00:00:55,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 40 [2021-03-11 00:00:55,686 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:55,728 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-03-11 00:00:55,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-03-11 00:00:55,739 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:55,775 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-03-11 00:00:55,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 40 [2021-03-11 00:00:55,783 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:56,102 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2021-03-11 00:00:56,102 INFO L628 ElimStorePlain]: treesize reduction 288, result has 50.2 percent of original size [2021-03-11 00:00:56,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:00:56,117 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:833, output treesize:341 [2021-03-11 00:00:56,362 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-03-11 00:00:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:56,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:56,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-11 00:00:56,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72589487] [2021-03-11 00:00:56,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:00:56,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:56,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:00:56,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:00:56,563 INFO L87 Difference]: Start difference. First operand 1218 states and 4074 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:58,402 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-03-11 00:00:58,675 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-03-11 00:00:58,820 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-11 00:00:59,211 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-03-11 00:00:59,703 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-03-11 00:01:00,139 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2021-03-11 00:01:00,518 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 65 [2021-03-11 00:01:00,654 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-11 00:01:00,802 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-11 00:01:01,237 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2021-03-11 00:01:01,728 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2021-03-11 00:01:01,932 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 38 [2021-03-11 00:01:02,121 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-03-11 00:01:02,329 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-03-11 00:01:02,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:02,569 INFO L93 Difference]: Finished difference Result 2524 states and 7752 transitions. [2021-03-11 00:01:02,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-11 00:01:02,569 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:02,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:02,573 INFO L225 Difference]: With dead ends: 2524 [2021-03-11 00:01:02,573 INFO L226 Difference]: Without dead ends: 2479 [2021-03-11 00:01:02,574 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 6017.6ms TimeCoverageRelationStatistics Valid=695, Invalid=3727, Unknown=0, NotChecked=0, Total=4422 [2021-03-11 00:01:02,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2021-03-11 00:01:02,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 1393. [2021-03-11 00:01:02,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 3.317528735632184) internal successors, (4618), 1392 states have internal predecessors, (4618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 4618 transitions. [2021-03-11 00:01:02,599 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 4618 transitions. Word has length 26 [2021-03-11 00:01:02,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:02,599 INFO L480 AbstractCegarLoop]: Abstraction has 1393 states and 4618 transitions. [2021-03-11 00:01:02,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:02,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 4618 transitions. [2021-03-11 00:01:02,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:02,602 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:02,602 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:02,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-03-11 00:01:02,802 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:02,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:02,803 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-03-11 00:01:02,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:02,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095770994] [2021-03-11 00:01:02,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:03,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095770994] [2021-03-11 00:01:03,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615470363] [2021-03-11 00:01:03,048 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:01:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:03,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:01:03,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:03,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:03,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,560 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 26 treesize of output 13 [2021-03-11 00:01:03,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:03,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:03,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,568 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 28 treesize of output 16 [2021-03-11 00:01:03,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:03,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:03,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,576 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 33 treesize of output 19 [2021-03-11 00:01:03,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:03,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:03,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,585 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 30 treesize of output 13 [2021-03-11 00:01:03,586 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:03,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:03,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,599 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 30 treesize of output 16 [2021-03-11 00:01:03,600 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:03,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:03,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,608 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 28 treesize of output 16 [2021-03-11 00:01:03,609 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:03,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:03,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,617 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 28 treesize of output 16 [2021-03-11 00:01:03,618 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:03,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:03,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,626 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 30 treesize of output 13 [2021-03-11 00:01:03,627 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:03,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:03,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,635 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 28 treesize of output 16 [2021-03-11 00:01:03,636 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:03,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:03,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,643 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 33 treesize of output 19 [2021-03-11 00:01:03,644 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:03,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:03,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,652 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 21 treesize of output 13 [2021-03-11 00:01:03,653 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:03,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:03,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,661 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 33 treesize of output 19 [2021-03-11 00:01:03,663 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:03,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:03,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,672 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 33 treesize of output 19 [2021-03-11 00:01:03,673 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:03,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:03,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,680 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 30 treesize of output 16 [2021-03-11 00:01:03,681 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:03,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:03,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:03,686 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 21 treesize of output 13 [2021-03-11 00:01:03,686 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:03,709 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-03-11 00:01:03,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:01:03,711 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-03-11 00:01:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:03,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:03,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:01:03,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130871394] [2021-03-11 00:01:03,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:01:03,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:03,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:01:03,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:01:03,743 INFO L87 Difference]: Start difference. First operand 1393 states and 4618 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:04,324 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-11 00:01:04,823 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-03-11 00:01:05,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:05,018 INFO L93 Difference]: Finished difference Result 1965 states and 6287 transitions. [2021-03-11 00:01:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:01:05,018 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:05,022 INFO L225 Difference]: With dead ends: 1965 [2021-03-11 00:01:05,022 INFO L226 Difference]: Without dead ends: 1935 [2021-03-11 00:01:05,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1260.0ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:01:05,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2021-03-11 00:01:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1434. [2021-03-11 00:01:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 3.319609211444522) internal successors, (4757), 1433 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 4757 transitions. [2021-03-11 00:01:05,045 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 4757 transitions. Word has length 26 [2021-03-11 00:01:05,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:05,046 INFO L480 AbstractCegarLoop]: Abstraction has 1434 states and 4757 transitions. [2021-03-11 00:01:05,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:05,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 4757 transitions. [2021-03-11 00:01:05,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:05,048 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:05,048 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:05,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:05,249 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:05,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:05,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-03-11 00:01:05,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:05,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736538229] [2021-03-11 00:01:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:05,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736538229] [2021-03-11 00:01:05,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281930185] [2021-03-11 00:01:05,596 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:05,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:01:05,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:05,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:01:05,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:05,995 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:01:06,265 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_9, A, v_prenex_13, v_prenex_11, v_prenex_7], 3=[v_prenex_19, v_prenex_17, v_prenex_15]} [2021-03-11 00:01:06,300 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:01:06,300 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 27 [2021-03-11 00:01:06,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:06,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:06,328 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 35 [2021-03-11 00:01:06,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:06,756 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 133 [2021-03-11 00:01:06,756 INFO L628 ElimStorePlain]: treesize reduction 151, result has 71.7 percent of original size [2021-03-11 00:01:06,781 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:01:06,782 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:01:06,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:06,966 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-03-11 00:01:06,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:06,996 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:01:06,996 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:01:06,998 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,190 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-03-11 00:01:07,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:07,217 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:01:07,217 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:01:07,222 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,393 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-03-11 00:01:07,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:07,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:07,420 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:01:07,423 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,436 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:01:07,436 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:01:07,438 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,740 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 113 [2021-03-11 00:01:07,741 INFO L628 ElimStorePlain]: treesize reduction 21, result has 93.4 percent of original size [2021-03-11 00:01:07,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,765 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-03-11 00:01:07,765 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-03-11 00:01:07,767 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,910 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-03-11 00:01:07,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:07,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,935 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:01:07,935 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-03-11 00:01:07,943 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:08,077 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-11 00:01:08,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:08,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:08,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:08,108 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-03-11 00:01:08,114 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:08,241 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-11 00:01:08,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:08,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:01:08,263 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:565, output treesize:421 [2021-03-11 00:01:08,579 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-03-11 00:01:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:08,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:08,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:01:08,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596809181] [2021-03-11 00:01:08,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:01:08,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:08,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:01:08,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:01:08,711 INFO L87 Difference]: Start difference. First operand 1434 states and 4757 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:09,390 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-03-11 00:01:09,806 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-03-11 00:01:10,024 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-03-11 00:01:10,185 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 36 [2021-03-11 00:01:10,517 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2021-03-11 00:01:10,812 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-03-11 00:01:10,986 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-11 00:01:11,202 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:01:11,411 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-03-11 00:01:11,634 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-03-11 00:01:11,851 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2021-03-11 00:01:12,366 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-03-11 00:01:12,970 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 77 [2021-03-11 00:01:13,262 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 65 [2021-03-11 00:01:13,544 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2021-03-11 00:01:13,839 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-11 00:01:14,461 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 76 [2021-03-11 00:01:14,982 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 28 [2021-03-11 00:01:15,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:15,254 INFO L93 Difference]: Finished difference Result 2396 states and 7465 transitions. [2021-03-11 00:01:15,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:01:15,255 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-03-11 00:01:15,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:15,260 INFO L225 Difference]: With dead ends: 2396 [2021-03-11 00:01:15,260 INFO L226 Difference]: Without dead ends: 2351 [2021-03-11 00:01:15,261 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 6410.2ms TimeCoverageRelationStatistics Valid=443, Invalid=2313, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:01:15,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-03-11 00:01:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1453. [2021-03-11 00:01:15,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.3236914600550964) internal successors, (4826), 1452 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:15,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 4826 transitions. [2021-03-11 00:01:15,291 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 4826 transitions. Word has length 26 [2021-03-11 00:01:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:15,291 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 4826 transitions. [2021-03-11 00:01:15,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 4826 transitions. [2021-03-11 00:01:15,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:15,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:15,294 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:15,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-03-11 00:01:15,495 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:15,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:15,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-03-11 00:01:15,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:15,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402351821] [2021-03-11 00:01:15,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:15,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:15,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402351821] [2021-03-11 00:01:15,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490884142] [2021-03-11 00:01:15,783 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:15,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:01:15,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:15,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:01:15,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:16,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,349 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 30 treesize of output 16 [2021-03-11 00:01:16,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,359 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 28 treesize of output 16 [2021-03-11 00:01:16,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,368 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 33 treesize of output 19 [2021-03-11 00:01:16,369 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,377 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 33 treesize of output 19 [2021-03-11 00:01:16,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,385 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 28 treesize of output 16 [2021-03-11 00:01:16,386 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,394 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 21 treesize of output 13 [2021-03-11 00:01:16,397 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,404 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 28 treesize of output 16 [2021-03-11 00:01:16,406 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,413 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 30 treesize of output 13 [2021-03-11 00:01:16,415 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,423 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 28 treesize of output 16 [2021-03-11 00:01:16,424 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,433 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 33 treesize of output 19 [2021-03-11 00:01:16,433 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,441 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 30 treesize of output 13 [2021-03-11 00:01:16,442 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,450 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 30 treesize of output 16 [2021-03-11 00:01:16,451 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,458 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 33 treesize of output 19 [2021-03-11 00:01:16,459 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,465 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 21 treesize of output 13 [2021-03-11 00:01:16,466 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:16,471 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 26 treesize of output 13 [2021-03-11 00:01:16,472 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,495 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-03-11 00:01:16,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:01:16,497 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-03-11 00:01:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:16,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:16,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:01:16,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439000134] [2021-03-11 00:01:16,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:01:16,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:16,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:01:16,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:01:16,525 INFO L87 Difference]: Start difference. First operand 1453 states and 4826 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:17,951 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-03-11 00:01:18,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:18,156 INFO L93 Difference]: Finished difference Result 2267 states and 7232 transitions. [2021-03-11 00:01:18,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:01:18,157 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:18,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:18,161 INFO L225 Difference]: With dead ends: 2267 [2021-03-11 00:01:18,161 INFO L226 Difference]: Without dead ends: 2252 [2021-03-11 00:01:18,161 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1591.1ms TimeCoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:01:18,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2021-03-11 00:01:18,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 1468. [2021-03-11 00:01:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.3231083844580778) internal successors, (4875), 1467 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:18,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4875 transitions. [2021-03-11 00:01:18,188 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4875 transitions. Word has length 26 [2021-03-11 00:01:18,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:18,189 INFO L480 AbstractCegarLoop]: Abstraction has 1468 states and 4875 transitions. [2021-03-11 00:01:18,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:18,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4875 transitions. [2021-03-11 00:01:18,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:18,191 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:18,191 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:18,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:18,392 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:18,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1130404249, now seen corresponding path program 10 times [2021-03-11 00:01:18,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:18,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865518221] [2021-03-11 00:01:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:18,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865518221] [2021-03-11 00:01:18,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51879732] [2021-03-11 00:01:18,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:18,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:01:18,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:18,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:01:18,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:19,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:19,088 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:19,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:19,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:19,103 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:19,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:01:19,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:19,120 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:19,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:01:19,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:19,137 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:19,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:01:19,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:19,155 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:19,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:01:19,157 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:19,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:19,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:01:19,176 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:19,191 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-03-11 00:01:19,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 19 [2021-03-11 00:01:19,193 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:19,204 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:19,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:19,205 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:19,217 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:19,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:19,218 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:19,230 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:19,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:19,231 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:19,243 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:19,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:01:19,245 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:19,257 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:19,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:01:19,258 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:19,269 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:19,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:19,270 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:19,281 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:19,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:19,282 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:19,293 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:19,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:19,294 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:19,302 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:19,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:19,303 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,424 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-11 00:01:19,424 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.4 percent of original size [2021-03-11 00:01:19,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:01:19,427 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:91 [2021-03-11 00:01:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:19,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:19,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:01:19,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724144525] [2021-03-11 00:01:19,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:01:19,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:19,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:01:19,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:01:19,531 INFO L87 Difference]: Start difference. First operand 1468 states and 4875 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:21,049 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-03-11 00:01:21,447 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-03-11 00:01:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:21,652 INFO L93 Difference]: Finished difference Result 2259 states and 7312 transitions. [2021-03-11 00:01:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:01:21,652 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:21,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:21,656 INFO L225 Difference]: With dead ends: 2259 [2021-03-11 00:01:21,656 INFO L226 Difference]: Without dead ends: 2244 [2021-03-11 00:01:21,657 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1804.0ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:01:21,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-03-11 00:01:21,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1468. [2021-03-11 00:01:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.3231083844580778) internal successors, (4875), 1467 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:21,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4875 transitions. [2021-03-11 00:01:21,684 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4875 transitions. Word has length 26 [2021-03-11 00:01:21,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:21,684 INFO L480 AbstractCegarLoop]: Abstraction has 1468 states and 4875 transitions. [2021-03-11 00:01:21,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4875 transitions. [2021-03-11 00:01:21,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:21,687 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:21,687 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:21,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:21,888 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:21,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:21,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1060173529, now seen corresponding path program 11 times [2021-03-11 00:01:21,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:21,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440992949] [2021-03-11 00:01:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:22,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440992949] [2021-03-11 00:01:22,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546891376] [2021-03-11 00:01:22,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:22,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:01:22,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:22,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:01:22,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:22,734 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:01:23,061 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-03-11 00:01:23,149 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_29, v_prenex_28]} [2021-03-11 00:01:23,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:23,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:01:23,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:23,283 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-03-11 00:01:23,284 INFO L628 ElimStorePlain]: treesize reduction 50, result has 70.1 percent of original size [2021-03-11 00:01:23,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:23,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:23,289 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 23 treesize of output 13 [2021-03-11 00:01:23,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:23,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:23,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:23,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:23,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:23,348 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 30 treesize of output 16 [2021-03-11 00:01:23,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:23,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:23,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:01:23,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:23,409 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-03-11 00:01:23,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:01:23,412 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:181, output treesize:32 [2021-03-11 00:01:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:23,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:23,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:01:23,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248701342] [2021-03-11 00:01:23,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:01:23,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:23,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:01:23,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:01:23,466 INFO L87 Difference]: Start difference. First operand 1468 states and 4875 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:24,159 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-11 00:01:24,527 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-03-11 00:01:24,696 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-11 00:01:25,005 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-11 00:01:25,696 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:01:26,221 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-03-11 00:01:26,482 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-03-11 00:01:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:26,874 INFO L93 Difference]: Finished difference Result 2357 states and 7501 transitions. [2021-03-11 00:01:26,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:01:26,875 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-03-11 00:01:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:26,879 INFO L225 Difference]: With dead ends: 2357 [2021-03-11 00:01:26,879 INFO L226 Difference]: Without dead ends: 2312 [2021-03-11 00:01:26,879 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 3576.9ms TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:01:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-03-11 00:01:26,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1490. [2021-03-11 00:01:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 3.333109469442579) internal successors, (4963), 1489 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 4963 transitions. [2021-03-11 00:01:26,907 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 4963 transitions. Word has length 26 [2021-03-11 00:01:26,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:26,907 INFO L480 AbstractCegarLoop]: Abstraction has 1490 states and 4963 transitions. [2021-03-11 00:01:26,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:26,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 4963 transitions. [2021-03-11 00:01:26,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:26,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:26,910 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:27,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable703 [2021-03-11 00:01:27,110 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:27,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:27,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1617260987, now seen corresponding path program 12 times [2021-03-11 00:01:27,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:27,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885806400] [2021-03-11 00:01:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:27,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885806400] [2021-03-11 00:01:27,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38834204] [2021-03-11 00:01:27,490 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:27,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:01:27,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:27,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:01:27,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:27,893 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:01:28,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:28,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:28,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:01:28,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:28,446 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 120 [2021-03-11 00:01:28,447 INFO L628 ElimStorePlain]: treesize reduction 120, result has 75.1 percent of original size [2021-03-11 00:01:28,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:28,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:28,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:01:28,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:28,649 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-11 00:01:28,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:28,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:28,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:28,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:01:28,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:28,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:28,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:28,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:01:28,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:29,010 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 107 [2021-03-11 00:01:29,011 INFO L628 ElimStorePlain]: treesize reduction 18, result has 94.2 percent of original size [2021-03-11 00:01:29,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:29,026 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:29,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:01:29,029 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:29,165 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-03-11 00:01:29,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:29,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:29,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:29,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:01:29,187 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:29,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:29,202 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:29,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:01:29,203 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:29,314 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-11 00:01:29,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:29,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:29,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:29,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:01:29,333 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:29,440 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-11 00:01:29,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:29,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:29,456 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:29,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:01:29,458 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:29,559 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-11 00:01:29,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:29,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:29,573 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:29,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:01:29,575 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:29,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:29,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:01:29,678 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:503, output treesize:150 [2021-03-11 00:01:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:29,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:29,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:01:29,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071623736] [2021-03-11 00:01:29,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:01:29,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:29,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:01:29,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:01:29,833 INFO L87 Difference]: Start difference. First operand 1490 states and 4963 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:31,497 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:01:31,693 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:01:32,106 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-03-11 00:01:32,520 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-03-11 00:01:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:32,801 INFO L93 Difference]: Finished difference Result 2596 states and 8270 transitions. [2021-03-11 00:01:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:01:32,802 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:32,806 INFO L225 Difference]: With dead ends: 2596 [2021-03-11 00:01:32,807 INFO L226 Difference]: Without dead ends: 2566 [2021-03-11 00:01:32,807 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 2974.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1282, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:01:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2021-03-11 00:01:32,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 1488. [2021-03-11 00:01:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 3.3375924680564895) internal successors, (4963), 1487 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:32,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 4963 transitions. [2021-03-11 00:01:32,838 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 4963 transitions. Word has length 26 [2021-03-11 00:01:32,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:32,838 INFO L480 AbstractCegarLoop]: Abstraction has 1488 states and 4963 transitions. [2021-03-11 00:01:32,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 4963 transitions. [2021-03-11 00:01:32,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:32,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:32,841 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] [2021-03-11 00:01:33,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:33,042 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:33,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:33,042 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-03-11 00:01:33,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:33,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768692889] [2021-03-11 00:01:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:33,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768692889] [2021-03-11 00:01:33,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336711531] [2021-03-11 00:01:33,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:33,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:01:33,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:33,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:01:33,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:33,858 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:01:34,112 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-03-11 00:01:34,532 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 83 [2021-03-11 00:01:34,743 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_61, v_prenex_65], 6=[A, v_prenex_63]} [2021-03-11 00:01:34,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:34,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:34,752 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 21 treesize of output 13 [2021-03-11 00:01:34,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:34,918 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-03-11 00:01:34,919 INFO L628 ElimStorePlain]: treesize reduction 151, result has 44.9 percent of original size [2021-03-11 00:01:34,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:34,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:34,926 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 21 treesize of output 13 [2021-03-11 00:01:34,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:34,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:34,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:34,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:34,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:34,984 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 23 treesize of output 13 [2021-03-11 00:01:34,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:35,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:35,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:35,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:35,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:35,036 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 23 treesize of output 13 [2021-03-11 00:01:35,038 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:35,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:35,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:01:35,077 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:314, output treesize:29 [2021-03-11 00:01:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:35,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:35,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:01:35,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406235771] [2021-03-11 00:01:35,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:01:35,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:35,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:01:35,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:01:35,130 INFO L87 Difference]: Start difference. First operand 1488 states and 4963 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:35,710 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-03-11 00:01:36,295 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-03-11 00:01:36,641 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-03-11 00:01:37,194 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-03-11 00:01:37,584 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-03-11 00:01:37,949 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2021-03-11 00:01:38,117 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-11 00:01:38,266 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-03-11 00:01:38,789 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-03-11 00:01:39,003 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:01:40,026 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 143 [2021-03-11 00:01:40,254 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:01:40,501 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-11 00:01:41,446 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 118 [2021-03-11 00:01:41,958 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 105 [2021-03-11 00:01:42,851 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 89 [2021-03-11 00:01:43,481 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 64 [2021-03-11 00:01:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:43,895 INFO L93 Difference]: Finished difference Result 3872 states and 11939 transitions. [2021-03-11 00:01:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-11 00:01:43,897 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:43,903 INFO L225 Difference]: With dead ends: 3872 [2021-03-11 00:01:43,903 INFO L226 Difference]: Without dead ends: 3722 [2021-03-11 00:01:43,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 8443.0ms TimeCoverageRelationStatistics Valid=761, Invalid=3661, Unknown=0, NotChecked=0, Total=4422 [2021-03-11 00:01:43,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2021-03-11 00:01:43,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 1557. [2021-03-11 00:01:43,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.3425449871465296) internal successors, (5201), 1556 states have internal predecessors, (5201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:43,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5201 transitions. [2021-03-11 00:01:43,943 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5201 transitions. Word has length 26 [2021-03-11 00:01:43,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:43,943 INFO L480 AbstractCegarLoop]: Abstraction has 1557 states and 5201 transitions. [2021-03-11 00:01:43,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:43,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5201 transitions. [2021-03-11 00:01:43,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:43,946 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:43,946 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] [2021-03-11 00:01:44,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable743 [2021-03-11 00:01:44,147 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:44,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:44,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-03-11 00:01:44,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:44,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783813196] [2021-03-11 00:01:44,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:44,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783813196] [2021-03-11 00:01:44,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573153963] [2021-03-11 00:01:44,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:44,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:01:44,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:44,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:01:44,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:45,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:45,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:01:45,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:45,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:45,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:01:45,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:45,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:45,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:01:45,316 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:45,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:45,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:01:45,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:45,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:45,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:01:45,345 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:45,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:45,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:01:45,358 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:45,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:45,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:01:45,372 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:45,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:45,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:01:45,385 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:45,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:45,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:01:45,398 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:45,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:45,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:01:45,412 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:45,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:45,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:01:45,425 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:45,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:45,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:01:45,440 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:45,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:45,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:01:45,454 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:45,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:45,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:01:45,466 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:45,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:45,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:45,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:01:45,474 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:45,502 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-03-11 00:01:45,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:01:45,505 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-03-11 00:01:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:45,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:45,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:01:45,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204764822] [2021-03-11 00:01:45,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:01:45,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:45,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:01:45,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:01:45,547 INFO L87 Difference]: Start difference. First operand 1557 states and 5201 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:46,132 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-03-11 00:01:46,731 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-03-11 00:01:47,054 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-11 00:01:47,442 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-03-11 00:01:47,852 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-03-11 00:01:48,295 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-03-11 00:01:48,659 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-11 00:01:49,188 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-03-11 00:01:49,379 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-03-11 00:01:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:49,674 INFO L93 Difference]: Finished difference Result 3190 states and 10116 transitions. [2021-03-11 00:01:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:01:49,675 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:49,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:49,680 INFO L225 Difference]: With dead ends: 3190 [2021-03-11 00:01:49,681 INFO L226 Difference]: Without dead ends: 3103 [2021-03-11 00:01:49,681 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3943.1ms TimeCoverageRelationStatistics Valid=602, Invalid=2704, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:01:49,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3103 states. [2021-03-11 00:01:49,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3103 to 1572. [2021-03-11 00:01:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.353278166772756) internal successors, (5268), 1571 states have internal predecessors, (5268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5268 transitions. [2021-03-11 00:01:49,716 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5268 transitions. Word has length 26 [2021-03-11 00:01:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:49,716 INFO L480 AbstractCegarLoop]: Abstraction has 1572 states and 5268 transitions. [2021-03-11 00:01:49,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5268 transitions. [2021-03-11 00:01:49,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:49,719 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:49,719 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] [2021-03-11 00:01:49,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable782 [2021-03-11 00:01:49,920 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:49,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:49,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-03-11 00:01:49,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:49,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201594068] [2021-03-11 00:01:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:50,273 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-03-11 00:01:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:50,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201594068] [2021-03-11 00:01:50,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735481273] [2021-03-11 00:01:50,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:50,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:01:50,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:50,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:01:50,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:51,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,244 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:01:51,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-03-11 00:01:51,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,277 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:01:51,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:01:51,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,316 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:01:51,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-03-11 00:01:51,323 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,346 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:01:51,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-03-11 00:01:51,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,372 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:01:51,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:01:51,374 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,396 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:01:51,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:01:51,397 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,433 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-03-11 00:01:51,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-03-11 00:01:51,435 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:51,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-03-11 00:01:51,479 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,514 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:01:51,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-03-11 00:01:51,517 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,537 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:01:51,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-03-11 00:01:51,538 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,565 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:01:51,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-03-11 00:01:51,567 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,584 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:01:51,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:01:51,585 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,601 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:01:51,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:01:51,602 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,618 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:01:51,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:01:51,619 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,635 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:01:51,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-03-11 00:01:51,636 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,646 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:01:51,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:01:51,647 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,739 INFO L628 ElimStorePlain]: treesize reduction 27, result has 77.5 percent of original size [2021-03-11 00:01:51,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:01:51,741 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-03-11 00:01:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:51,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:51,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:01:51,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373271150] [2021-03-11 00:01:51,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:01:51,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:51,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:01:51,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:01:51,852 INFO L87 Difference]: Start difference. First operand 1572 states and 5268 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:52,008 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2021-03-11 00:01:52,272 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-11 00:01:52,662 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-03-11 00:01:52,827 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-03-11 00:01:53,365 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-03-11 00:01:53,528 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-11 00:01:53,829 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-03-11 00:01:54,344 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-03-11 00:01:54,872 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-03-11 00:01:55,402 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-03-11 00:01:56,001 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-03-11 00:01:56,747 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-03-11 00:01:57,195 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-03-11 00:01:57,466 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-03-11 00:01:57,901 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-03-11 00:01:58,324 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-03-11 00:01:58,889 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-11 00:01:59,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:59,064 INFO L93 Difference]: Finished difference Result 3625 states and 11364 transitions. [2021-03-11 00:01:59,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-11 00:01:59,065 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:59,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:59,071 INFO L225 Difference]: With dead ends: 3625 [2021-03-11 00:01:59,072 INFO L226 Difference]: Without dead ends: 3537 [2021-03-11 00:01:59,072 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 6323.6ms TimeCoverageRelationStatistics Valid=813, Invalid=3347, Unknown=0, NotChecked=0, Total=4160 [2021-03-11 00:01:59,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-03-11 00:01:59,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 1585. [2021-03-11 00:01:59,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.359848484848485) internal successors, (5322), 1584 states have internal predecessors, (5322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5322 transitions. [2021-03-11 00:01:59,113 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5322 transitions. Word has length 26 [2021-03-11 00:01:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:59,113 INFO L480 AbstractCegarLoop]: Abstraction has 1585 states and 5322 transitions. [2021-03-11 00:01:59,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5322 transitions. [2021-03-11 00:01:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:59,116 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:59,116 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:59,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable878 [2021-03-11 00:01:59,323 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:59,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:59,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 13 times [2021-03-11 00:01:59,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:59,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534059199] [2021-03-11 00:01:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:59,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534059199] [2021-03-11 00:01:59,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631693416] [2021-03-11 00:01:59,848 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:59,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:01:59,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:00,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:00,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:00,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:00,640 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 30 treesize of output 13 [2021-03-11 00:02:00,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:00,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:00,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:00,649 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 30 treesize of output 16 [2021-03-11 00:02:00,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:00,786 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-03-11 00:02:00,787 INFO L628 ElimStorePlain]: treesize reduction 117, result has 42.4 percent of original size [2021-03-11 00:02:00,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:00,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:00,794 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 21 treesize of output 13 [2021-03-11 00:02:00,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:00,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:00,842 INFO L518 ElimStorePlain]: Eliminatee v_prenex_70 vanished before elimination [2021-03-11 00:02:00,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:00,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:00,848 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 23 treesize of output 13 [2021-03-11 00:02:00,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:00,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:00,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:02:00,891 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:22 [2021-03-11 00:02:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:00,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:00,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:02:00,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865499929] [2021-03-11 00:02:00,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:02:00,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:00,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:02:00,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:02:00,941 INFO L87 Difference]: Start difference. First operand 1585 states and 5322 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:02,211 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-03-11 00:02:02,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:02,461 INFO L93 Difference]: Finished difference Result 1983 states and 6532 transitions. [2021-03-11 00:02:02,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:02:02,462 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:02:02,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:02,466 INFO L225 Difference]: With dead ends: 1983 [2021-03-11 00:02:02,466 INFO L226 Difference]: Without dead ends: 1968 [2021-03-11 00:02:02,466 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1846.7ms TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:02:02,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-03-11 00:02:02,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1602. [2021-03-11 00:02:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1601 states have (on average 3.3560274828232353) internal successors, (5373), 1601 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 5373 transitions. [2021-03-11 00:02:02,494 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 5373 transitions. Word has length 26 [2021-03-11 00:02:02,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:02,494 INFO L480 AbstractCegarLoop]: Abstraction has 1602 states and 5373 transitions. [2021-03-11 00:02:02,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 5373 transitions. [2021-03-11 00:02:02,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:02,497 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:02,497 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:02,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-03-11 00:02:02,697 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:02,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:02,698 INFO L82 PathProgramCache]: Analyzing trace with hash -426889313, now seen corresponding path program 14 times [2021-03-11 00:02:02,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:02,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961416497] [2021-03-11 00:02:02,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:02,908 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-11 00:02:03,025 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2021-03-11 00:02:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:03,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961416497] [2021-03-11 00:02:03,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638035] [2021-03-11 00:02:03,256 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:03,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:02:03,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:03,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:02:03,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:03,770 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:02:04,125 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_94, A, v_prenex_82, v_prenex_92, v_prenex_80, v_prenex_86, v_prenex_78, v_prenex_90], 3=[v_prenex_76, v_prenex_96, v_prenex_84, v_prenex_88]} [2021-03-11 00:02:04,167 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:04,167 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:02:04,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:04,606 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 150 [2021-03-11 00:02:04,607 INFO L628 ElimStorePlain]: treesize reduction 128, result has 76.3 percent of original size [2021-03-11 00:02:04,642 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:02:04,642 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:02:04,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:04,886 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-03-11 00:02:04,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:04,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:04,917 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:02:04,920 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:05,167 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-03-11 00:02:05,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:05,207 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:05,207 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:02:05,214 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:05,456 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-03-11 00:02:05,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:05,495 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:05,495 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:02:05,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:05,731 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-03-11 00:02:05,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:05,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:05,774 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:02:05,778 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:06,017 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-03-11 00:02:06,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:06,017 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-03-11 00:02:06,049 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:02:06,050 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:02:06,052 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:06,281 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-03-11 00:02:06,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:06,282 INFO L518 ElimStorePlain]: Eliminatee v_prenex_76 vanished before elimination [2021-03-11 00:02:06,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:06,313 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:02:06,313 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-03-11 00:02:06,320 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:06,544 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-03-11 00:02:06,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:06,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:06,573 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-03-11 00:02:06,573 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-03-11 00:02:06,576 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:06,789 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-03-11 00:02:06,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:06,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:06,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:06,814 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-03-11 00:02:06,823 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:07,032 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-11 00:02:07,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:07,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-11 00:02:07,048 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:557, output treesize:471 [2021-03-11 00:02:07,489 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-03-11 00:02:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:07,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:07,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:02:07,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218597720] [2021-03-11 00:02:07,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:02:07,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:07,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:02:07,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:02:07,636 INFO L87 Difference]: Start difference. First operand 1602 states and 5373 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:08,162 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-03-11 00:02:08,686 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 33 [2021-03-11 00:02:08,951 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-11 00:02:09,212 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:02:09,616 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-03-11 00:02:09,789 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-11 00:02:10,164 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-03-11 00:02:10,436 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:02:10,875 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-03-11 00:02:11,554 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-03-11 00:02:12,486 WARN L205 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2021-03-11 00:02:13,686 WARN L205 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 68 [2021-03-11 00:02:14,065 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-03-11 00:02:14,406 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2021-03-11 00:02:14,629 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 24 [2021-03-11 00:02:14,927 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-03-11 00:02:15,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:15,373 INFO L93 Difference]: Finished difference Result 2579 states and 8141 transitions. [2021-03-11 00:02:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:02:15,374 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-03-11 00:02:15,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:15,378 INFO L225 Difference]: With dead ends: 2579 [2021-03-11 00:02:15,378 INFO L226 Difference]: Without dead ends: 2519 [2021-03-11 00:02:15,379 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 7852.9ms TimeCoverageRelationStatistics Valid=332, Invalid=1924, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:02:15,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-03-11 00:02:15,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1590. [2021-03-11 00:02:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.355569540591567) internal successors, (5332), 1589 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:15,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5332 transitions. [2021-03-11 00:02:15,410 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5332 transitions. Word has length 26 [2021-03-11 00:02:15,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:15,410 INFO L480 AbstractCegarLoop]: Abstraction has 1590 states and 5332 transitions. [2021-03-11 00:02:15,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:15,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5332 transitions. [2021-03-11 00:02:15,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:15,414 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:15,414 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:15,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:15,615 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:15,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1363716195, now seen corresponding path program 15 times [2021-03-11 00:02:15,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:15,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070381088] [2021-03-11 00:02:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:15,847 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-11 00:02:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:16,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070381088] [2021-03-11 00:02:16,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125969834] [2021-03-11 00:02:16,130 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:16,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:02:16,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:16,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:02:16,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:16,684 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:02:16,684 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:02:16,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,700 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:16,701 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:16,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,716 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:16,716 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:16,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,746 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:02:16,746 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:02:16,749 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,782 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:16,782 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:02:16,784 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,807 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-03-11 00:02:16,807 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 19 [2021-03-11 00:02:16,809 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,824 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:16,824 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:16,825 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:16,857 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:02:16,865 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,880 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:16,881 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:16,882 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,900 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:16,900 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:02:16,902 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,918 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:16,918 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:16,919 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,935 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:16,935 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:16,937 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,952 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:16,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:16,953 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,983 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-11 00:02:16,983 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 23 [2021-03-11 00:02:16,985 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:17,016 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:17,016 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:02:17,022 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:17,032 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:17,032 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:17,033 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:17,238 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-11 00:02:17,239 INFO L628 ElimStorePlain]: treesize reduction 35, result has 82.3 percent of original size [2021-03-11 00:02:17,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:02:17,242 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:729, output treesize:157 [2021-03-11 00:02:17,431 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-11 00:02:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:17,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:17,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:02:17,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141051682] [2021-03-11 00:02:17,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:02:17,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:17,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:02:17,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:02:17,483 INFO L87 Difference]: Start difference. First operand 1590 states and 5332 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:18,343 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-03-11 00:02:18,625 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-03-11 00:02:18,920 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-03-11 00:02:19,149 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-03-11 00:02:19,402 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-03-11 00:02:19,958 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2021-03-11 00:02:20,129 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-11 00:02:20,578 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-03-11 00:02:20,792 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-11 00:02:20,974 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-11 00:02:21,601 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2021-03-11 00:02:21,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:21,709 INFO L93 Difference]: Finished difference Result 2323 states and 7556 transitions. [2021-03-11 00:02:21,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:02:21,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:02:21,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:21,714 INFO L225 Difference]: With dead ends: 2323 [2021-03-11 00:02:21,714 INFO L226 Difference]: Without dead ends: 2308 [2021-03-11 00:02:21,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 4008.5ms TimeCoverageRelationStatistics Valid=254, Invalid=1468, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:02:21,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-03-11 00:02:21,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1582. [2021-03-11 00:02:21,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.3630613535736877) internal successors, (5317), 1581 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5317 transitions. [2021-03-11 00:02:21,746 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5317 transitions. Word has length 26 [2021-03-11 00:02:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:21,746 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 5317 transitions. [2021-03-11 00:02:21,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5317 transitions. [2021-03-11 00:02:21,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:21,749 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:21,749 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:21,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-03-11 00:02:21,950 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:21,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:21,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1195907103, now seen corresponding path program 16 times [2021-03-11 00:02:21,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:21,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278166833] [2021-03-11 00:02:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:22,325 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-11 00:02:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:22,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278166833] [2021-03-11 00:02:22,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141045878] [2021-03-11 00:02:22,443 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:22,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:02:22,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:22,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:02:22,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:23,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:23,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,085 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 28 treesize of output 16 [2021-03-11 00:02:23,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:23,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:23,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,101 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 33 treesize of output 19 [2021-03-11 00:02:23,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:23,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:23,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,115 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 30 treesize of output 13 [2021-03-11 00:02:23,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:23,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:23,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,130 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 21 treesize of output 13 [2021-03-11 00:02:23,131 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:23,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:23,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,145 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 30 treesize of output 13 [2021-03-11 00:02:23,147 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:23,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:23,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,161 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 30 treesize of output 16 [2021-03-11 00:02:23,162 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:23,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:23,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,176 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 33 treesize of output 19 [2021-03-11 00:02:23,178 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:23,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:23,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,190 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 21 treesize of output 13 [2021-03-11 00:02:23,192 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:23,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:23,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,205 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 30 treesize of output 16 [2021-03-11 00:02:23,207 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:23,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:23,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,219 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 28 treesize of output 16 [2021-03-11 00:02:23,220 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:23,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:23,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,231 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 26 treesize of output 13 [2021-03-11 00:02:23,234 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:23,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:23,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,245 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 33 treesize of output 19 [2021-03-11 00:02:23,247 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:23,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:23,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,257 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 28 treesize of output 16 [2021-03-11 00:02:23,259 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:23,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:23,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,271 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 33 treesize of output 19 [2021-03-11 00:02:23,272 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:23,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:23,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:23,279 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 28 treesize of output 16 [2021-03-11 00:02:23,281 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:23,318 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-03-11 00:02:23,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:02:23,321 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-03-11 00:02:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:23,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:23,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:02:23,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162704287] [2021-03-11 00:02:23,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:02:23,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:23,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:02:23,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:02:23,372 INFO L87 Difference]: Start difference. First operand 1582 states and 5317 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:24,010 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-11 00:02:24,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:24,178 INFO L93 Difference]: Finished difference Result 1917 states and 6354 transitions. [2021-03-11 00:02:24,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:02:24,179 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:02:24,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:24,182 INFO L225 Difference]: With dead ends: 1917 [2021-03-11 00:02:24,182 INFO L226 Difference]: Without dead ends: 1902 [2021-03-11 00:02:24,182 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1041.9ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:02:24,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-03-11 00:02:24,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1594. [2021-03-11 00:02:24,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 3.3659761456371626) internal successors, (5362), 1593 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 5362 transitions. [2021-03-11 00:02:24,210 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 5362 transitions. Word has length 26 [2021-03-11 00:02:24,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:24,210 INFO L480 AbstractCegarLoop]: Abstraction has 1594 states and 5362 transitions. [2021-03-11 00:02:24,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:24,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 5362 transitions. [2021-03-11 00:02:24,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:24,213 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:24,213 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:24,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1105,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:24,427 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:24,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:24,427 INFO L82 PathProgramCache]: Analyzing trace with hash -871608925, now seen corresponding path program 17 times [2021-03-11 00:02:24,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:24,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783960028] [2021-03-11 00:02:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:24,659 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-11 00:02:24,782 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-03-11 00:02:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:24,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783960028] [2021-03-11 00:02:24,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347353576] [2021-03-11 00:02:24,959 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:24,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:02:24,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:24,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:02:24,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:25,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:25,461 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:25,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:25,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:25,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:25,477 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:25,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:25,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:25,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:25,498 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:25,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:02:25,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:25,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:25,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:25,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:02:25,522 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:25,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:25,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:25,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:02:25,547 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:25,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:25,561 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:25,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:25,563 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:25,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:25,584 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:25,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:02:25,587 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:25,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:25,601 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:25,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:25,603 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:25,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:25,618 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:25,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:25,620 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:25,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:25,642 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:25,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:02:25,644 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:25,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:25,665 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-03-11 00:02:25,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 19 [2021-03-11 00:02:25,667 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:25,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:25,684 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:25,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:25,685 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:25,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:25,700 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:25,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:25,702 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:25,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:25,718 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:25,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:25,719 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:25,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:25,738 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:25,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:02:25,741 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:25,750 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:25,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:02:25,752 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:25,922 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-11 00:02:25,923 INFO L628 ElimStorePlain]: treesize reduction 40, result has 73.9 percent of original size [2021-03-11 00:02:25,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:02:25,925 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:91 [2021-03-11 00:02:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:26,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:26,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:02:26,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982280718] [2021-03-11 00:02:26,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:02:26,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:26,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:02:26,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:02:26,092 INFO L87 Difference]: Start difference. First operand 1594 states and 5362 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:26,368 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 25 [2021-03-11 00:02:26,777 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2021-03-11 00:02:26,963 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2021-03-11 00:02:27,268 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-03-11 00:02:27,691 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-03-11 00:02:27,994 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-03-11 00:02:28,187 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-11 00:02:28,540 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-03-11 00:02:28,982 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-03-11 00:02:29,566 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-03-11 00:02:29,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:29,907 INFO L93 Difference]: Finished difference Result 2518 states and 8191 transitions. [2021-03-11 00:02:29,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:02:29,908 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-03-11 00:02:29,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:29,913 INFO L225 Difference]: With dead ends: 2518 [2021-03-11 00:02:29,913 INFO L226 Difference]: Without dead ends: 2488 [2021-03-11 00:02:29,913 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 3478.5ms TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:02:29,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-03-11 00:02:29,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 1595. [2021-03-11 00:02:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.3676286072772896) internal successors, (5368), 1594 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5368 transitions. [2021-03-11 00:02:29,952 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5368 transitions. Word has length 26 [2021-03-11 00:02:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:29,952 INFO L480 AbstractCegarLoop]: Abstraction has 1595 states and 5368 transitions. [2021-03-11 00:02:29,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5368 transitions. [2021-03-11 00:02:29,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:29,955 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:29,955 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:30,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1147 [2021-03-11 00:02:30,156 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:30,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1432729289, now seen corresponding path program 18 times [2021-03-11 00:02:30,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:30,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255858647] [2021-03-11 00:02:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:30,493 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-03-11 00:02:30,648 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 31 [2021-03-11 00:02:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:30,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255858647] [2021-03-11 00:02:30,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651697834] [2021-03-11 00:02:30,948 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:30,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:02:30,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:30,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:02:30,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:31,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:31,396 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:31,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:02:31,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:31,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:31,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:31,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:02:31,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:31,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:31,440 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:31,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:31,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:31,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:31,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:31,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-03-11 00:02:31,468 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:31,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:31,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:31,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:02:31,493 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:31,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:31,512 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:31,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-03-11 00:02:31,514 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:31,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:31,529 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:31,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:31,531 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:31,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:31,546 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:31,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:02:31,547 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:31,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:31,586 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:31,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-03-11 00:02:31,588 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:31,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:31,609 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:31,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-03-11 00:02:31,611 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:31,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:31,631 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:31,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:02:31,634 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:31,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:31,650 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:31,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-03-11 00:02:31,651 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:31,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:31,667 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:31,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:02:31,668 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:31,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:31,683 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:31,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:31,686 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:31,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:31,699 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:31,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:31,701 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:31,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:31,714 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:31,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:02:31,717 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:31,866 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-11 00:02:31,866 INFO L628 ElimStorePlain]: treesize reduction 16, result has 85.6 percent of original size [2021-03-11 00:02:31,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:02:31,868 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:95 [2021-03-11 00:02:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:32,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:32,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:02:32,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726787131] [2021-03-11 00:02:32,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:02:32,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:32,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:02:32,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:02:32,027 INFO L87 Difference]: Start difference. First operand 1595 states and 5368 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:32,539 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-03-11 00:02:33,085 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 31 [2021-03-11 00:02:33,299 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-11 00:02:33,591 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-03-11 00:02:33,881 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-03-11 00:02:34,172 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-03-11 00:02:34,450 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-03-11 00:02:34,616 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-03-11 00:02:35,234 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-03-11 00:02:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:35,413 INFO L93 Difference]: Finished difference Result 2232 states and 7334 transitions. [2021-03-11 00:02:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:02:35,414 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-03-11 00:02:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:35,418 INFO L225 Difference]: With dead ends: 2232 [2021-03-11 00:02:35,419 INFO L226 Difference]: Without dead ends: 2217 [2021-03-11 00:02:35,419 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 3666.4ms TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:02:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2021-03-11 00:02:35,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 1591. [2021-03-11 00:02:35,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.3660377358490567) internal successors, (5352), 1590 states have internal predecessors, (5352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5352 transitions. [2021-03-11 00:02:35,450 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5352 transitions. Word has length 26 [2021-03-11 00:02:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:35,450 INFO L480 AbstractCegarLoop]: Abstraction has 1591 states and 5352 transitions. [2021-03-11 00:02:35,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5352 transitions. [2021-03-11 00:02:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:35,453 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:35,453 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:35,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1192,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:35,654 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:35,654 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 19 times [2021-03-11 00:02:35,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:35,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699307458] [2021-03-11 00:02:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:36,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699307458] [2021-03-11 00:02:36,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172937727] [2021-03-11 00:02:36,063 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:36,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:02:36,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:37,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:37,129 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 21 treesize of output 13 [2021-03-11 00:02:37,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,308 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-11 00:02:37,309 INFO L628 ElimStorePlain]: treesize reduction 130, result has 44.0 percent of original size [2021-03-11 00:02:37,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:37,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,317 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 21 treesize of output 13 [2021-03-11 00:02:37,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:37,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:02:37,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:37,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:37,442 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 23 treesize of output 13 [2021-03-11 00:02:37,444 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:37,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:02:37,492 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:22 [2021-03-11 00:02:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:37,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:37,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:02:37,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562297674] [2021-03-11 00:02:37,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:02:37,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:37,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:02:37,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:02:37,547 INFO L87 Difference]: Start difference. First operand 1591 states and 5352 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:38,846 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-03-11 00:02:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:38,985 INFO L93 Difference]: Finished difference Result 2054 states and 6752 transitions. [2021-03-11 00:02:38,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:02:38,986 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:02:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:38,990 INFO L225 Difference]: With dead ends: 2054 [2021-03-11 00:02:38,990 INFO L226 Difference]: Without dead ends: 2033 [2021-03-11 00:02:38,990 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1991.1ms TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:02:38,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2021-03-11 00:02:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1632. [2021-03-11 00:02:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.3623543838136114) internal successors, (5484), 1631 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:39,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5484 transitions. [2021-03-11 00:02:39,019 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5484 transitions. Word has length 26 [2021-03-11 00:02:39,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:39,019 INFO L480 AbstractCegarLoop]: Abstraction has 1632 states and 5484 transitions. [2021-03-11 00:02:39,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:39,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5484 transitions. [2021-03-11 00:02:39,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:39,023 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:39,023 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:39,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1213 [2021-03-11 00:02:39,228 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:39,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:39,228 INFO L82 PathProgramCache]: Analyzing trace with hash 658414247, now seen corresponding path program 20 times [2021-03-11 00:02:39,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:39,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480292128] [2021-03-11 00:02:39,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:39,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480292128] [2021-03-11 00:02:39,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590426799] [2021-03-11 00:02:39,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:39,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:02:39,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:39,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:02:39,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:40,238 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:40,238 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:40,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:40,256 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:40,256 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:40,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:40,273 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:40,274 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:40,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:40,314 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:40,314 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:02:40,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:40,364 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:40,365 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:02:40,367 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:40,399 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:02:40,399 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:02:40,402 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:40,442 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:40,442 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:02:40,444 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:40,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:40,474 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:02:40,497 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:40,523 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-03-11 00:02:40,524 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 19 [2021-03-11 00:02:40,525 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:40,543 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:40,543 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:40,545 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:40,565 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:40,565 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:02:40,567 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:40,585 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:40,585 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:40,586 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:40,605 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:40,605 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:40,606 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:40,631 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:40,631 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:40,632 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:40,648 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:40,648 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:40,649 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:40,673 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-11 00:02:40,674 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 23 [2021-03-11 00:02:40,675 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:40,907 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-11 00:02:40,907 INFO L628 ElimStorePlain]: treesize reduction 37, result has 80.3 percent of original size [2021-03-11 00:02:40,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:02:40,910 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:697, output treesize:177 [2021-03-11 00:02:41,057 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:02:41,266 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-11 00:02:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:41,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:41,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-11 00:02:41,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628058660] [2021-03-11 00:02:41,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:02:41,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:41,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:02:41,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:02:41,343 INFO L87 Difference]: Start difference. First operand 1632 states and 5484 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:41,578 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 26 [2021-03-11 00:02:41,971 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-03-11 00:02:42,134 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-03-11 00:02:42,334 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:02:42,807 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-03-11 00:02:42,991 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:02:43,170 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-11 00:02:43,644 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-03-11 00:02:43,866 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-11 00:02:44,319 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-03-11 00:02:44,513 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-11 00:02:44,752 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-03-11 00:02:45,081 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-03-11 00:02:45,541 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 22 [2021-03-11 00:02:45,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:45,674 INFO L93 Difference]: Finished difference Result 2172 states and 7045 transitions. [2021-03-11 00:02:45,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:02:45,675 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-03-11 00:02:45,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:45,679 INFO L225 Difference]: With dead ends: 2172 [2021-03-11 00:02:45,679 INFO L226 Difference]: Without dead ends: 2147 [2021-03-11 00:02:45,679 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 4327.9ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:02:45,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2021-03-11 00:02:45,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1628. [2021-03-11 00:02:45,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1627 states have (on average 3.3761524277811925) internal successors, (5493), 1627 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 5493 transitions. [2021-03-11 00:02:45,709 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 5493 transitions. Word has length 26 [2021-03-11 00:02:45,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:45,709 INFO L480 AbstractCegarLoop]: Abstraction has 1628 states and 5493 transitions. [2021-03-11 00:02:45,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:45,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 5493 transitions. [2021-03-11 00:02:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:45,712 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:45,712 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:45,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1232 [2021-03-11 00:02:45,913 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:45,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:45,913 INFO L82 PathProgramCache]: Analyzing trace with hash 638446221, now seen corresponding path program 21 times [2021-03-11 00:02:45,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:45,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194027574] [2021-03-11 00:02:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:46,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194027574] [2021-03-11 00:02:46,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649900189] [2021-03-11 00:02:46,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:46,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:02:46,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:46,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:02:46,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:46,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:46,976 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:02:46,976 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:02:46,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:46,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:47,020 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:47,020 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:02:47,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:47,301 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-11 00:02:47,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:47,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:47,344 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:47,345 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:02:47,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:47,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:47,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:47,378 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:02:47,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:47,611 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-11 00:02:47,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:47,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:47,654 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:47,655 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:02:47,658 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:47,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:47,694 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:02:47,695 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:02:47,698 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:47,937 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:02:47,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:47,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:47,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:47,970 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:02:47,979 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:47,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:48,014 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:48,014 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:02:48,021 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:48,218 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-11 00:02:48,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:48,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:02:48,251 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:329, output treesize:220 [2021-03-11 00:02:48,469 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-11 00:02:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:48,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:48,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-11 00:02:48,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017530395] [2021-03-11 00:02:48,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:02:48,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:48,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:02:48,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:02:48,563 INFO L87 Difference]: Start difference. First operand 1628 states and 5493 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:49,388 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-11 00:02:49,745 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:02:50,024 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-11 00:02:50,586 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-03-11 00:02:50,989 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-03-11 00:02:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:51,308 INFO L93 Difference]: Finished difference Result 2262 states and 7406 transitions. [2021-03-11 00:02:51,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:02:51,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-03-11 00:02:51,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:51,313 INFO L225 Difference]: With dead ends: 2262 [2021-03-11 00:02:51,313 INFO L226 Difference]: Without dead ends: 2233 [2021-03-11 00:02:51,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2955.0ms TimeCoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:02:51,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2021-03-11 00:02:51,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1649. [2021-03-11 00:02:51,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.370752427184466) internal successors, (5555), 1648 states have internal predecessors, (5555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:51,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5555 transitions. [2021-03-11 00:02:51,345 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5555 transitions. Word has length 26 [2021-03-11 00:02:51,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:51,346 INFO L480 AbstractCegarLoop]: Abstraction has 1649 states and 5555 transitions. [2021-03-11 00:02:51,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5555 transitions. [2021-03-11 00:02:51,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:51,349 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:51,349 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:51,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1281,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:51,559 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:51,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:51,559 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 22 times [2021-03-11 00:02:51,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:51,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427188810] [2021-03-11 00:02:51,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:51,855 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-11 00:02:52,066 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-11 00:02:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:52,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427188810] [2021-03-11 00:02:52,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789282835] [2021-03-11 00:02:52,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:52,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:02:52,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:52,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:02:52,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:52,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,794 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 30 treesize of output 13 [2021-03-11 00:02:52,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:02:52,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,947 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-03-11 00:02:52,948 INFO L628 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2021-03-11 00:02:52,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,955 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 21 treesize of output 13 [2021-03-11 00:02:52,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:53,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:53,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:53,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:02:53,008 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:53,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:53,045 INFO L518 ElimStorePlain]: Eliminatee v_prenex_123 vanished before elimination [2021-03-11 00:02:53,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:02:53,049 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:244, output treesize:29 [2021-03-11 00:02:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:53,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:53,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:02:53,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63328298] [2021-03-11 00:02:53,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:02:53,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:53,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:02:53,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:02:53,119 INFO L87 Difference]: Start difference. First operand 1649 states and 5555 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:53,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:53,936 INFO L93 Difference]: Finished difference Result 1772 states and 5890 transitions. [2021-03-11 00:02:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:02:53,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:02:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:53,940 INFO L225 Difference]: With dead ends: 1772 [2021-03-11 00:02:53,940 INFO L226 Difference]: Without dead ends: 1757 [2021-03-11 00:02:53,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1136.7ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:02:53,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-03-11 00:02:53,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1655. [2021-03-11 00:02:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 3.3724304715840385) internal successors, (5578), 1654 states have internal predecessors, (5578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:53,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 5578 transitions. [2021-03-11 00:02:53,965 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 5578 transitions. Word has length 26 [2021-03-11 00:02:53,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:53,965 INFO L480 AbstractCegarLoop]: Abstraction has 1655 states and 5578 transitions. [2021-03-11 00:02:53,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:53,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 5578 transitions. [2021-03-11 00:02:53,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:53,968 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:53,968 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:54,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1317,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:54,169 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:54,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:54,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1766954001, now seen corresponding path program 23 times [2021-03-11 00:02:54,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:54,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345222143] [2021-03-11 00:02:54,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:54,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345222143] [2021-03-11 00:02:54,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473036942] [2021-03-11 00:02:54,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:54,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:02:54,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:54,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-11 00:02:54,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:55,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,460 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:55,460 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:02:55,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,502 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:55,502 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:02:55,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,762 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-11 00:02:55,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:55,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,803 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:02:55,803 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:02:55,807 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:55,834 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:02:55,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:56,083 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-11 00:02:56,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:56,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:56,124 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:02:56,124 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:02:56,127 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:56,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:56,153 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:02:56,176 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:56,396 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-11 00:02:56,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:56,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:56,438 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:56,438 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:02:56,443 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:56,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:56,475 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:56,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:02:56,478 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:56,669 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:02:56,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:56,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:02:56,693 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:329, output treesize:220 [2021-03-11 00:02:56,925 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-11 00:02:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:57,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:57,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:02:57,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139029601] [2021-03-11 00:02:57,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:02:57,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:57,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:02:57,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:02:57,014 INFO L87 Difference]: Start difference. First operand 1655 states and 5578 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:57,209 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2021-03-11 00:02:57,758 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-11 00:02:58,531 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:02:59,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:59,622 INFO L93 Difference]: Finished difference Result 2360 states and 7691 transitions. [2021-03-11 00:02:59,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:02:59,624 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-03-11 00:02:59,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:59,628 INFO L225 Difference]: With dead ends: 2360 [2021-03-11 00:02:59,628 INFO L226 Difference]: Without dead ends: 2310 [2021-03-11 00:02:59,629 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2676.2ms TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:02:59,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-03-11 00:02:59,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1662. [2021-03-11 00:02:59,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.3762793497892836) internal successors, (5608), 1661 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5608 transitions. [2021-03-11 00:02:59,660 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5608 transitions. Word has length 26 [2021-03-11 00:02:59,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:59,660 INFO L480 AbstractCegarLoop]: Abstraction has 1662 states and 5608 transitions. [2021-03-11 00:02:59,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:59,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5608 transitions. [2021-03-11 00:02:59,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:59,662 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:59,663 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:59,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-03-11 00:02:59,863 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:59,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:59,863 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 24 times [2021-03-11 00:02:59,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:59,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084058491] [2021-03-11 00:02:59,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:00,108 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 32 [2021-03-11 00:03:00,373 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-11 00:03:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:00,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084058491] [2021-03-11 00:03:00,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634382819] [2021-03-11 00:03:00,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:00,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:03:00,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:00,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:03:00,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:00,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:00,954 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:00,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:03:00,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:00,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:00,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:00,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:03:00,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:00,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,002 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:01,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:03:01,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:01,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-03-11 00:03:01,033 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:01,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:03:01,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,089 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:01,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-03-11 00:03:01,092 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,111 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:01,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:03:01,114 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,132 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:01,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:03:01,134 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,156 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:01,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-03-11 00:03:01,158 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,183 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:01,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-03-11 00:03:01,186 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,210 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:01,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:03:01,214 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,234 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:01,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-03-11 00:03:01,236 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,256 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:01,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:03:01,258 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,275 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:01,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:03:01,278 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,294 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:01,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:03:01,296 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,311 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:01,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:03:01,315 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,481 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-11 00:03:01,481 INFO L628 ElimStorePlain]: treesize reduction 16, result has 85.6 percent of original size [2021-03-11 00:03:01,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:03:01,483 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:95 [2021-03-11 00:03:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:01,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:01,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:03:01,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681939294] [2021-03-11 00:03:01,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:03:01,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:01,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:03:01,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:03:01,660 INFO L87 Difference]: Start difference. First operand 1662 states and 5608 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:02,191 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-11 00:03:02,566 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-03-11 00:03:02,779 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-11 00:03:03,439 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-03-11 00:03:03,591 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:03:03,803 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2021-03-11 00:03:03,956 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:03:04,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:04,086 INFO L93 Difference]: Finished difference Result 2236 states and 7365 transitions. [2021-03-11 00:03:04,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:03:04,087 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-03-11 00:03:04,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:04,090 INFO L225 Difference]: With dead ends: 2236 [2021-03-11 00:03:04,090 INFO L226 Difference]: Without dead ends: 2202 [2021-03-11 00:03:04,090 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 2639.8ms TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:03:04,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-03-11 00:03:04,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1685. [2021-03-11 00:03:04,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1684 states have (on average 3.3818289786223277) internal successors, (5695), 1684 states have internal predecessors, (5695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:04,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 5695 transitions. [2021-03-11 00:03:04,118 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 5695 transitions. Word has length 26 [2021-03-11 00:03:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:04,118 INFO L480 AbstractCegarLoop]: Abstraction has 1685 states and 5695 transitions. [2021-03-11 00:03:04,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 5695 transitions. [2021-03-11 00:03:04,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:04,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:04,121 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:03:04,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1393 [2021-03-11 00:03:04,322 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:04,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:04,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 25 times [2021-03-11 00:03:04,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:04,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195952394] [2021-03-11 00:03:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:04,554 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-11 00:03:04,804 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-11 00:03:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:04,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195952394] [2021-03-11 00:03:04,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573455247] [2021-03-11 00:03:04,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:03:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:04,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:03:04,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:05,294 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:03:05,584 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-03-11 00:03:06,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:06,077 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:03:06,077 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:03:06,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:06,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:06,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:06,112 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:03:06,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:06,809 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2021-03-11 00:03:06,809 INFO L628 ElimStorePlain]: treesize reduction 24, result has 94.5 percent of original size [2021-03-11 00:03:06,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:06,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:06,849 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:03:06,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:06,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:06,894 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:03:06,894 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:03:06,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:07,558 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2021-03-11 00:03:07,559 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.7 percent of original size [2021-03-11 00:03:07,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:07,608 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:03:07,608 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:03:07,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:07,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:07,657 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:03:07,657 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:03:07,660 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:07,977 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-11 00:03:07,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:07,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:08,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:08,018 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:03:08,028 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:08,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:08,061 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:03:08,061 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:03:08,064 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:08,647 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-03-11 00:03:08,647 INFO L628 ElimStorePlain]: treesize reduction 14, result has 95.8 percent of original size [2021-03-11 00:03:08,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:08,688 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:03:08,688 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:03:08,691 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:08,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:08,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:08,721 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:03:08,733 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,251 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-03-11 00:03:09,252 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-03-11 00:03:09,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-11 00:03:09,285 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 11 variables, input treesize:457, output treesize:247 [2021-03-11 00:03:09,569 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-11 00:03:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:09,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:09,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:03:09,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483564575] [2021-03-11 00:03:09,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:03:09,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:09,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:03:09,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:03:09,668 INFO L87 Difference]: Start difference. First operand 1685 states and 5695 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:09,863 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 26 [2021-03-11 00:03:10,266 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-03-11 00:03:10,670 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2021-03-11 00:03:10,922 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:03:11,184 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:03:11,567 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2021-03-11 00:03:11,815 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:03:11,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:11,911 INFO L93 Difference]: Finished difference Result 2338 states and 7678 transitions. [2021-03-11 00:03:11,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:03:11,912 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:03:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:11,917 INFO L225 Difference]: With dead ends: 2338 [2021-03-11 00:03:11,917 INFO L226 Difference]: Without dead ends: 2292 [2021-03-11 00:03:11,917 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 3000.9ms TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:03:11,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-03-11 00:03:11,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 1706. [2021-03-11 00:03:11,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1705 states have (on average 3.38475073313783) internal successors, (5771), 1705 states have internal predecessors, (5771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 5771 transitions. [2021-03-11 00:03:11,954 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 5771 transitions. Word has length 26 [2021-03-11 00:03:11,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:11,955 INFO L480 AbstractCegarLoop]: Abstraction has 1706 states and 5771 transitions. [2021-03-11 00:03:11,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:11,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 5771 transitions. [2021-03-11 00:03:11,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:11,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:11,959 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] [2021-03-11 00:03:12,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1414 [2021-03-11 00:03:12,173 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:12,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:12,173 INFO L82 PathProgramCache]: Analyzing trace with hash -39476015, now seen corresponding path program 42 times [2021-03-11 00:03:12,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:12,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237648180] [2021-03-11 00:03:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:12,387 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-11 00:03:12,502 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-11 00:03:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:12,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237648180] [2021-03-11 00:03:12,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623674503] [2021-03-11 00:03:12,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:12,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:03:12,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:12,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:03:12,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:13,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:13,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:03:13,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:13,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:13,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:03:13,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:13,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:13,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:03:13,660 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:13,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:13,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:03:13,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:13,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:13,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:03:13,697 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:13,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:13,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:03:13,714 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:13,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:13,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:03:13,733 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:13,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:13,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:03:13,751 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:13,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:13,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:03:13,770 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:13,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:13,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:03:13,787 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:13,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:13,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:03:13,802 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:13,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:13,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:03:13,817 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:13,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:13,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:03:13,831 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:13,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:13,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:03:13,847 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:13,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:13,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:13,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:03:13,857 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:13,897 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-03-11 00:03:13,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:03:13,899 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-03-11 00:03:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:13,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:13,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:03:13,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122640951] [2021-03-11 00:03:13,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:03:13,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:13,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:03:13,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:03:13,945 INFO L87 Difference]: Start difference. First operand 1706 states and 5771 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:14,690 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-03-11 00:03:15,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:15,780 INFO L93 Difference]: Finished difference Result 2169 states and 7149 transitions. [2021-03-11 00:03:15,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:03:15,782 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:03:15,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:15,786 INFO L225 Difference]: With dead ends: 2169 [2021-03-11 00:03:15,786 INFO L226 Difference]: Without dead ends: 2143 [2021-03-11 00:03:15,786 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1862.3ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:03:15,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-03-11 00:03:15,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1710. [2021-03-11 00:03:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 3.382679929783499) internal successors, (5781), 1709 states have internal predecessors, (5781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5781 transitions. [2021-03-11 00:03:15,815 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5781 transitions. Word has length 26 [2021-03-11 00:03:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:15,815 INFO L480 AbstractCegarLoop]: Abstraction has 1710 states and 5781 transitions. [2021-03-11 00:03:15,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5781 transitions. [2021-03-11 00:03:15,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:15,818 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:15,818 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] [2021-03-11 00:03:16,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1489,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:16,018 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:16,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:16,018 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-03-11 00:03:16,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:16,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969940206] [2021-03-11 00:03:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:16,258 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-03-11 00:03:16,407 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-03-11 00:03:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:16,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969940206] [2021-03-11 00:03:16,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153357461] [2021-03-11 00:03:16,647 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:16,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:03:16,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:17,202 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-11 00:03:17,263 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_141, v_prenex_143], 5=[A, v_prenex_139]} [2021-03-11 00:03:17,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:17,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:17,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:17,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:17,273 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 28 treesize of output 13 [2021-03-11 00:03:17,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:17,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:17,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:17,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:17,281 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 23 treesize of output 13 [2021-03-11 00:03:17,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:17,428 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-11 00:03:17,429 INFO L628 ElimStorePlain]: treesize reduction 141, result has 44.5 percent of original size [2021-03-11 00:03:17,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:17,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:03:17,442 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:17,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:17,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:17,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:17,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:17,513 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 27 treesize of output 13 [2021-03-11 00:03:17,515 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:17,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:17,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:17,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:17,575 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 29 treesize of output 13 [2021-03-11 00:03:17,577 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:17,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:17,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:03:17,626 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:307, output treesize:32 [2021-03-11 00:03:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:17,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:17,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:03:17,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523048414] [2021-03-11 00:03:17,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:03:17,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:17,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:03:17,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:03:17,705 INFO L87 Difference]: Start difference. First operand 1710 states and 5781 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:18,545 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 26 [2021-03-11 00:03:18,977 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2021-03-11 00:03:19,130 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2021-03-11 00:03:19,394 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2021-03-11 00:03:19,786 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2021-03-11 00:03:19,955 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2021-03-11 00:03:20,626 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-11 00:03:21,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:21,209 INFO L93 Difference]: Finished difference Result 2394 states and 7875 transitions. [2021-03-11 00:03:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:03:21,211 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:03:21,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:21,215 INFO L225 Difference]: With dead ends: 2394 [2021-03-11 00:03:21,215 INFO L226 Difference]: Without dead ends: 2379 [2021-03-11 00:03:21,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 3591.8ms TimeCoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:03:21,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2021-03-11 00:03:21,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 1716. [2021-03-11 00:03:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.3842565597667638) internal successors, (5804), 1715 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:21,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5804 transitions. [2021-03-11 00:03:21,248 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5804 transitions. Word has length 26 [2021-03-11 00:03:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:21,248 INFO L480 AbstractCegarLoop]: Abstraction has 1716 states and 5804 transitions. [2021-03-11 00:03:21,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5804 transitions. [2021-03-11 00:03:21,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:21,251 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:21,251 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:03:21,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1579 [2021-03-11 00:03:21,452 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:21,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:21,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 26 times [2021-03-11 00:03:21,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:21,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568047793] [2021-03-11 00:03:21,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:21,761 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-03-11 00:03:22,099 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-03-11 00:03:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:22,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568047793] [2021-03-11 00:03:22,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181333081] [2021-03-11 00:03:22,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:22,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:03:22,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:22,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:03:22,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:22,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:22,807 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:22,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:03:22,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:22,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:22,834 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:22,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:03:22,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:22,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:22,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:22,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-03-11 00:03:22,873 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:22,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:22,894 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:22,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:03:22,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:22,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:22,917 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:22,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:03:22,919 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:22,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:22,943 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:22,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:03:22,946 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:22,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:22,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:22,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:03:22,975 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:22,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:22,994 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:22,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:03:22,996 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:23,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,018 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:23,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:03:23,020 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:23,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,040 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:23,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:03:23,041 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:23,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:23,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:03:23,077 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:23,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,104 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:23,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:03:23,107 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:23,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,128 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:23,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:03:23,129 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:23,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,148 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:23,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:03:23,151 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:23,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,176 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:23,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-03-11 00:03:23,179 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:23,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,193 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:23,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:03:23,195 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:23,365 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-03-11 00:03:23,365 INFO L628 ElimStorePlain]: treesize reduction 51, result has 60.5 percent of original size [2021-03-11 00:03:23,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:03:23,367 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-03-11 00:03:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:23,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:23,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:03:23,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709135648] [2021-03-11 00:03:23,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:03:23,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:23,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:03:23,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:03:23,534 INFO L87 Difference]: Start difference. First operand 1716 states and 5804 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:24,110 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 36 [2021-03-11 00:03:24,390 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-03-11 00:03:24,733 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 31 [2021-03-11 00:03:25,128 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2021-03-11 00:03:25,462 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-11 00:03:25,756 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-11 00:03:25,982 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-03-11 00:03:26,432 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-03-11 00:03:26,725 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-11 00:03:27,035 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-11 00:03:27,584 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-11 00:03:27,745 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-03-11 00:03:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:28,014 INFO L93 Difference]: Finished difference Result 2362 states and 7709 transitions. [2021-03-11 00:03:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:03:28,015 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-03-11 00:03:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:28,019 INFO L225 Difference]: With dead ends: 2362 [2021-03-11 00:03:28,019 INFO L226 Difference]: Without dead ends: 2328 [2021-03-11 00:03:28,020 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 4466.8ms TimeCoverageRelationStatistics Valid=282, Invalid=1278, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:03:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-03-11 00:03:28,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 1733. [2021-03-11 00:03:28,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1732 states have (on average 3.3804849884526558) internal successors, (5855), 1732 states have internal predecessors, (5855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 5855 transitions. [2021-03-11 00:03:28,051 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 5855 transitions. Word has length 26 [2021-03-11 00:03:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:28,051 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 5855 transitions. [2021-03-11 00:03:28,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 5855 transitions. [2021-03-11 00:03:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:28,054 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:28,054 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] [2021-03-11 00:03:28,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1593,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:28,254 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:28,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:28,255 INFO L82 PathProgramCache]: Analyzing trace with hash -492577331, now seen corresponding path program 44 times [2021-03-11 00:03:28,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:28,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125388220] [2021-03-11 00:03:28,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:28,418 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-03-11 00:03:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:28,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125388220] [2021-03-11 00:03:28,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650689824] [2021-03-11 00:03:28,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:03:28,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:03:28,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:28,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:03:28,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:29,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:29,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:29,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:29,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:29,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:29,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:29,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:03:29,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:29,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:29,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:29,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:29,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:29,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:29,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:29,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:03:29,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:29,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:29,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:29,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:29,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:29,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:29,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:29,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:03:29,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:29,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:29,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:29,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:29,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:29,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:29,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:29,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:03:29,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:29,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:29,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:03:30,011 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:30,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:03:30,031 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:30,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:03:30,049 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:30,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:03:30,074 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:30,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:03:30,096 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:30,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:03:30,115 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:30,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:03:30,137 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:30,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:03:30,155 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:30,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:03:30,176 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:30,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:03:30,197 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:30,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:30,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:30,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:03:30,210 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:30,257 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-03-11 00:03:30,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:03:30,260 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-03-11 00:03:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:30,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:30,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:03:30,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024514600] [2021-03-11 00:03:30,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:03:30,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:30,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:03:30,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:03:30,310 INFO L87 Difference]: Start difference. First operand 1733 states and 5855 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:30,924 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-03-11 00:03:31,325 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-11 00:03:31,549 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-03-11 00:03:32,146 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-03-11 00:03:32,669 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-11 00:03:32,971 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-03-11 00:03:33,114 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-11 00:03:33,335 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-03-11 00:03:33,666 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-11 00:03:33,881 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-03-11 00:03:34,099 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-03-11 00:03:34,645 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-03-11 00:03:34,779 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-03-11 00:03:34,925 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-03-11 00:03:35,254 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-03-11 00:03:35,632 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-03-11 00:03:35,945 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2021-03-11 00:03:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:36,537 INFO L93 Difference]: Finished difference Result 2502 states and 8102 transitions. [2021-03-11 00:03:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:03:36,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:03:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:36,543 INFO L225 Difference]: With dead ends: 2502 [2021-03-11 00:03:36,543 INFO L226 Difference]: Without dead ends: 2480 [2021-03-11 00:03:36,544 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 5716.2ms TimeCoverageRelationStatistics Valid=568, Invalid=2738, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:03:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-03-11 00:03:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 1738. [2021-03-11 00:03:36,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 3.3811168681635) internal successors, (5873), 1737 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5873 transitions. [2021-03-11 00:03:36,568 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5873 transitions. Word has length 26 [2021-03-11 00:03:36,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:36,568 INFO L480 AbstractCegarLoop]: Abstraction has 1738 states and 5873 transitions. [2021-03-11 00:03:36,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:36,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5873 transitions. [2021-03-11 00:03:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:36,571 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:36,571 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] [2021-03-11 00:03:36,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1612 [2021-03-11 00:03:36,771 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:36,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:36,771 INFO L82 PathProgramCache]: Analyzing trace with hash 745320095, now seen corresponding path program 45 times [2021-03-11 00:03:36,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:36,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34435422] [2021-03-11 00:03:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:37,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34435422] [2021-03-11 00:03:37,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748416440] [2021-03-11 00:03:37,280 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:37,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:03:37,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:37,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:03:37,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:38,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:38,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-03-11 00:03:38,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:38,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,532 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-03-11 00:03:38,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-03-11 00:03:38,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:38,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,601 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-03-11 00:03:38,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:03:38,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:38,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,676 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:03:38,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-03-11 00:03:38,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:38,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,725 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:03:38,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:03:38,727 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:38,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,785 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-03-11 00:03:38,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-03-11 00:03:38,789 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:38,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,845 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-03-11 00:03:38,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-03-11 00:03:38,849 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:38,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,886 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:03:38,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-03-11 00:03:38,888 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:38,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,945 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-03-11 00:03:38,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 25 [2021-03-11 00:03:38,949 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:38,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:39,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-03-11 00:03:39,021 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:39,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,062 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:03:39,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:03:39,064 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:39,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,101 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:03:39,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:03:39,103 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:39,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,140 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:03:39,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:03:39,142 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:39,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,197 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-03-11 00:03:39,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-03-11 00:03:39,199 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:39,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,238 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:03:39,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:03:39,241 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:39,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,262 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:03:39,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-03-11 00:03:39,265 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:39,511 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-03-11 00:03:39,512 INFO L628 ElimStorePlain]: treesize reduction 151, result has 43.9 percent of original size [2021-03-11 00:03:39,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:03:39,515 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:133 [2021-03-11 00:03:39,728 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-03-11 00:03:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:39,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:39,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-03-11 00:03:39,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763392022] [2021-03-11 00:03:39,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:03:39,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:39,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:03:39,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:03:39,810 INFO L87 Difference]: Start difference. First operand 1738 states and 5873 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:40,744 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-11 00:03:41,021 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-11 00:03:41,219 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-11 00:03:41,558 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-11 00:03:42,076 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-11 00:03:42,252 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-11 00:03:42,438 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-11 00:03:42,590 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-11 00:03:42,736 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-11 00:03:43,190 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-03-11 00:03:43,420 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-11 00:03:44,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:44,907 INFO L93 Difference]: Finished difference Result 3171 states and 10208 transitions. [2021-03-11 00:03:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:03:44,908 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:03:44,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:44,914 INFO L225 Difference]: With dead ends: 3171 [2021-03-11 00:03:44,914 INFO L226 Difference]: Without dead ends: 3141 [2021-03-11 00:03:44,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 4718.6ms TimeCoverageRelationStatistics Valid=495, Invalid=2475, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:03:44,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3141 states. [2021-03-11 00:03:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3141 to 1793. [2021-03-11 00:03:44,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1793 states, 1792 states have (on average 3.390625) internal successors, (6076), 1792 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:44,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1793 states to 1793 states and 6076 transitions. [2021-03-11 00:03:44,954 INFO L78 Accepts]: Start accepts. Automaton has 1793 states and 6076 transitions. Word has length 26 [2021-03-11 00:03:44,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:44,954 INFO L480 AbstractCegarLoop]: Abstraction has 1793 states and 6076 transitions. [2021-03-11 00:03:44,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:44,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 6076 transitions. [2021-03-11 00:03:44,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:44,957 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:44,957 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] [2021-03-11 00:03:45,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1702,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:45,159 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:45,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:45,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1715998549, now seen corresponding path program 46 times [2021-03-11 00:03:45,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:45,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656632075] [2021-03-11 00:03:45,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:45,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656632075] [2021-03-11 00:03:45,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121638103] [2021-03-11 00:03:45,645 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:45,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:03:45,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:45,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:03:45,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:46,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:46,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-03-11 00:03:46,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:46,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,753 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:03:46,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-03-11 00:03:46,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:46,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,801 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-03-11 00:03:46,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-03-11 00:03:46,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:46,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,823 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:03:46,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-03-11 00:03:46,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:46,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,845 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:03:46,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:03:46,846 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:46,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,867 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:03:46,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:03:46,868 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:46,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,902 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:03:46,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:03:46,908 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:46,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,928 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:03:46,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:03:46,929 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:46,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,948 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:03:46,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-03-11 00:03:46,949 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:46,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,980 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:03:46,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-03-11 00:03:46,982 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:46,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:46,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:47,016 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:03:47,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:03:47,018 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:47,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:47,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:47,055 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:03:47,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:03:47,057 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:47,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:47,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:47,092 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:03:47,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:03:47,094 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:47,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:47,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:47,128 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:03:47,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:03:47,129 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:47,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:47,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:47,162 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:03:47,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-03-11 00:03:47,164 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:47,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:47,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:47,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:47,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-03-11 00:03:47,216 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:47,380 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-11 00:03:47,380 INFO L628 ElimStorePlain]: treesize reduction 28, result has 74.3 percent of original size [2021-03-11 00:03:47,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:03:47,385 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:71 [2021-03-11 00:03:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:47,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:47,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:03:47,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192092922] [2021-03-11 00:03:47,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:03:47,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:47,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:03:47,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:03:47,593 INFO L87 Difference]: Start difference. First operand 1793 states and 6076 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:48,089 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-03-11 00:03:48,494 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-11 00:03:48,757 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-11 00:03:48,961 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-11 00:03:49,252 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-03-11 00:03:49,439 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-11 00:03:50,043 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-11 00:03:50,327 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2021-03-11 00:03:50,519 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-11 00:03:50,665 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-11 00:03:51,275 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-11 00:03:51,456 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-11 00:03:51,737 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-03-11 00:03:52,218 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-11 00:03:53,132 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-11 00:03:53,328 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-03-11 00:03:53,639 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-03-11 00:03:54,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:54,080 INFO L93 Difference]: Finished difference Result 3903 states and 12422 transitions. [2021-03-11 00:03:54,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:03:54,081 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:03:54,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:54,088 INFO L225 Difference]: With dead ends: 3903 [2021-03-11 00:03:54,088 INFO L226 Difference]: Without dead ends: 3846 [2021-03-11 00:03:54,089 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5654.7ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:03:54,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3846 states. [2021-03-11 00:03:54,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3846 to 1921. [2021-03-11 00:03:54,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.4088541666666665) internal successors, (6545), 1920 states have internal predecessors, (6545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6545 transitions. [2021-03-11 00:03:54,136 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6545 transitions. Word has length 26 [2021-03-11 00:03:54,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:54,136 INFO L480 AbstractCegarLoop]: Abstraction has 1921 states and 6545 transitions. [2021-03-11 00:03:54,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:54,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6545 transitions. [2021-03-11 00:03:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:54,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:54,139 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:03:54,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1803,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:54,340 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:54,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:54,340 INFO L82 PathProgramCache]: Analyzing trace with hash 134504147, now seen corresponding path program 27 times [2021-03-11 00:03:54,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:54,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007042078] [2021-03-11 00:03:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:54,605 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2021-03-11 00:03:54,821 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-11 00:03:55,012 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-11 00:03:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:55,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007042078] [2021-03-11 00:03:55,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145189247] [2021-03-11 00:03:55,163 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:55,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:03:55,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:55,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:03:55,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:55,596 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:03:56,083 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:03:56,531 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-03-11 00:03:56,930 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:03:56,931 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-03-11 00:03:56,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:56,955 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:03:56,956 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:03:56,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:57,838 WARN L205 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 127 [2021-03-11 00:03:57,839 INFO L628 ElimStorePlain]: treesize reduction 74, result has 85.2 percent of original size [2021-03-11 00:03:57,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:57,891 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:03:57,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:57,920 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:03:57,921 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:03:57,922 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:58,292 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-03-11 00:03:58,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:58,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:58,328 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:03:58,344 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:58,718 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-03-11 00:03:58,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:58,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:58,749 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:03:58,753 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:58,767 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:03:58,767 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:03:58,769 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:59,241 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 112 [2021-03-11 00:03:59,242 INFO L628 ElimStorePlain]: treesize reduction 23, result has 93.1 percent of original size [2021-03-11 00:03:59,295 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:03:59,295 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:03:59,306 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:59,610 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-11 00:03:59,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:59,653 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:03:59,654 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:03:59,657 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:59,945 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-03-11 00:03:59,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:59,994 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:03:59,994 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:04:00,004 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:00,286 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-11 00:04:00,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:00,332 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:04:00,333 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:04:00,336 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:00,612 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-03-11 00:04:00,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:00,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:04:00,633 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:563, output treesize:331 [2021-03-11 00:04:01,034 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-03-11 00:04:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:01,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:01,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:04:01,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915989927] [2021-03-11 00:04:01,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:04:01,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:01,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:04:01,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:04:01,163 INFO L87 Difference]: Start difference. First operand 1921 states and 6545 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:01,595 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-11 00:04:01,833 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-11 00:04:02,117 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-03-11 00:04:02,551 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-03-11 00:04:03,279 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-11 00:04:03,899 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-03-11 00:04:04,531 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-11 00:04:05,102 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-03-11 00:04:05,466 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-11 00:04:05,959 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-11 00:04:06,769 WARN L205 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2021-03-11 00:04:08,174 WARN L205 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 102 [2021-03-11 00:04:08,749 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 72 [2021-03-11 00:04:09,106 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:04:09,426 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-03-11 00:04:10,129 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 74 [2021-03-11 00:04:10,378 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2021-03-11 00:04:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:10,672 INFO L93 Difference]: Finished difference Result 2697 states and 8826 transitions. [2021-03-11 00:04:10,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:04:10,674 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:04:10,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:10,679 INFO L225 Difference]: With dead ends: 2697 [2021-03-11 00:04:10,679 INFO L226 Difference]: Without dead ends: 2652 [2021-03-11 00:04:10,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 9552.1ms TimeCoverageRelationStatistics Valid=302, Invalid=1678, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:04:10,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-03-11 00:04:10,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1953. [2021-03-11 00:04:10,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 3.4123975409836067) internal successors, (6661), 1952 states have internal predecessors, (6661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 6661 transitions. [2021-03-11 00:04:10,708 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 6661 transitions. Word has length 26 [2021-03-11 00:04:10,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:10,708 INFO L480 AbstractCegarLoop]: Abstraction has 1953 states and 6661 transitions. [2021-03-11 00:04:10,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:10,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 6661 transitions. [2021-03-11 00:04:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:10,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:10,710 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:04:10,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1907 [2021-03-11 00:04:10,911 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:10,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:10,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1483028633, now seen corresponding path program 28 times [2021-03-11 00:04:10,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:10,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224150031] [2021-03-11 00:04:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:11,224 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2021-03-11 00:04:11,542 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-11 00:04:11,763 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-11 00:04:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:11,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224150031] [2021-03-11 00:04:11,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398636772] [2021-03-11 00:04:11,887 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:04:11,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:04:11,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:04:11,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:04:11,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:12,335 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:04:12,795 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:04:13,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:13,098 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:04:13,098 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-03-11 00:04:13,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:13,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:13,128 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:04:13,128 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:04:13,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:14,065 WARN L205 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 156 [2021-03-11 00:04:14,066 INFO L628 ElimStorePlain]: treesize reduction 74, result has 85.2 percent of original size [2021-03-11 00:04:14,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:14,121 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:04:14,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:04:14,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:14,558 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-03-11 00:04:14,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:14,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:14,610 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:04:14,611 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:04:14,614 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:15,034 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-03-11 00:04:15,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:15,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,095 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:04:15,095 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:04:15,098 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:15,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,156 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:04:15,156 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:04:15,159 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:15,876 WARN L205 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 139 [2021-03-11 00:04:15,878 INFO L628 ElimStorePlain]: treesize reduction 31, result has 91.7 percent of original size [2021-03-11 00:04:15,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:15,925 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:04:15,940 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:16,638 WARN L205 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 130 [2021-03-11 00:04:16,639 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-03-11 00:04:16,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:16,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:16,677 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:04:16,699 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,021 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-03-11 00:04:17,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:17,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:17,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:17,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:04:17,082 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:17,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:17,125 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:04:17,133 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,689 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 115 [2021-03-11 00:04:17,690 INFO L628 ElimStorePlain]: treesize reduction 46, result has 84.2 percent of original size [2021-03-11 00:04:17,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:17,738 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:04:17,739 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:04:17,743 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,999 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-11 00:04:18,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:18,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:04:18,038 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:563, output treesize:232 [2021-03-11 00:04:18,511 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-11 00:04:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:18,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:18,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:04:18,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353078284] [2021-03-11 00:04:18,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:04:18,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:18,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:04:18,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:04:18,605 INFO L87 Difference]: Start difference. First operand 1953 states and 6661 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:18,927 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 23 [2021-03-11 00:04:19,528 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-03-11 00:04:19,809 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-11 00:04:20,139 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-11 00:04:20,567 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:04:21,179 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-11 00:04:21,428 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-03-11 00:04:21,676 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-11 00:04:22,518 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-11 00:04:22,784 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-11 00:04:23,071 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2021-03-11 00:04:23,325 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-03-11 00:04:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:23,382 INFO L93 Difference]: Finished difference Result 2994 states and 9857 transitions. [2021-03-11 00:04:23,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:04:23,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:04:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:23,390 INFO L225 Difference]: With dead ends: 2994 [2021-03-11 00:04:23,390 INFO L226 Difference]: Without dead ends: 2960 [2021-03-11 00:04:23,390 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 5535.4ms TimeCoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:04:23,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-03-11 00:04:23,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 1950. [2021-03-11 00:04:23,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 3.414571575166752) internal successors, (6655), 1949 states have internal predecessors, (6655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 6655 transitions. [2021-03-11 00:04:23,437 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 6655 transitions. Word has length 26 [2021-03-11 00:04:23,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:23,437 INFO L480 AbstractCegarLoop]: Abstraction has 1950 states and 6655 transitions. [2021-03-11 00:04:23,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:23,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 6655 transitions. [2021-03-11 00:04:23,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:23,441 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:23,441 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:04:23,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1943 [2021-03-11 00:04:23,641 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:23,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:23,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1121995759, now seen corresponding path program 29 times [2021-03-11 00:04:23,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:23,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923475507] [2021-03-11 00:04:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:23,928 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-03-11 00:04:24,074 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-03-11 00:04:24,209 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-11 00:04:24,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:24,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923475507] [2021-03-11 00:04:24,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788438777] [2021-03-11 00:04:24,329 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:04:24,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:04:24,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:04:24,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:04:24,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:24,794 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:04:25,238 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-03-11 00:04:25,527 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_190, A, v_prenex_187, v_prenex_188], 3=[v_prenex_186]} [2021-03-11 00:04:25,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:25,561 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:04:25,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:04:25,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:25,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:25,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:25,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:04:25,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:26,436 WARN L205 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-03-11 00:04:26,437 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.4 percent of original size [2021-03-11 00:04:26,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:26,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:26,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:04:26,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:26,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:26,513 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:04:26,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:04:26,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:26,900 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-11 00:04:26,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:26,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:26,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:26,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:04:26,947 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:26,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:26,975 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:04:26,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:04:26,979 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:27,344 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:04:27,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:27,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:27,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:27,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:04:27,387 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:27,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:27,413 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:04:27,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:04:27,417 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:27,730 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:04:27,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:27,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:27,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:27,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:27,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-03-11 00:04:27,774 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:27,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:27,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:27,801 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:04:27,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-03-11 00:04:27,806 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:28,079 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-11 00:04:28,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:28,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-11 00:04:28,089 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:421, output treesize:185 [2021-03-11 00:04:28,335 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-03-11 00:04:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:28,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:28,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:04:28,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616854324] [2021-03-11 00:04:28,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:04:28,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:28,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:04:28,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:04:28,464 INFO L87 Difference]: Start difference. First operand 1950 states and 6655 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:28,702 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 24 [2021-03-11 00:04:28,915 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-11 00:04:29,207 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-11 00:04:29,642 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-11 00:04:30,838 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-11 00:04:31,646 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2021-03-11 00:04:32,267 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-03-11 00:04:32,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:32,450 INFO L93 Difference]: Finished difference Result 2625 states and 8728 transitions. [2021-03-11 00:04:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:04:32,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:04:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:32,456 INFO L225 Difference]: With dead ends: 2625 [2021-03-11 00:04:32,456 INFO L226 Difference]: Without dead ends: 2579 [2021-03-11 00:04:32,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 4255.8ms TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:04:32,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2021-03-11 00:04:32,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 1950. [2021-03-11 00:04:32,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 3.414571575166752) internal successors, (6655), 1949 states have internal predecessors, (6655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 6655 transitions. [2021-03-11 00:04:32,494 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 6655 transitions. Word has length 26 [2021-03-11 00:04:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:32,494 INFO L480 AbstractCegarLoop]: Abstraction has 1950 states and 6655 transitions. [2021-03-11 00:04:32,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 6655 transitions. [2021-03-11 00:04:32,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:32,497 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:32,497 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] [2021-03-11 00:04:32,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1988,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:04:32,698 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:32,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:32,698 INFO L82 PathProgramCache]: Analyzing trace with hash -275202939, now seen corresponding path program 47 times [2021-03-11 00:04:32,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:32,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993564357] [2021-03-11 00:04:32,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:32,994 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-11 00:04:33,177 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-03-11 00:04:33,338 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 23 [2021-03-11 00:04:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:33,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993564357] [2021-03-11 00:04:33,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131079770] [2021-03-11 00:04:33,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:04:33,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:04:33,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:04:33,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:04:33,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:34,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:34,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:34,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:34,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:34,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:34,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:34,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:04:34,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:34,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:34,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:34,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:34,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:34,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:34,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:34,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:04:34,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:34,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:34,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:34,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:34,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:34,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:34,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:34,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:04:34,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:34,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:34,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:34,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:34,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:04:35,015 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:04:35,046 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:04:35,074 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:04:35,105 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:04:35,137 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:04:35,166 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:04:35,195 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:04:35,220 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:04:35,249 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:04:35,272 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:04:35,294 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:35,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:04:35,305 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,364 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-03-11 00:04:35,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:04:35,366 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-03-11 00:04:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:35,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:35,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:04:35,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056277021] [2021-03-11 00:04:35,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:04:35,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:35,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:04:35,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:04:35,430 INFO L87 Difference]: Start difference. First operand 1950 states and 6655 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:35,909 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-03-11 00:04:36,074 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2021-03-11 00:04:36,282 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-03-11 00:04:36,585 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-03-11 00:04:36,827 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-03-11 00:04:37,132 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-03-11 00:04:37,485 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-03-11 00:04:37,730 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-03-11 00:04:37,929 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-03-11 00:04:38,117 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-03-11 00:04:38,705 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-03-11 00:04:38,927 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-03-11 00:04:39,137 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2021-03-11 00:04:39,885 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:04:40,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:40,094 INFO L93 Difference]: Finished difference Result 2429 states and 8077 transitions. [2021-03-11 00:04:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:04:40,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:04:40,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:40,101 INFO L225 Difference]: With dead ends: 2429 [2021-03-11 00:04:40,101 INFO L226 Difference]: Without dead ends: 2407 [2021-03-11 00:04:40,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 4463.8ms TimeCoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:04:40,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-03-11 00:04:40,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1946. [2021-03-11 00:04:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1945 states have (on average 3.413367609254499) internal successors, (6639), 1945 states have internal predecessors, (6639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 6639 transitions. [2021-03-11 00:04:40,136 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 6639 transitions. Word has length 26 [2021-03-11 00:04:40,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:40,136 INFO L480 AbstractCegarLoop]: Abstraction has 1946 states and 6639 transitions. [2021-03-11 00:04:40,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:40,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 6639 transitions. [2021-03-11 00:04:40,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:40,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:40,139 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] [2021-03-11 00:04:40,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2025 [2021-03-11 00:04:40,341 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:40,341 INFO L82 PathProgramCache]: Analyzing trace with hash 650290927, now seen corresponding path program 48 times [2021-03-11 00:04:40,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:40,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228032289] [2021-03-11 00:04:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:40,714 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-11 00:04:40,951 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-11 00:04:41,148 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2021-03-11 00:04:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:41,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228032289] [2021-03-11 00:04:41,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051267145] [2021-03-11 00:04:41,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:04:41,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:04:41,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:04:41,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:04:41,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:42,053 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-03-11 00:04:42,197 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_193], 5=[v_prenex_191, v_prenex_195]} [2021-03-11 00:04:42,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:42,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:42,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:42,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:42,217 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 28 treesize of output 13 [2021-03-11 00:04:42,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:42,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:42,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:42,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:42,234 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 23 treesize of output 13 [2021-03-11 00:04:42,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:42,456 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-03-11 00:04:42,457 INFO L628 ElimStorePlain]: treesize reduction 130, result has 40.1 percent of original size [2021-03-11 00:04:42,457 INFO L518 ElimStorePlain]: Eliminatee v_prenex_193 vanished before elimination [2021-03-11 00:04:42,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:42,464 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 27 treesize of output 13 [2021-03-11 00:04:42,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:42,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:42,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:42,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:42,550 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 27 treesize of output 13 [2021-03-11 00:04:42,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:42,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:42,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:04:42,619 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:29 [2021-03-11 00:04:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:42,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:42,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:04:42,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241468013] [2021-03-11 00:04:42,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:04:42,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:42,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:04:42,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:04:42,732 INFO L87 Difference]: Start difference. First operand 1946 states and 6639 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:43,447 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-03-11 00:04:43,586 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-11 00:04:43,772 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-03-11 00:04:43,926 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 24 [2021-03-11 00:04:44,278 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-11 00:04:44,417 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-03-11 00:04:44,802 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-03-11 00:04:45,029 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2021-03-11 00:04:45,249 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-11 00:04:45,460 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-11 00:04:45,715 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-11 00:04:46,226 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-11 00:04:46,505 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-11 00:04:47,046 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-11 00:04:47,633 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:04:47,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:47,814 INFO L93 Difference]: Finished difference Result 2677 states and 8873 transitions. [2021-03-11 00:04:47,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:04:47,817 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:04:47,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:47,822 INFO L225 Difference]: With dead ends: 2677 [2021-03-11 00:04:47,822 INFO L226 Difference]: Without dead ends: 2662 [2021-03-11 00:04:47,822 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 5024.1ms TimeCoverageRelationStatistics Valid=440, Invalid=1722, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:04:47,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-03-11 00:04:47,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 1946. [2021-03-11 00:04:47,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1945 states have (on average 3.413367609254499) internal successors, (6639), 1945 states have internal predecessors, (6639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 6639 transitions. [2021-03-11 00:04:47,858 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 6639 transitions. Word has length 26 [2021-03-11 00:04:47,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:47,858 INFO L480 AbstractCegarLoop]: Abstraction has 1946 states and 6639 transitions. [2021-03-11 00:04:47,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 6639 transitions. [2021-03-11 00:04:47,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:47,862 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:47,862 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] [2021-03-11 00:04:48,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2115 [2021-03-11 00:04:48,062 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:48,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:48,062 INFO L82 PathProgramCache]: Analyzing trace with hash -527613613, now seen corresponding path program 49 times [2021-03-11 00:04:48,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:48,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205540288] [2021-03-11 00:04:48,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:48,396 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-11 00:04:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:48,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205540288] [2021-03-11 00:04:48,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092115683] [2021-03-11 00:04:48,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:04:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:48,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:04:48,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:49,409 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:04:50,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:04:50,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:04:50,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:04:50,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:04:50,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:04:50,302 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:04:50,328 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:04:50,351 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:04:50,375 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:04:50,397 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:04:50,422 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:04:50,445 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:04:50,469 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:04:50,493 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:04:50,517 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:04:50,530 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,598 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-03-11 00:04:50,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:04:50,601 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-03-11 00:04:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:50,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:50,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:04:50,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732343795] [2021-03-11 00:04:50,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:04:50,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:50,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:04:50,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:04:50,694 INFO L87 Difference]: Start difference. First operand 1946 states and 6639 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:51,090 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-03-11 00:04:51,351 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-11 00:04:51,863 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-11 00:04:52,053 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-11 00:04:52,372 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-11 00:04:52,701 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-03-11 00:04:53,065 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-03-11 00:04:53,938 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-11 00:04:54,264 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-11 00:04:54,464 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-11 00:04:54,662 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-11 00:04:55,285 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-11 00:04:55,488 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-11 00:04:56,000 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-11 00:04:56,232 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:04:56,515 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-11 00:04:56,888 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-11 00:04:57,151 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-11 00:04:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:57,331 INFO L93 Difference]: Finished difference Result 3062 states and 10015 transitions. [2021-03-11 00:04:57,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:04:57,334 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:04:57,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:57,339 INFO L225 Difference]: With dead ends: 3062 [2021-03-11 00:04:57,339 INFO L226 Difference]: Without dead ends: 3026 [2021-03-11 00:04:57,340 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 5935.2ms TimeCoverageRelationStatistics Valid=486, Invalid=2376, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:04:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-03-11 00:04:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2026. [2021-03-11 00:04:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 3.4024691358024692) internal successors, (6890), 2025 states have internal predecessors, (6890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 6890 transitions. [2021-03-11 00:04:57,381 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 6890 transitions. Word has length 26 [2021-03-11 00:04:57,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:57,381 INFO L480 AbstractCegarLoop]: Abstraction has 2026 states and 6890 transitions. [2021-03-11 00:04:57,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:57,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 6890 transitions. [2021-03-11 00:04:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:57,384 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:57,385 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] [2021-03-11 00:04:57,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2129,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:04:57,585 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:57,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1306035039, now seen corresponding path program 50 times [2021-03-11 00:04:57,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:57,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118038111] [2021-03-11 00:04:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:57,931 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-11 00:04:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:58,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118038111] [2021-03-11 00:04:58,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870556711] [2021-03-11 00:04:58,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:04:58,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:04:58,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:04:58,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:04:58,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:58,766 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:04:58,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:58,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:58,963 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-03-11 00:04:58,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2021-03-11 00:04:58,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:58,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:58,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:59,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-03-11 00:04:59,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:59,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,069 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-03-11 00:04:59,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-03-11 00:04:59,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:59,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,094 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:04:59,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:04:59,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:59,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,131 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-03-11 00:04:59,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:04:59,134 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:59,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,156 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:04:59,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:04:59,157 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:59,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,178 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:04:59,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-03-11 00:04:59,180 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:59,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,202 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:04:59,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:04:59,203 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:59,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,242 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-03-11 00:04:59,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-03-11 00:04:59,245 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:59,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,299 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:04:59,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:04:59,302 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:59,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,383 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-03-11 00:04:59,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:04:59,397 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:59,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,478 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-03-11 00:04:59,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-03-11 00:04:59,483 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:59,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,530 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:04:59,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:04:59,533 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:59,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,580 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:04:59,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:04:59,582 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:59,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,629 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:04:59,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-03-11 00:04:59,631 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:59,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:59,660 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:04:59,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:04:59,663 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:59,891 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-03-11 00:04:59,892 INFO L628 ElimStorePlain]: treesize reduction 45, result has 63.4 percent of original size [2021-03-11 00:04:59,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:04:59,894 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:78 [2021-03-11 00:05:00,053 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-11 00:05:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:00,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:05:00,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-03-11 00:05:00,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626167306] [2021-03-11 00:05:00,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:05:00,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:05:00,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:05:00,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:05:00,193 INFO L87 Difference]: Start difference. First operand 2026 states and 6890 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:00,655 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-03-11 00:05:01,043 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-03-11 00:05:01,288 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-11 00:05:01,546 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-11 00:05:01,788 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-11 00:05:02,151 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-11 00:05:02,667 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-11 00:05:03,130 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-11 00:05:03,544 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-03-11 00:05:04,009 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-11 00:05:04,276 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-11 00:05:05,071 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-11 00:05:05,443 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-03-11 00:05:05,738 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-03-11 00:05:05,974 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-11 00:05:06,169 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-11 00:05:06,422 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-11 00:05:07,210 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-03-11 00:05:07,545 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-11 00:05:07,783 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-11 00:05:08,046 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-11 00:05:08,323 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-11 00:05:08,576 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:05:08,748 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:05:09,322 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-11 00:05:09,791 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-11 00:05:10,267 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:05:10,559 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-11 00:05:11,050 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:05:11,280 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 14 [2021-03-11 00:05:11,479 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:05:11,707 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-03-11 00:05:12,085 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-03-11 00:05:12,326 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:05:12,685 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2021-03-11 00:05:13,231 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-03-11 00:05:13,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:05:13,370 INFO L93 Difference]: Finished difference Result 3611 states and 11523 transitions. [2021-03-11 00:05:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-11 00:05:13,373 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:05:13,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:05:13,380 INFO L225 Difference]: With dead ends: 3611 [2021-03-11 00:05:13,380 INFO L226 Difference]: Without dead ends: 3554 [2021-03-11 00:05:13,380 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 11326.0ms TimeCoverageRelationStatistics Valid=843, Invalid=3579, Unknown=0, NotChecked=0, Total=4422 [2021-03-11 00:05:13,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3554 states. [2021-03-11 00:05:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3554 to 2039. [2021-03-11 00:05:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 3.39450441609421) internal successors, (6918), 2038 states have internal predecessors, (6918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 6918 transitions. [2021-03-11 00:05:13,425 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 6918 transitions. Word has length 26 [2021-03-11 00:05:13,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:05:13,425 INFO L480 AbstractCegarLoop]: Abstraction has 2039 states and 6918 transitions. [2021-03-11 00:05:13,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 6918 transitions. [2021-03-11 00:05:13,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:05:13,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:05:13,429 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] [2021-03-11 00:05:13,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2225,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:05:13,644 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:05:13,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:05:13,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2073850769, now seen corresponding path program 51 times [2021-03-11 00:05:13,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:05:13,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148892571] [2021-03-11 00:05:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:05:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:05:14,034 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-11 00:05:14,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:14,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148892571] [2021-03-11 00:05:14,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483609500] [2021-03-11 00:05:14,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:05:14,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:05:14,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:05:14,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:05:14,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:05:15,166 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:05:16,382 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2021-03-11 00:05:16,384 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-03-11 00:05:16,384 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 28 treesize of output 44 [2021-03-11 00:05:16,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:16,601 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-11 00:05:16,602 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-03-11 00:05:16,603 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 33 treesize of output 51 [2021-03-11 00:05:16,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:17,977 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 171 [2021-03-11 00:05:17,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:18,182 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-11 00:05:18,183 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-03-11 00:05:18,183 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 33 treesize of output 51 [2021-03-11 00:05:18,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:18,382 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-11 00:05:18,383 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-03-11 00:05:18,383 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 33 treesize of output 59 [2021-03-11 00:05:18,411 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:22,941 WARN L205 SmtUtils]: Spent 4.53 s on a formula simplification. DAG size of input: 177 DAG size of output: 169 [2021-03-11 00:05:22,942 INFO L628 ElimStorePlain]: treesize reduction 41, result has 95.4 percent of original size [2021-03-11 00:05:23,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:23,106 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 35 treesize of output 67 [2021-03-11 00:05:23,149 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:23,314 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2021-03-11 00:05:23,315 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-03-11 00:05:23,315 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 35 treesize of output 43 [2021-03-11 00:05:23,332 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:27,839 WARN L205 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 188 DAG size of output: 166 [2021-03-11 00:05:27,840 INFO L628 ElimStorePlain]: treesize reduction 111, result has 88.3 percent of original size [2021-03-11 00:05:28,089 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-11 00:05:28,090 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-03-11 00:05:28,091 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 33 treesize of output 59 [2021-03-11 00:05:28,116 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:28,320 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-11 00:05:28,321 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-03-11 00:05:28,321 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 28 treesize of output 56 [2021-03-11 00:05:28,390 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:32,795 WARN L205 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 169 DAG size of output: 158 [2021-03-11 00:05:32,797 INFO L628 ElimStorePlain]: treesize reduction 38, result has 95.6 percent of original size [2021-03-11 00:05:33,055 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-11 00:05:33,056 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-03-11 00:05:33,056 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 31 treesize of output 51 [2021-03-11 00:05:33,069 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:33,257 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-11 00:05:33,258 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-03-11 00:05:33,258 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 26 treesize of output 52 [2021-03-11 00:05:33,294 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:34,786 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 153 [2021-03-11 00:05:34,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:34,991 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2021-03-11 00:05:34,992 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-03-11 00:05:34,992 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 28 treesize of output 44 [2021-03-11 00:05:35,005 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:35,195 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-11 00:05:35,196 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-03-11 00:05:35,196 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 28 treesize of output 56 [2021-03-11 00:05:35,258 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:37,916 WARN L205 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 148 DAG size of output: 142 [2021-03-11 00:05:37,917 INFO L628 ElimStorePlain]: treesize reduction 63, result has 92.2 percent of original size [2021-03-11 00:05:38,010 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-03-11 00:05:38,010 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 26 treesize of output 52 [2021-03-11 00:05:38,023 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:38,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:38,079 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 21 treesize of output 61 [2021-03-11 00:05:38,112 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:39,411 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 133 [2021-03-11 00:05:39,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:39,692 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-11 00:05:39,693 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-03-11 00:05:39,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 59 [2021-03-11 00:05:39,720 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:39,933 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-11 00:05:39,934 INFO L354 Elim1Store]: treesize reduction 4, result has 91.8 percent of original size [2021-03-11 00:05:39,934 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 35 treesize of output 63 [2021-03-11 00:05:39,968 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:44,000 WARN L205 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 148 DAG size of output: 138 [2021-03-11 00:05:44,001 INFO L628 ElimStorePlain]: treesize reduction 83, result has 89.6 percent of original size [2021-03-11 00:05:44,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-03-11 00:05:44,210 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:865, output treesize:3942 [2021-03-11 00:05:48,324 WARN L205 SmtUtils]: Spent 3.94 s on a formula simplification. DAG size of input: 185 DAG size of output: 90 [2021-03-11 00:05:49,489 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-03-11 00:05:50,018 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-11 00:05:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:50,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:05:50,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-11 00:05:50,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543747746] [2021-03-11 00:05:50,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:05:50,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:05:50,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:05:50,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:05:50,130 INFO L87 Difference]: Start difference. First operand 2039 states and 6918 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:50,520 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-11 00:05:51,122 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 27 [2021-03-11 00:05:51,387 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-03-11 00:05:51,824 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-03-11 00:05:52,126 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-03-11 00:05:52,456 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-11 00:05:52,955 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-11 00:05:53,261 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 24 [2021-03-11 00:05:53,529 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-11 00:05:54,174 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 38 [2021-03-11 00:05:54,482 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2021-03-11 00:05:55,384 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-11 00:05:55,808 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-11 00:05:56,465 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-03-11 00:05:56,726 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-11 00:05:57,040 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-11 00:05:57,266 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-11 00:05:57,908 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 29 [2021-03-11 00:06:00,690 WARN L205 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 103 DAG size of output: 77 [2021-03-11 00:06:01,391 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-11 00:06:04,119 WARN L205 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 125 DAG size of output: 66 [2021-03-11 00:06:07,394 WARN L205 SmtUtils]: Spent 3.13 s on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2021-03-11 00:06:08,544 WARN L205 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-03-11 00:06:09,799 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-03-11 00:06:09,998 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-03-11 00:06:11,159 WARN L205 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 51 [2021-03-11 00:06:13,357 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 113 DAG size of output: 60 [2021-03-11 00:06:16,126 WARN L205 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 98 DAG size of output: 61 [2021-03-11 00:06:17,937 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 122 DAG size of output: 43 [2021-03-11 00:06:18,828 WARN L205 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 25 [2021-03-11 00:06:19,782 WARN L205 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 29 [2021-03-11 00:06:20,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:20,028 INFO L93 Difference]: Finished difference Result 3222 states and 10485 transitions. [2021-03-11 00:06:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-11 00:06:20,031 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:06:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:20,038 INFO L225 Difference]: With dead ends: 3222 [2021-03-11 00:06:20,038 INFO L226 Difference]: Without dead ends: 3177 [2021-03-11 00:06:20,038 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 33757.6ms TimeCoverageRelationStatistics Valid=670, Invalid=3362, Unknown=0, NotChecked=0, Total=4032 [2021-03-11 00:06:20,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3177 states. [2021-03-11 00:06:20,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3177 to 2048. [2021-03-11 00:06:20,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 3.398143624816805) internal successors, (6956), 2047 states have internal predecessors, (6956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 6956 transitions. [2021-03-11 00:06:20,084 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 6956 transitions. Word has length 26 [2021-03-11 00:06:20,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:20,084 INFO L480 AbstractCegarLoop]: Abstraction has 2048 states and 6956 transitions. [2021-03-11 00:06:20,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:20,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 6956 transitions. [2021-03-11 00:06:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:06:20,088 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:20,088 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] [2021-03-11 00:06:20,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2253,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:20,304 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:20,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:20,304 INFO L82 PathProgramCache]: Analyzing trace with hash 436262311, now seen corresponding path program 52 times [2021-03-11 00:06:20,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:20,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503893651] [2021-03-11 00:06:20,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:20,532 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-03-11 00:06:20,692 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-11 00:06:20,873 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-11 00:06:21,002 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-11 00:06:21,125 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-11 00:06:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:21,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503893651] [2021-03-11 00:06:21,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885890288] [2021-03-11 00:06:21,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:21,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:06:21,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:21,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:06:21,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:21,980 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:06:22,628 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-11 00:06:23,135 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_221], 5=[v_prenex_217, v_prenex_219]} [2021-03-11 00:06:23,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:23,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:23,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:23,151 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 23 treesize of output 13 [2021-03-11 00:06:23,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:23,477 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-11 00:06:23,479 INFO L628 ElimStorePlain]: treesize reduction 131, result has 44.5 percent of original size [2021-03-11 00:06:23,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:23,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:23,490 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 25 treesize of output 13 [2021-03-11 00:06:23,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:23,599 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:06:23,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:23,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:23,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:23,610 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 27 treesize of output 13 [2021-03-11 00:06:23,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:23,715 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:06:23,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:23,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:23,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:23,728 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 25 treesize of output 13 [2021-03-11 00:06:23,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:23,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:23,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:06:23,826 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:29 [2021-03-11 00:06:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:24,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:24,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:06:24,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69017673] [2021-03-11 00:06:24,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:06:24,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:24,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:06:24,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:06:24,001 INFO L87 Difference]: Start difference. First operand 2048 states and 6956 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:24,335 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-03-11 00:06:24,641 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2021-03-11 00:06:24,863 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2021-03-11 00:06:25,182 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-11 00:06:25,416 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2021-03-11 00:06:25,686 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 24 [2021-03-11 00:06:26,171 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2021-03-11 00:06:26,454 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-03-11 00:06:26,947 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-11 00:06:27,099 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-11 00:06:27,482 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-03-11 00:06:27,778 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-11 00:06:28,029 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-11 00:06:28,417 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-11 00:06:28,853 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-03-11 00:06:29,005 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-11 00:06:29,274 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-03-11 00:06:29,554 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-03-11 00:06:30,208 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-03-11 00:06:30,873 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-03-11 00:06:31,586 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-03-11 00:06:32,115 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-03-11 00:06:32,414 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-03-11 00:06:33,267 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-03-11 00:06:34,154 WARN L205 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-03-11 00:06:34,641 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-03-11 00:06:34,844 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-11 00:06:35,212 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-03-11 00:06:36,007 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-03-11 00:06:36,553 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-11 00:06:37,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:37,082 INFO L93 Difference]: Finished difference Result 2766 states and 9115 transitions. [2021-03-11 00:06:37,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:06:37,086 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:06:37,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:37,092 INFO L225 Difference]: With dead ends: 2766 [2021-03-11 00:06:37,092 INFO L226 Difference]: Without dead ends: 2751 [2021-03-11 00:06:37,092 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 12006.0ms TimeCoverageRelationStatistics Valid=534, Invalid=2658, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:06:37,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-03-11 00:06:37,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2046. [2021-03-11 00:06:37,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2045 states have (on average 3.398044009779951) internal successors, (6949), 2045 states have internal predecessors, (6949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:37,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 6949 transitions. [2021-03-11 00:06:37,132 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 6949 transitions. Word has length 26 [2021-03-11 00:06:37,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:37,132 INFO L480 AbstractCegarLoop]: Abstraction has 2046 states and 6949 transitions. [2021-03-11 00:06:37,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:37,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 6949 transitions. [2021-03-11 00:06:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:06:37,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:37,136 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] [2021-03-11 00:06:37,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2465 [2021-03-11 00:06:37,336 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:37,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:37,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2135160291, now seen corresponding path program 53 times [2021-03-11 00:06:37,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:37,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386783685] [2021-03-11 00:06:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:37,693 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-11 00:06:37,887 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-11 00:06:38,131 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-11 00:06:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:38,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386783685] [2021-03-11 00:06:38,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181830917] [2021-03-11 00:06:38,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:38,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:06:38,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:38,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:06:38,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:40,165 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:06:40,843 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-03-11 00:06:41,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:41,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:41,711 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:06:41,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-03-11 00:06:41,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:41,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:41,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:41,825 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:06:41,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-03-11 00:06:41,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:43,168 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 163 [2021-03-11 00:06:43,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:43,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:43,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:43,329 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:06:43,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-03-11 00:06:43,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:43,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:43,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:43,406 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:06:43,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:06:43,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:44,657 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 151 [2021-03-11 00:06:44,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:44,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:44,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:44,794 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:06:44,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:06:44,809 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:44,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:44,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:44,856 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:06:44,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:06:44,860 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:45,885 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 139 [2021-03-11 00:06:45,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:45,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:45,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:46,011 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-03-11 00:06:46,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-03-11 00:06:46,019 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:46,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:46,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:46,133 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:06:46,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-03-11 00:06:46,140 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:47,178 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 132 [2021-03-11 00:06:47,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:47,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:47,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:47,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:47,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-03-11 00:06:47,323 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:47,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:47,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:47,417 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:06:47,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-03-11 00:06:47,431 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:50,248 WARN L205 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 132 DAG size of output: 120 [2021-03-11 00:06:50,249 INFO L628 ElimStorePlain]: treesize reduction 47, result has 91.6 percent of original size [2021-03-11 00:06:50,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:50,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:50,384 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:06:50,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-03-11 00:06:50,390 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:50,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:50,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:50,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:50,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-03-11 00:06:50,510 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:52,209 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 115 DAG size of output: 112 [2021-03-11 00:06:52,210 INFO L628 ElimStorePlain]: treesize reduction 33, result has 93.0 percent of original size [2021-03-11 00:06:52,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:52,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:52,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:52,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-03-11 00:06:52,356 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:52,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:52,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:52,448 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:06:52,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-03-11 00:06:52,458 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,260 WARN L205 SmtUtils]: Spent 801.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-11 00:06:53,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:53,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,436 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-11 00:06:53,438 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-03-11 00:06:53,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-03-11 00:06:53,466 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,569 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:06:53,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-03-11 00:06:53,587 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:54,361 WARN L205 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-11 00:06:54,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:54,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-03-11 00:06:54,395 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:793, output treesize:363 [2021-03-11 00:06:54,647 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 23 [2021-03-11 00:06:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:54,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:54,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-03-11 00:06:54,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693175660] [2021-03-11 00:06:54,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:06:54,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:54,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:06:54,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:06:54,778 INFO L87 Difference]: Start difference. First operand 2046 states and 6949 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:55,121 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-03-11 00:06:55,318 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-03-11 00:06:55,531 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-03-11 00:06:55,976 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-11 00:06:56,371 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-03-11 00:06:56,850 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-11 00:06:57,200 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 24 [2021-03-11 00:06:57,544 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2021-03-11 00:06:57,784 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:06:58,760 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-11 00:06:59,035 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-11 00:06:59,370 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-11 00:06:59,746 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:07:00,471 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-03-11 00:07:00,713 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:07:00,935 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:07:06,349 WARN L205 SmtUtils]: Spent 4.84 s on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-03-11 00:07:06,609 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-03-11 00:07:16,761 WARN L205 SmtUtils]: Spent 9.45 s on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-03-11 00:07:19,173 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 169 DAG size of output: 150 [2021-03-11 00:07:20,073 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-11 00:07:20,425 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:07:21,411 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-11 00:07:21,692 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-11 00:07:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:22,008 INFO L93 Difference]: Finished difference Result 2908 states and 9598 transitions. [2021-03-11 00:07:22,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:07:22,012 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:07:22,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:22,018 INFO L225 Difference]: With dead ends: 2908 [2021-03-11 00:07:22,018 INFO L226 Difference]: Without dead ends: 2878 [2021-03-11 00:07:22,019 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 27243.5ms TimeCoverageRelationStatistics Valid=544, Invalid=2536, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:07:22,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2878 states. [2021-03-11 00:07:22,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2878 to 2058. [2021-03-11 00:07:22,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 3.3986387943607195) internal successors, (6991), 2057 states have internal predecessors, (6991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:22,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 6991 transitions. [2021-03-11 00:07:22,066 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 6991 transitions. Word has length 26 [2021-03-11 00:07:22,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:22,066 INFO L480 AbstractCegarLoop]: Abstraction has 2058 states and 6991 transitions. [2021-03-11 00:07:22,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:22,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 6991 transitions. [2021-03-11 00:07:22,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:22,070 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:22,070 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] [2021-03-11 00:07:22,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2479 [2021-03-11 00:07:22,285 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:22,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:22,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1245974955, now seen corresponding path program 54 times [2021-03-11 00:07:22,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:22,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961726130] [2021-03-11 00:07:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:22,500 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-11 00:07:22,724 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-11 00:07:23,077 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-11 00:07:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:23,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961726130] [2021-03-11 00:07:23,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796865282] [2021-03-11 00:07:23,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:07:23,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:07:23,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:07:23,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:07:23,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:23,819 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:07:24,084 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:07:24,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:24,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:24,379 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-03-11 00:07:24,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 27 [2021-03-11 00:07:24,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:24,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:24,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:24,512 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-03-11 00:07:24,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-03-11 00:07:24,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:24,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:24,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:24,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:24,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-03-11 00:07:24,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:24,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:24,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:24,840 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-03-11 00:07:24,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 31 [2021-03-11 00:07:24,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:24,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:24,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:24,974 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-03-11 00:07:24,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:07:24,982 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:24,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:25,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 45 [2021-03-11 00:07:25,139 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:25,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,219 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:07:25,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:07:25,224 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:25,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:25,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-03-11 00:07:25,394 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:25,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,520 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-03-11 00:07:25,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 23 [2021-03-11 00:07:25,526 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:25,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,601 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:07:25,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-03-11 00:07:25,606 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:25,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,687 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:07:25,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:07:25,692 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:25,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,771 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:07:25,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:07:25,774 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:25,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,854 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:07:25,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:07:25,859 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:25,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,935 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:07:25,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:07:25,939 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:25,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:25,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:26,048 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-03-11 00:07:26,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-03-11 00:07:26,056 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:26,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:26,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:26,094 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:07:26,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:07:26,099 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:26,451 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2021-03-11 00:07:26,452 INFO L628 ElimStorePlain]: treesize reduction 135, result has 33.8 percent of original size [2021-03-11 00:07:26,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:07:26,455 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:69 [2021-03-11 00:07:26,679 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-11 00:07:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:26,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:07:26,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-03-11 00:07:26,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876813342] [2021-03-11 00:07:26,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:07:26,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:07:26,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:07:26,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:07:26,914 INFO L87 Difference]: Start difference. First operand 2058 states and 6991 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:27,153 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-03-11 00:07:27,565 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-11 00:07:28,007 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-03-11 00:07:28,445 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2021-03-11 00:07:28,936 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-03-11 00:07:29,413 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-11 00:07:29,813 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-11 00:07:29,995 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:07:30,342 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-11 00:07:30,688 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-11 00:07:30,874 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:07:31,257 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-03-11 00:07:31,591 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2021-03-11 00:07:32,386 WARN L205 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-03-11 00:07:33,200 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-03-11 00:07:33,554 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-11 00:07:34,176 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-11 00:07:35,187 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-03-11 00:07:35,408 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-03-11 00:07:35,884 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-11 00:07:36,470 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-03-11 00:07:36,907 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-03-11 00:07:37,267 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-11 00:07:37,910 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-03-11 00:07:38,443 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-03-11 00:07:38,795 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-11 00:07:38,995 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:07:39,195 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:07:39,616 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-11 00:07:40,381 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-03-11 00:07:40,891 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-03-11 00:07:41,262 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:07:41,866 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-03-11 00:07:42,732 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-03-11 00:07:43,869 WARN L205 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-03-11 00:07:44,295 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-11 00:07:44,989 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-11 00:07:45,317 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-11 00:07:45,946 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-03-11 00:07:47,817 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-03-11 00:07:48,786 WARN L205 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-03-11 00:07:49,183 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:07:49,552 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-11 00:07:49,834 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-11 00:07:50,570 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-11 00:07:51,890 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2021-03-11 00:07:52,424 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:07:52,689 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-03-11 00:07:53,258 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-11 00:07:53,569 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:07:54,722 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-11 00:07:55,035 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-03-11 00:07:55,383 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-03-11 00:07:56,053 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-11 00:07:56,322 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:07:56,954 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-11 00:07:57,403 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-11 00:07:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:57,629 INFO L93 Difference]: Finished difference Result 3943 states and 12667 transitions. [2021-03-11 00:07:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-03-11 00:07:57,632 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:07:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:57,640 INFO L225 Difference]: With dead ends: 3943 [2021-03-11 00:07:57,641 INFO L226 Difference]: Without dead ends: 3907 [2021-03-11 00:07:57,641 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2769 ImplicationChecksByTransitivity, 27135.5ms TimeCoverageRelationStatistics Valid=1545, Invalid=6111, Unknown=0, NotChecked=0, Total=7656 [2021-03-11 00:07:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-03-11 00:07:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 2227. [2021-03-11 00:07:57,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2226 states have (on average 3.4065588499550765) internal successors, (7583), 2226 states have internal predecessors, (7583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 7583 transitions. [2021-03-11 00:07:57,701 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 7583 transitions. Word has length 26 [2021-03-11 00:07:57,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:57,701 INFO L480 AbstractCegarLoop]: Abstraction has 2227 states and 7583 transitions. [2021-03-11 00:07:57,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:57,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 7583 transitions. [2021-03-11 00:07:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:57,705 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:57,705 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:07:57,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2549,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:07:57,910 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:57,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:57,911 INFO L82 PathProgramCache]: Analyzing trace with hash -344448797, now seen corresponding path program 30 times [2021-03-11 00:07:57,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:57,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617097132] [2021-03-11 00:07:57,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:58,303 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-11 00:07:58,458 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:07:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:58,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617097132] [2021-03-11 00:07:58,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419955209] [2021-03-11 00:07:58,628 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:07:58,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:07:58,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:07:58,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:07:58,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:59,494 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:07:59,852 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:08:01,188 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2021-03-11 00:08:01,189 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:08:01,189 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 21 treesize of output 29 [2021-03-11 00:08:01,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:01,324 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 16 treesize of output 34 [2021-03-11 00:08:01,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:02,140 WARN L205 SmtUtils]: Spent 771.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:08:02,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:02,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:02,277 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 30 treesize of output 40 [2021-03-11 00:08:02,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:02,448 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2021-03-11 00:08:02,449 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:08:02,450 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 30 treesize of output 32 [2021-03-11 00:08:02,462 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:03,094 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:08:03,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:03,245 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2021-03-11 00:08:03,246 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:08:03,246 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 30 treesize of output 32 [2021-03-11 00:08:03,259 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:03,381 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:08:03,381 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 30 treesize of output 32 [2021-03-11 00:08:03,387 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:03,966 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:08:03,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:04,111 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2021-03-11 00:08:04,113 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:08:04,113 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 26 treesize of output 32 [2021-03-11 00:08:04,119 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:04,238 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:08:04,238 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 21 treesize of output 29 [2021-03-11 00:08:04,257 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:04,883 WARN L205 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-11 00:08:04,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:04,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:08:04,955 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:345, output treesize:607 [2021-03-11 00:08:07,186 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2021-03-11 00:08:07,847 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-03-11 00:08:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:08,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:08,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-11 00:08:08,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345670951] [2021-03-11 00:08:08,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:08:08,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:08,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:08:08,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:08:08,028 INFO L87 Difference]: Start difference. First operand 2227 states and 7583 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:08,493 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 19 [2021-03-11 00:08:08,727 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 19 [2021-03-11 00:08:09,703 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-11 00:08:10,377 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-03-11 00:08:11,238 WARN L205 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 57 [2021-03-11 00:08:12,087 WARN L205 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-11 00:08:12,461 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:08:13,070 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2021-03-11 00:08:13,475 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2021-03-11 00:08:13,961 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 38 [2021-03-11 00:08:15,554 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 92 DAG size of output: 45 [2021-03-11 00:08:17,231 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 116 DAG size of output: 52 [2021-03-11 00:08:17,874 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 19 [2021-03-11 00:08:18,264 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 24 [2021-03-11 00:08:20,089 WARN L205 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 129 DAG size of output: 63 [2021-03-11 00:08:20,684 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2021-03-11 00:08:22,053 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 65 [2021-03-11 00:08:23,296 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 106 DAG size of output: 45 [2021-03-11 00:08:23,603 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-11 00:08:24,222 WARN L205 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 26 [2021-03-11 00:08:24,948 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 73 [2021-03-11 00:08:26,067 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-03-11 00:08:27,165 WARN L205 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 70 [2021-03-11 00:08:28,517 WARN L205 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-03-11 00:08:29,674 WARN L205 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-03-11 00:08:29,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:29,861 INFO L93 Difference]: Finished difference Result 2885 states and 9535 transitions. [2021-03-11 00:08:29,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:08:29,866 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-03-11 00:08:29,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:29,872 INFO L225 Difference]: With dead ends: 2885 [2021-03-11 00:08:29,872 INFO L226 Difference]: Without dead ends: 2870 [2021-03-11 00:08:29,872 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 22719.3ms TimeCoverageRelationStatistics Valid=388, Invalid=1964, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:08:29,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-03-11 00:08:29,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2222. [2021-03-11 00:08:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2222 states, 2221 states have (on average 3.4074741107609183) internal successors, (7568), 2221 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 7568 transitions. [2021-03-11 00:08:29,915 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 7568 transitions. Word has length 26 [2021-03-11 00:08:29,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:29,915 INFO L480 AbstractCegarLoop]: Abstraction has 2222 states and 7568 transitions. [2021-03-11 00:08:29,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:29,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 7568 transitions. [2021-03-11 00:08:29,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:29,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:29,920 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:30,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2583 [2021-03-11 00:08:30,127 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:30,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:30,128 INFO L82 PathProgramCache]: Analyzing trace with hash -364416823, now seen corresponding path program 31 times [2021-03-11 00:08:30,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:30,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516871903] [2021-03-11 00:08:30,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:30,605 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-11 00:08:30,754 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:08:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:30,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516871903] [2021-03-11 00:08:30,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354667884] [2021-03-11 00:08:30,896 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:30,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:08:30,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:31,456 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:08:31,750 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:08:32,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:32,367 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:32,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:08:32,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:32,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:32,409 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:32,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:08:32,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:32,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:32,454 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:32,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:08:32,460 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:32,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:32,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:32,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:08:32,548 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:32,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:32,594 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:32,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:08:32,600 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:32,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:32,672 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:32,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:08:32,678 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:32,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:32,750 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:32,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:08:32,759 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:32,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:32,808 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:32,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:08:32,813 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:32,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:32,859 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:32,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:08:32,864 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:32,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:32,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:32,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:08:32,952 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:32,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:32,999 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:33,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:08:33,004 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:33,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:33,074 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:33,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:08:33,080 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:33,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:33,149 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:33,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:08:33,158 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:33,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:33,232 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:33,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-03-11 00:08:33,237 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:33,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:33,286 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:33,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:08:33,291 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:33,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:33,316 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:33,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:08:33,321 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:33,856 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-11 00:08:33,857 INFO L628 ElimStorePlain]: treesize reduction 46, result has 70.1 percent of original size [2021-03-11 00:08:33,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:08:33,864 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:665, output treesize:87 [2021-03-11 00:08:34,342 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-11 00:08:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:34,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:34,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:08:34,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854383974] [2021-03-11 00:08:34,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:08:34,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:34,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:08:34,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:08:34,543 INFO L87 Difference]: Start difference. First operand 2222 states and 7568 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:35,221 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-03-11 00:08:35,640 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-03-11 00:08:36,160 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:08:36,948 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-11 00:08:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:37,057 INFO L93 Difference]: Finished difference Result 2747 states and 9184 transitions. [2021-03-11 00:08:37,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:08:37,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:08:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:37,069 INFO L225 Difference]: With dead ends: 2747 [2021-03-11 00:08:37,069 INFO L226 Difference]: Without dead ends: 2732 [2021-03-11 00:08:37,069 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3373.7ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:08:37,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-03-11 00:08:37,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2215. [2021-03-11 00:08:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2215 states, 2214 states have (on average 3.403342366757001) internal successors, (7535), 2214 states have internal predecessors, (7535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 7535 transitions. [2021-03-11 00:08:37,114 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 7535 transitions. Word has length 26 [2021-03-11 00:08:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:37,114 INFO L480 AbstractCegarLoop]: Abstraction has 2215 states and 7535 transitions. [2021-03-11 00:08:37,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 7535 transitions. [2021-03-11 00:08:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:37,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:37,118 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:37,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2652 [2021-03-11 00:08:37,319 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:37,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:37,319 INFO L82 PathProgramCache]: Analyzing trace with hash -2094376111, now seen corresponding path program 32 times [2021-03-11 00:08:37,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:37,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148282962] [2021-03-11 00:08:37,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:37,786 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-11 00:08:37,938 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-03-11 00:08:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:38,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148282962] [2021-03-11 00:08:38,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600161580] [2021-03-11 00:08:38,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:38,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:08:38,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:38,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:08:38,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:38,935 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:08:39,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:39,609 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-11 00:08:39,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:08:39,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:39,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:39,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:39,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-03-11 00:08:39,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:39,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:39,733 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-11 00:08:39,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:08:39,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:39,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:39,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:39,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 26 [2021-03-11 00:08:39,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:39,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:39,849 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-11 00:08:39,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:08:39,854 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:39,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:39,918 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:08:39,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-03-11 00:08:39,926 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:39,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:39,970 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-11 00:08:39,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:08:39,975 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:39,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:40,018 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-11 00:08:40,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:08:40,022 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:40,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:40,065 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-11 00:08:40,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:08:40,071 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:40,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:40,137 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:08:40,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-03-11 00:08:40,145 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:40,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:40,213 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:08:40,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-03-11 00:08:40,219 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:40,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:40,287 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:08:40,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-03-11 00:08:40,292 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:40,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:40,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:40,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 26 [2021-03-11 00:08:40,372 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:40,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:40,413 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-11 00:08:40,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:08:40,418 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:40,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:40,460 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-11 00:08:40,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:08:40,465 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:40,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:40,498 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-11 00:08:40,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:08:40,502 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:41,020 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-11 00:08:41,022 INFO L628 ElimStorePlain]: treesize reduction 26, result has 82.8 percent of original size [2021-03-11 00:08:41,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:08:41,027 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:697, output treesize:91 [2021-03-11 00:08:41,288 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-03-11 00:08:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:41,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:41,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-11 00:08:41,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840991126] [2021-03-11 00:08:41,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:08:41,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:41,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:08:41,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:08:41,447 INFO L87 Difference]: Start difference. First operand 2215 states and 7535 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:42,341 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-11 00:08:42,826 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:08:43,501 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-11 00:08:44,022 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-11 00:08:44,744 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-11 00:08:45,486 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:08:45,872 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-03-11 00:08:46,265 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:08:46,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:46,530 INFO L93 Difference]: Finished difference Result 2600 states and 8694 transitions. [2021-03-11 00:08:46,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:08:46,535 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-03-11 00:08:46,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:46,541 INFO L225 Difference]: With dead ends: 2600 [2021-03-11 00:08:46,541 INFO L226 Difference]: Without dead ends: 2571 [2021-03-11 00:08:46,541 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 4702.1ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:08:46,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-03-11 00:08:46,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2195. [2021-03-11 00:08:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 3.397447584320875) internal successors, (7454), 2194 states have internal predecessors, (7454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 7454 transitions. [2021-03-11 00:08:46,585 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 7454 transitions. Word has length 26 [2021-03-11 00:08:46,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:46,585 INFO L480 AbstractCegarLoop]: Abstraction has 2195 states and 7454 transitions. [2021-03-11 00:08:46,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:46,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 7454 transitions. [2021-03-11 00:08:46,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:46,590 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:46,590 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:46,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2699 [2021-03-11 00:08:46,803 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:46,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:46,803 INFO L82 PathProgramCache]: Analyzing trace with hash -583168205, now seen corresponding path program 33 times [2021-03-11 00:08:46,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:46,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084678093] [2021-03-11 00:08:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:47,297 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-11 00:08:47,447 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-03-11 00:08:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:47,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084678093] [2021-03-11 00:08:47,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97576287] [2021-03-11 00:08:47,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:47,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:08:47,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:47,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:08:47,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:48,251 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:08:48,426 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:08:49,104 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-11 00:08:49,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:49,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:49,357 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 21 treesize of output 13 [2021-03-11 00:08:49,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:49,811 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-03-11 00:08:49,812 INFO L628 ElimStorePlain]: treesize reduction 121, result has 44.0 percent of original size [2021-03-11 00:08:49,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:08:49,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:49,978 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:08:49,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:49,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:49,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:49,993 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 23 treesize of output 13 [2021-03-11 00:08:49,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:50,129 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:08:50,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:50,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:50,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:50,146 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 21 treesize of output 13 [2021-03-11 00:08:50,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:50,278 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:08:50,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:50,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:08:50,288 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:248, output treesize:29 [2021-03-11 00:08:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:50,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:50,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:08:50,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080175108] [2021-03-11 00:08:50,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:08:50,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:50,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:08:50,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:08:50,505 INFO L87 Difference]: Start difference. First operand 2195 states and 7454 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:51,591 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-03-11 00:08:52,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:52,349 INFO L93 Difference]: Finished difference Result 2371 states and 7948 transitions. [2021-03-11 00:08:52,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:08:52,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:08:52,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:52,359 INFO L225 Difference]: With dead ends: 2371 [2021-03-11 00:08:52,359 INFO L226 Difference]: Without dead ends: 2356 [2021-03-11 00:08:52,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2470.6ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:08:52,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-03-11 00:08:52,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2175. [2021-03-11 00:08:52,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 3.405703771849126) internal successors, (7404), 2174 states have internal predecessors, (7404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 7404 transitions. [2021-03-11 00:08:52,407 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 7404 transitions. Word has length 26 [2021-03-11 00:08:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:52,408 INFO L480 AbstractCegarLoop]: Abstraction has 2175 states and 7404 transitions. [2021-03-11 00:08:52,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 7404 transitions. [2021-03-11 00:08:52,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:52,412 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:52,412 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:52,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2748 [2021-03-11 00:08:52,613 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:52,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:52,613 INFO L82 PathProgramCache]: Analyzing trace with hash 987657395, now seen corresponding path program 34 times [2021-03-11 00:08:52,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:52,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829926268] [2021-03-11 00:08:52,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:53,145 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 28 [2021-03-11 00:08:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:53,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829926268] [2021-03-11 00:08:53,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148426521] [2021-03-11 00:08:53,333 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:53,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:08:53,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:53,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:08:53,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:53,787 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:08:54,037 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_251, v_prenex_253], 3=[v_prenex_249]} [2021-03-11 00:08:54,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:54,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:54,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:08:54,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:54,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:54,115 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:54,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:08:54,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:54,546 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-11 00:08:54,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:54,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:54,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:54,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:08:54,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:54,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:54,629 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:54,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:08:54,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:55,034 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-11 00:08:55,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:55,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:55,078 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:55,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:08:55,082 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:55,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:55,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:55,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:08:55,124 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:55,465 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-11 00:08:55,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:55,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:55,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:55,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:55,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-03-11 00:08:55,521 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:55,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:55,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:55,556 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:08:55,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-03-11 00:08:55,562 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:55,852 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-11 00:08:55,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:55,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:08:55,862 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:323, output treesize:151 [2021-03-11 00:08:56,237 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-11 00:08:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:56,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:56,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:08:56,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333263101] [2021-03-11 00:08:56,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:08:56,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:56,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:08:56,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:08:56,375 INFO L87 Difference]: Start difference. First operand 2175 states and 7404 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:56,708 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-11 00:08:57,573 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:08:57,864 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:08:58,123 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2021-03-11 00:08:58,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:58,226 INFO L93 Difference]: Finished difference Result 2790 states and 9311 transitions. [2021-03-11 00:08:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:08:58,228 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:08:58,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:58,233 INFO L225 Difference]: With dead ends: 2790 [2021-03-11 00:08:58,233 INFO L226 Difference]: Without dead ends: 2765 [2021-03-11 00:08:58,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2519.2ms TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:08:58,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2021-03-11 00:08:58,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2159. [2021-03-11 00:08:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2158 states have (on average 3.3985171455050973) internal successors, (7334), 2158 states have internal predecessors, (7334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 7334 transitions. [2021-03-11 00:08:58,277 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 7334 transitions. Word has length 26 [2021-03-11 00:08:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:58,277 INFO L480 AbstractCegarLoop]: Abstraction has 2159 states and 7334 transitions. [2021-03-11 00:08:58,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:58,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 7334 transitions. [2021-03-11 00:08:58,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:58,280 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:58,280 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:58,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2762 [2021-03-11 00:08:58,480 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:58,481 INFO L82 PathProgramCache]: Analyzing trace with hash -129711505, now seen corresponding path program 35 times [2021-03-11 00:08:58,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:58,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682533444] [2021-03-11 00:08:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:58,774 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-11 00:08:58,973 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-11 00:08:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:59,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682533444] [2021-03-11 00:08:59,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466080108] [2021-03-11 00:08:59,145 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:59,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:08:59,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:59,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:08:59,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:59,710 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:09:00,160 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-03-11 00:09:00,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:00,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:00,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:09:00,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:00,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:00,642 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:00,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:09:00,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,700 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2021-03-11 00:09:01,701 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.6 percent of original size [2021-03-11 00:09:01,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:01,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:09:01,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:01,788 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:01,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:09:01,792 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,248 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-11 00:09:02,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:02,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:02,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:09:02,300 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:02,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:09:02,343 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:03,174 WARN L205 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-03-11 00:09:03,175 INFO L628 ElimStorePlain]: treesize reduction 4, result has 98.6 percent of original size [2021-03-11 00:09:03,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:03,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:03,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:09:03,214 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:03,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:03,237 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:03,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:09:03,241 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:03,621 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-11 00:09:03,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:03,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:03,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:03,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:09:03,672 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:03,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:03,709 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:03,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:09:03,715 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:04,128 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-11 00:09:04,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:04,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-11 00:09:04,141 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:411, output treesize:170 [2021-03-11 00:09:04,433 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-03-11 00:09:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:04,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:04,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:09:04,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755248642] [2021-03-11 00:09:04,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:09:04,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:04,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:09:04,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:09:04,579 INFO L87 Difference]: Start difference. First operand 2159 states and 7334 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:05,006 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-03-11 00:09:05,483 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-03-11 00:09:05,761 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-11 00:09:06,191 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:09:06,552 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-11 00:09:06,869 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:09:06,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:06,993 INFO L93 Difference]: Finished difference Result 2812 states and 9378 transitions. [2021-03-11 00:09:06,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:09:06,995 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:06,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:07,000 INFO L225 Difference]: With dead ends: 2812 [2021-03-11 00:09:07,000 INFO L226 Difference]: Without dead ends: 2787 [2021-03-11 00:09:07,000 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 3429.2ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:09:07,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-03-11 00:09:07,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2155. [2021-03-11 00:09:07,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 3.3983286908077996) internal successors, (7320), 2154 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 7320 transitions. [2021-03-11 00:09:07,027 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 7320 transitions. Word has length 26 [2021-03-11 00:09:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:07,027 INFO L480 AbstractCegarLoop]: Abstraction has 2155 states and 7320 transitions. [2021-03-11 00:09:07,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:07,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 7320 transitions. [2021-03-11 00:09:07,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:07,030 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:07,030 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:07,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2792,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:07,230 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:07,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:07,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1072305685, now seen corresponding path program 36 times [2021-03-11 00:09:07,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:07,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106652605] [2021-03-11 00:09:07,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:07,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106652605] [2021-03-11 00:09:07,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660079778] [2021-03-11 00:09:07,671 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:07,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:09:07,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:07,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:09:07,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:08,318 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:09:08,846 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:09:09,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,589 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:09,589 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:09:09,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:09,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:09,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:09,642 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:09:09,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:10,023 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-11 00:09:10,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:10,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:10,108 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:10,109 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:09:10,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:10,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:10,201 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:10,201 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:09:10,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:10,598 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-11 00:09:10,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:10,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:10,674 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:10,675 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:09:10,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:10,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:10,730 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:10,730 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:09:10,733 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:11,087 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-11 00:09:11,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:11,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:11,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:11,151 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:09:11,177 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:11,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:11,243 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:11,243 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:09:11,249 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:11,581 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:09:11,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:11,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:09:11,610 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:329, output treesize:217 [2021-03-11 00:09:12,003 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-11 00:09:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:12,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:12,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:09:12,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638709744] [2021-03-11 00:09:12,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:09:12,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:12,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:09:12,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:09:12,112 INFO L87 Difference]: Start difference. First operand 2155 states and 7320 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:12,702 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-11 00:09:13,108 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-11 00:09:13,319 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-11 00:09:13,819 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2021-03-11 00:09:14,151 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-11 00:09:14,529 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:09:15,027 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-03-11 00:09:15,616 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-03-11 00:09:16,245 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-03-11 00:09:16,905 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-03-11 00:09:17,173 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:09:17,584 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:09:17,896 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 19 [2021-03-11 00:09:18,321 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2021-03-11 00:09:18,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:18,394 INFO L93 Difference]: Finished difference Result 2851 states and 9400 transitions. [2021-03-11 00:09:18,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:09:18,397 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-03-11 00:09:18,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:18,402 INFO L225 Difference]: With dead ends: 2851 [2021-03-11 00:09:18,402 INFO L226 Difference]: Without dead ends: 2821 [2021-03-11 00:09:18,402 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 6615.8ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:09:18,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2021-03-11 00:09:18,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 2173. [2021-03-11 00:09:18,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 3.399171270718232) internal successors, (7383), 2172 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 7383 transitions. [2021-03-11 00:09:18,429 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 7383 transitions. Word has length 26 [2021-03-11 00:09:18,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:18,430 INFO L480 AbstractCegarLoop]: Abstraction has 2173 states and 7383 transitions. [2021-03-11 00:09:18,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:18,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 7383 transitions. [2021-03-11 00:09:18,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:18,432 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:18,432 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:18,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2829,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:18,633 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:18,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:18,633 INFO L82 PathProgramCache]: Analyzing trace with hash 987336491, now seen corresponding path program 37 times [2021-03-11 00:09:18,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:18,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13584182] [2021-03-11 00:09:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:18,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13584182] [2021-03-11 00:09:18,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766156850] [2021-03-11 00:09:18,992 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:19,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:09:19,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:19,499 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:09:19,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:19,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:19,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:09:19,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:19,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:19,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:19,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:09:19,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:19,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,007 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:20,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:09:20,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,031 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:20,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:20,033 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,055 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:20,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:09:20,057 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,089 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:20,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:09:20,092 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,118 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:20,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:09:20,121 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,160 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:20,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:09:20,165 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,193 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:20,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:20,197 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,223 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:20,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:20,226 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,263 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:20,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:09:20,268 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,297 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:20,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:09:20,300 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,328 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:20,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:20,331 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:20,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:09:20,375 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,407 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:20,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:09:20,410 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,427 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:20,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:20,430 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,728 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-11 00:09:20,729 INFO L628 ElimStorePlain]: treesize reduction 44, result has 66.9 percent of original size [2021-03-11 00:09:20,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:09:20,735 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:71 [2021-03-11 00:09:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:21,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:21,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:09:21,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842355277] [2021-03-11 00:09:21,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:09:21,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:21,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:09:21,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:09:21,041 INFO L87 Difference]: Start difference. First operand 2173 states and 7383 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:22,215 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:09:22,511 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:09:22,745 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:09:23,165 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-11 00:09:23,361 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-03-11 00:09:23,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:23,512 INFO L93 Difference]: Finished difference Result 2994 states and 9969 transitions. [2021-03-11 00:09:23,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:09:23,514 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:23,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:23,519 INFO L225 Difference]: With dead ends: 2994 [2021-03-11 00:09:23,519 INFO L226 Difference]: Without dead ends: 2979 [2021-03-11 00:09:23,519 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 2605.5ms TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:09:23,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2021-03-11 00:09:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 2173. [2021-03-11 00:09:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 3.399171270718232) internal successors, (7383), 2172 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 7383 transitions. [2021-03-11 00:09:23,552 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 7383 transitions. Word has length 26 [2021-03-11 00:09:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:23,552 INFO L480 AbstractCegarLoop]: Abstraction has 2173 states and 7383 transitions. [2021-03-11 00:09:23,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 7383 transitions. [2021-03-11 00:09:23,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:23,555 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:23,555 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:23,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2891,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:23,755 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:23,755 INFO L82 PathProgramCache]: Analyzing trace with hash -941341329, now seen corresponding path program 38 times [2021-03-11 00:09:23,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:23,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138609325] [2021-03-11 00:09:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:24,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138609325] [2021-03-11 00:09:24,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243447663] [2021-03-11 00:09:24,121 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:24,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:09:24,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:24,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:09:24,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:24,762 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:09:25,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:25,423 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:25,424 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:09:25,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:25,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:25,497 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:25,497 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:09:25,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:25,909 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-11 00:09:25,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:25,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:25,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:25,974 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:09:25,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:26,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:26,064 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:26,065 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:09:26,068 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:26,445 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-11 00:09:26,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:26,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:26,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:26,508 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:09:26,526 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:26,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:26,589 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:26,589 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:09:26,595 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:26,943 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-11 00:09:26,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:26,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:27,000 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:27,000 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:09:27,012 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:27,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:27,080 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:27,080 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:09:27,085 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:27,454 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-11 00:09:27,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:27,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:09:27,490 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:345, output treesize:220 [2021-03-11 00:09:27,870 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-11 00:09:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:28,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:28,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:09:28,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917382806] [2021-03-11 00:09:28,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:09:28,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:28,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:09:28,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:09:28,017 INFO L87 Difference]: Start difference. First operand 2173 states and 7383 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:28,724 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:09:29,502 WARN L205 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-03-11 00:09:29,905 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:09:30,153 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:09:30,584 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-03-11 00:09:30,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:30,649 INFO L93 Difference]: Finished difference Result 2818 states and 9434 transitions. [2021-03-11 00:09:30,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:09:30,651 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:30,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:30,656 INFO L225 Difference]: With dead ends: 2818 [2021-03-11 00:09:30,656 INFO L226 Difference]: Without dead ends: 2803 [2021-03-11 00:09:30,657 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3224.5ms TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:09:30,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2021-03-11 00:09:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 2176. [2021-03-11 00:09:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.4013793103448275) internal successors, (7398), 2175 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7398 transitions. [2021-03-11 00:09:30,685 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7398 transitions. Word has length 26 [2021-03-11 00:09:30,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:30,685 INFO L480 AbstractCegarLoop]: Abstraction has 2176 states and 7398 transitions. [2021-03-11 00:09:30,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:30,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7398 transitions. [2021-03-11 00:09:30,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:30,688 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:30,688 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:30,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2938,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:30,889 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:30,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:30,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1403214703, now seen corresponding path program 39 times [2021-03-11 00:09:30,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:30,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907988549] [2021-03-11 00:09:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:31,206 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-11 00:09:31,351 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:09:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:31,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907988549] [2021-03-11 00:09:31,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279552741] [2021-03-11 00:09:31,467 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:31,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:09:31,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:31,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:09:31,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:32,096 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-11 00:09:32,358 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:09:32,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:33,016 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:33,016 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:09:33,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:33,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:33,097 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:33,098 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:09:33,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:33,594 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:09:33,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:33,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:33,683 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:33,683 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:09:33,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:33,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:33,773 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:33,774 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:09:33,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,261 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-11 00:09:34,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:34,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,337 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:34,338 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:09:34,342 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:34,401 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:09:34,416 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,848 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-11 00:09:34,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:34,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,918 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:34,918 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:09:34,924 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:34,967 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:09:34,985 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:35,367 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:09:35,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:35,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:09:35,401 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:341, output treesize:217 [2021-03-11 00:09:35,868 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-11 00:09:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:35,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:35,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:09:35,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234917226] [2021-03-11 00:09:35,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:09:35,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:35,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:09:35,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:09:35,979 INFO L87 Difference]: Start difference. First operand 2176 states and 7398 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:36,647 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2021-03-11 00:09:36,974 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:09:37,264 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:09:37,708 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:09:38,197 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:09:38,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:38,326 INFO L93 Difference]: Finished difference Result 2830 states and 9473 transitions. [2021-03-11 00:09:38,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:09:38,329 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:38,335 INFO L225 Difference]: With dead ends: 2830 [2021-03-11 00:09:38,335 INFO L226 Difference]: Without dead ends: 2815 [2021-03-11 00:09:38,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 3050.7ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:09:38,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2021-03-11 00:09:38,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2197. [2021-03-11 00:09:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2197 states, 2196 states have (on average 3.398907103825137) internal successors, (7464), 2196 states have internal predecessors, (7464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2197 states to 2197 states and 7464 transitions. [2021-03-11 00:09:38,363 INFO L78 Accepts]: Start accepts. Automaton has 2197 states and 7464 transitions. Word has length 26 [2021-03-11 00:09:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:38,363 INFO L480 AbstractCegarLoop]: Abstraction has 2197 states and 7464 transitions. [2021-03-11 00:09:38,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:38,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2197 states and 7464 transitions. [2021-03-11 00:09:38,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:38,366 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:38,366 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:38,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2999 [2021-03-11 00:09:38,567 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:38,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:38,567 INFO L82 PathProgramCache]: Analyzing trace with hash -2092411309, now seen corresponding path program 40 times [2021-03-11 00:09:38,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:38,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922512410] [2021-03-11 00:09:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:38,922 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-11 00:09:39,133 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-11 00:09:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:39,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922512410] [2021-03-11 00:09:39,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614040750] [2021-03-11 00:09:39,351 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:39,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:09:39,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:39,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:09:39,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:39,912 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:09:40,728 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-11 00:09:41,724 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 70 [2021-03-11 00:09:42,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,149 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 30 treesize of output 16 [2021-03-11 00:09:42,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,169 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 30 treesize of output 16 [2021-03-11 00:09:42,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,592 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-03-11 00:09:42,593 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.2 percent of original size [2021-03-11 00:09:42,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:09:42,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,753 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:09:42,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:42,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:42,769 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 23 treesize of output 13 [2021-03-11 00:09:42,773 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:42,899 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:09:42,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:42,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:42,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:09:42,914 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,036 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:09:43,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:43,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:09:43,045 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:229, output treesize:32 [2021-03-11 00:09:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:43,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:43,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:09:43,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614781977] [2021-03-11 00:09:43,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:09:43,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:43,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:09:43,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:09:43,212 INFO L87 Difference]: Start difference. First operand 2197 states and 7464 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:43,855 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-11 00:09:44,815 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:09:45,542 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-03-11 00:09:46,753 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 140 DAG size of output: 100 [2021-03-11 00:09:47,091 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-11 00:09:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:47,461 INFO L93 Difference]: Finished difference Result 2967 states and 9803 transitions. [2021-03-11 00:09:47,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:09:47,463 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:47,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:47,467 INFO L225 Difference]: With dead ends: 2967 [2021-03-11 00:09:47,467 INFO L226 Difference]: Without dead ends: 2910 [2021-03-11 00:09:47,468 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 5429.8ms TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:09:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-03-11 00:09:47,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2256. [2021-03-11 00:09:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.3986696230598668) internal successors, (7664), 2255 states have internal predecessors, (7664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 7664 transitions. [2021-03-11 00:09:47,496 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 7664 transitions. Word has length 26 [2021-03-11 00:09:47,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:47,496 INFO L480 AbstractCegarLoop]: Abstraction has 2256 states and 7664 transitions. [2021-03-11 00:09:47,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:47,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 7664 transitions. [2021-03-11 00:09:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:47,499 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:47,499 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:47,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3060,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:47,699 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:47,700 INFO L82 PathProgramCache]: Analyzing trace with hash 585023207, now seen corresponding path program 41 times [2021-03-11 00:09:47,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:47,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918200520] [2021-03-11 00:09:47,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:48,046 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-11 00:09:48,268 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-11 00:09:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:48,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918200520] [2021-03-11 00:09:48,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463816251] [2021-03-11 00:09:48,384 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:48,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:09:48,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:48,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:09:48,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:49,054 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:09:49,714 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-11 00:09:49,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:50,016 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:50,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:09:50,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:50,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:50,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:50,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:09:50,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:51,167 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 128 DAG size of output: 124 [2021-03-11 00:09:51,168 INFO L628 ElimStorePlain]: treesize reduction 69, result has 84.4 percent of original size [2021-03-11 00:09:51,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:51,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:51,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:09:51,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:51,728 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-11 00:09:51,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:51,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:51,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:51,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:09:51,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:52,229 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-11 00:09:52,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:52,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:52,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:52,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:09:52,287 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:52,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:52,311 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:52,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:52,316 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:53,126 WARN L205 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2021-03-11 00:09:53,127 INFO L628 ElimStorePlain]: treesize reduction 18, result has 94.0 percent of original size [2021-03-11 00:09:53,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:53,163 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:53,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:09:53,169 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:53,524 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-11 00:09:53,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:53,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:53,553 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:53,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:09:53,557 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:53,961 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-11 00:09:53,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:53,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:54,011 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:54,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:09:54,015 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:54,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:54,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:54,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:09:54,051 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:54,682 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-03-11 00:09:54,683 INFO L628 ElimStorePlain]: treesize reduction 22, result has 89.8 percent of original size [2021-03-11 00:09:54,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:54,717 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:54,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:09:54,722 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,048 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:09:55,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:55,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:09:55,065 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:503, output treesize:150 [2021-03-11 00:09:55,650 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:09:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:55,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:55,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:09:55,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801693777] [2021-03-11 00:09:55,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:09:55,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:55,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:09:55,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:09:55,800 INFO L87 Difference]: Start difference. First operand 2256 states and 7664 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:56,397 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-11 00:09:57,263 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:09:57,933 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:09:58,566 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-11 00:09:59,085 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-11 00:09:59,713 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-03-11 00:10:00,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:00,054 INFO L93 Difference]: Finished difference Result 3226 states and 10642 transitions. [2021-03-11 00:10:00,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:10:00,057 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-03-11 00:10:00,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:00,063 INFO L225 Difference]: With dead ends: 3226 [2021-03-11 00:10:00,063 INFO L226 Difference]: Without dead ends: 3190 [2021-03-11 00:10:00,064 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 5258.9ms TimeCoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:10:00,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-03-11 00:10:00,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2236. [2021-03-11 00:10:00,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2236 states, 2235 states have (on average 3.3982102908277403) internal successors, (7595), 2235 states have internal predecessors, (7595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 7595 transitions. [2021-03-11 00:10:00,094 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 7595 transitions. Word has length 26 [2021-03-11 00:10:00,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:00,094 INFO L480 AbstractCegarLoop]: Abstraction has 2236 states and 7595 transitions. [2021-03-11 00:10:00,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:00,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 7595 transitions. [2021-03-11 00:10:00,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:00,097 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:00,097 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:10:00,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3078 [2021-03-11 00:10:00,298 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:00,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:00,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1104919697, now seen corresponding path program 42 times [2021-03-11 00:10:00,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:00,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958212965] [2021-03-11 00:10:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:00,868 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-03-11 00:10:01,096 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-11 00:10:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:01,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958212965] [2021-03-11 00:10:01,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723952565] [2021-03-11 00:10:01,283 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:01,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:10:01,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:01,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:10:01,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:01,849 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:10:02,083 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:10:02,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:02,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-03-11 00:10:02,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:02,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,302 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:02,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-03-11 00:10:02,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:02,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,356 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:02,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-03-11 00:10:02,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:02,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,408 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:02,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 1 [2021-03-11 00:10:02,412 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:02,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:02,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-03-11 00:10:02,483 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:02,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,520 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:02,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-03-11 00:10:02,524 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:02,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:02,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-03-11 00:10:02,604 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:02,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,664 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:02,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2021-03-11 00:10:02,668 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:02,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,706 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:02,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-03-11 00:10:02,710 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:02,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,751 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:02,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-03-11 00:10:02,757 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:02,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,808 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:02,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 1 [2021-03-11 00:10:02,812 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:02,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,877 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:02,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 26 [2021-03-11 00:10:02,883 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:02,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,923 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:02,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-03-11 00:10:02,928 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:02,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:02,989 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:02,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-03-11 00:10:02,996 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:03,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:03,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:03,034 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:03,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 23 [2021-03-11 00:10:03,039 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:03,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:03,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:03,067 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:03,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-03-11 00:10:03,072 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:03,494 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-11 00:10:03,495 INFO L628 ElimStorePlain]: treesize reduction 24, result has 83.9 percent of original size [2021-03-11 00:10:03,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:10:03,498 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:821, output treesize:125 [2021-03-11 00:10:03,768 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:10:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:03,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:03,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:10:03,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610761032] [2021-03-11 00:10:03,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:10:03,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:03,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:10:03,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:10:03,943 INFO L87 Difference]: Start difference. First operand 2236 states and 7595 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:04,618 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-11 00:10:05,091 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-03-11 00:10:05,656 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2021-03-11 00:10:06,131 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-03-11 00:10:07,104 WARN L205 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2021-03-11 00:10:07,493 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:10:07,959 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 19 [2021-03-11 00:10:08,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:08,464 INFO L93 Difference]: Finished difference Result 2948 states and 9791 transitions. [2021-03-11 00:10:08,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:10:08,467 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-03-11 00:10:08,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:08,472 INFO L225 Difference]: With dead ends: 2948 [2021-03-11 00:10:08,472 INFO L226 Difference]: Without dead ends: 2902 [2021-03-11 00:10:08,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4858.0ms TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:10:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2902 states. [2021-03-11 00:10:08,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2902 to 2236. [2021-03-11 00:10:08,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2236 states, 2235 states have (on average 3.3982102908277403) internal successors, (7595), 2235 states have internal predecessors, (7595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:08,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 7595 transitions. [2021-03-11 00:10:08,506 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 7595 transitions. Word has length 26 [2021-03-11 00:10:08,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:08,506 INFO L480 AbstractCegarLoop]: Abstraction has 2236 states and 7595 transitions. [2021-03-11 00:10:08,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:08,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 7595 transitions. [2021-03-11 00:10:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:08,510 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:08,510 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:10:08,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3105 [2021-03-11 00:10:08,710 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:08,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:08,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1379621035, now seen corresponding path program 43 times [2021-03-11 00:10:08,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:08,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741741030] [2021-03-11 00:10:08,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:09,098 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-03-11 00:10:09,474 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-03-11 00:10:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:09,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741741030] [2021-03-11 00:10:09,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746639872] [2021-03-11 00:10:09,656 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:09,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:10:09,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:10,384 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:10:10,999 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-03-11 00:10:11,941 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_330, v_prenex_331, v_prenex_333], 3=[v_prenex_329]} [2021-03-11 00:10:11,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:11,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:11,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:10:12,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:12,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:12,048 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:12,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:10:12,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:13,317 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2021-03-11 00:10:13,318 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.7 percent of original size [2021-03-11 00:10:13,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:13,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:13,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:10:13,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:13,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:13,430 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:13,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:10:13,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:13,995 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-11 00:10:13,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:14,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:14,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:14,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:10:14,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:14,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:14,106 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:14,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:10:14,111 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:14,680 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-11 00:10:14,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:14,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:14,725 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:14,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:10:14,730 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:14,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:14,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:14,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:10:14,763 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:15,307 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:10:15,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:15,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:15,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:15,370 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:10:15,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-03-11 00:10:15,377 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:15,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:15,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:15,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:15,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-03-11 00:10:15,428 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:15,942 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-11 00:10:15,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:15,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-11 00:10:15,957 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:421, output treesize:180 [2021-03-11 00:10:16,380 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-11 00:10:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:16,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:16,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:10:16,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989683587] [2021-03-11 00:10:16,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:10:16,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:16,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:10:16,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:10:16,597 INFO L87 Difference]: Start difference. First operand 2236 states and 7595 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:17,640 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:10:18,261 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:10:18,696 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:10:19,052 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2021-03-11 00:10:19,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:19,244 INFO L93 Difference]: Finished difference Result 2821 states and 9462 transitions. [2021-03-11 00:10:19,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:10:19,248 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:19,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:19,253 INFO L225 Difference]: With dead ends: 2821 [2021-03-11 00:10:19,253 INFO L226 Difference]: Without dead ends: 2806 [2021-03-11 00:10:19,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 3969.7ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:10:19,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2021-03-11 00:10:19,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2236. [2021-03-11 00:10:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2236 states, 2235 states have (on average 3.3982102908277403) internal successors, (7595), 2235 states have internal predecessors, (7595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:19,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 7595 transitions. [2021-03-11 00:10:19,283 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 7595 transitions. Word has length 26 [2021-03-11 00:10:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:19,283 INFO L480 AbstractCegarLoop]: Abstraction has 2236 states and 7595 transitions. [2021-03-11 00:10:19,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:19,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 7595 transitions. [2021-03-11 00:10:19,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:19,286 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:19,286 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] [2021-03-11 00:10:19,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3124,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:19,487 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:19,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1044929515, now seen corresponding path program 55 times [2021-03-11 00:10:19,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:19,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123827435] [2021-03-11 00:10:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:19,693 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-11 00:10:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:20,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123827435] [2021-03-11 00:10:20,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658079299] [2021-03-11 00:10:20,213 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:20,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:10:20,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:20,688 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:10:20,966 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:10:22,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:10:22,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:10:22,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:22,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:10:22,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:10:22,178 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:10:22,212 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:10:22,243 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:22,269 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:10:22,294 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:10:22,318 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:10:22,341 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:10:22,382 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:10:22,407 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:10:22,434 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:10:22,455 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,581 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-03-11 00:10:22,582 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-03-11 00:10:22,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:10:22,587 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-03-11 00:10:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:22,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:22,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:10:22,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422758548] [2021-03-11 00:10:22,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:10:22,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:22,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:10:22,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:10:22,723 INFO L87 Difference]: Start difference. First operand 2236 states and 7595 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:22,927 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2021-03-11 00:10:24,351 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:10:24,986 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:10:25,422 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-03-11 00:10:25,712 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-11 00:10:25,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:25,960 INFO L93 Difference]: Finished difference Result 2832 states and 9145 transitions. [2021-03-11 00:10:25,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:10:25,964 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:25,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:25,969 INFO L225 Difference]: With dead ends: 2832 [2021-03-11 00:10:25,969 INFO L226 Difference]: Without dead ends: 2795 [2021-03-11 00:10:25,969 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 3207.1ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:10:25,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-03-11 00:10:25,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2244. [2021-03-11 00:10:25,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2243 states have (on average 3.3976816763263487) internal successors, (7621), 2243 states have internal predecessors, (7621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:26,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 7621 transitions. [2021-03-11 00:10:26,004 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 7621 transitions. Word has length 26 [2021-03-11 00:10:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:26,004 INFO L480 AbstractCegarLoop]: Abstraction has 2244 states and 7621 transitions. [2021-03-11 00:10:26,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:26,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 7621 transitions. [2021-03-11 00:10:26,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:26,007 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:26,007 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] [2021-03-11 00:10:26,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3162,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:26,208 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:26,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:26,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2112804079, now seen corresponding path program 56 times [2021-03-11 00:10:26,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:26,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327332595] [2021-03-11 00:10:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:26,464 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-11 00:10:26,853 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-03-11 00:10:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:26,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327332595] [2021-03-11 00:10:26,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163459162] [2021-03-11 00:10:26,989 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:27,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:10:27,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:27,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:10:27,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:27,478 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:10:27,999 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-11 00:10:28,224 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_338, v_prenex_336], 5=[A, v_prenex_334]} [2021-03-11 00:10:28,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:28,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:28,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:28,247 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 28 treesize of output 13 [2021-03-11 00:10:28,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:28,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:28,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:28,269 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 23 treesize of output 13 [2021-03-11 00:10:28,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:28,627 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-11 00:10:28,628 INFO L628 ElimStorePlain]: treesize reduction 141, result has 43.6 percent of original size [2021-03-11 00:10:28,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:28,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:10:28,641 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:28,794 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:10:28,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:28,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:28,806 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 27 treesize of output 13 [2021-03-11 00:10:28,811 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:28,957 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:10:28,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:28,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:28,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:28,973 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 27 treesize of output 13 [2021-03-11 00:10:28,978 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:29,102 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:10:29,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:29,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:10:29,113 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:303, output treesize:29 [2021-03-11 00:10:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:29,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:29,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:10:29,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951918966] [2021-03-11 00:10:29,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:10:29,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:29,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:10:29,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:10:29,320 INFO L87 Difference]: Start difference. First operand 2244 states and 7621 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:29,828 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2021-03-11 00:10:30,365 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2021-03-11 00:10:31,132 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:10:31,401 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-11 00:10:31,997 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-11 00:10:32,385 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:10:32,880 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:10:33,269 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:10:33,580 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:10:34,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:34,087 INFO L93 Difference]: Finished difference Result 2782 states and 9238 transitions. [2021-03-11 00:10:34,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:10:34,091 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:34,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:34,096 INFO L225 Difference]: With dead ends: 2782 [2021-03-11 00:10:34,096 INFO L226 Difference]: Without dead ends: 2736 [2021-03-11 00:10:34,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 4606.3ms TimeCoverageRelationStatistics Valid=296, Invalid=1036, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:10:34,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-03-11 00:10:34,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2252. [2021-03-11 00:10:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 3.3936028431808087) internal successors, (7639), 2251 states have internal predecessors, (7639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:34,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 7639 transitions. [2021-03-11 00:10:34,125 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 7639 transitions. Word has length 26 [2021-03-11 00:10:34,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:34,125 INFO L480 AbstractCegarLoop]: Abstraction has 2252 states and 7639 transitions. [2021-03-11 00:10:34,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:34,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 7639 transitions. [2021-03-11 00:10:34,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:34,128 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:34,128 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] [2021-03-11 00:10:34,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3252 [2021-03-11 00:10:34,330 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:34,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:34,331 INFO L82 PathProgramCache]: Analyzing trace with hash 455537647, now seen corresponding path program 57 times [2021-03-11 00:10:34,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:34,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065267761] [2021-03-11 00:10:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:34,606 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-03-11 00:10:34,881 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-11 00:10:35,205 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:10:35,340 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2021-03-11 00:10:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:35,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065267761] [2021-03-11 00:10:35,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832872647] [2021-03-11 00:10:35,421 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:35,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:10:35,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:35,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:10:35,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:36,182 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:10:36,884 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:10:37,925 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_353, v_prenex_354, v_prenex_356, v_prenex_347, v_prenex_348], 6=[v_prenex_350, v_prenex_351]} [2021-03-11 00:10:37,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:37,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:38,083 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:10:38,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-03-11 00:10:38,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:38,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:38,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:38,155 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:10:38,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:10:38,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,409 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 151 [2021-03-11 00:10:39,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:39,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,563 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:10:39,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-03-11 00:10:39,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:39,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:39,668 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-03-11 00:10:39,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-03-11 00:10:39,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:40,966 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 143 [2021-03-11 00:10:40,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:40,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:40,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:41,117 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:10:41,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-03-11 00:10:41,135 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:41,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:41,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:41,290 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-11 00:10:41,292 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-03-11 00:10:41,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-03-11 00:10:41,309 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:42,501 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 135 [2021-03-11 00:10:42,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:42,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:42,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:42,649 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:10:42,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-03-11 00:10:42,653 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:42,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:42,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:42,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:42,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-03-11 00:10:42,768 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:45,204 WARN L205 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 130 DAG size of output: 127 [2021-03-11 00:10:45,205 INFO L628 ElimStorePlain]: treesize reduction 28, result has 95.0 percent of original size [2021-03-11 00:10:45,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:45,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:45,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:45,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-03-11 00:10:45,365 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:45,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:45,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:45,489 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:10:45,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-03-11 00:10:45,507 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:47,644 WARN L205 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 127 DAG size of output: 116 [2021-03-11 00:10:47,645 INFO L628 ElimStorePlain]: treesize reduction 43, result has 91.6 percent of original size [2021-03-11 00:10:47,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:47,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:47,790 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:10:47,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-03-11 00:10:47,801 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:47,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:47,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:47,899 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-03-11 00:10:47,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-03-11 00:10:47,907 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:48,842 WARN L205 SmtUtils]: Spent 934.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-03-11 00:10:48,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:48,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:48,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:48,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:48,964 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-03-11 00:10:48,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-03-11 00:10:48,973 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:48,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:48,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:48,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:49,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:49,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-03-11 00:10:49,087 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:50,032 WARN L205 SmtUtils]: Spent 944.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-11 00:10:50,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:50,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:50,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:50,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:50,165 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-11 00:10:50,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-03-11 00:10:50,181 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:50,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:50,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:50,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:50,217 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-03-11 00:10:50,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-03-11 00:10:50,221 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:51,016 WARN L205 SmtUtils]: Spent 794.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-03-11 00:10:51,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:51,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-03-11 00:10:51,047 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:741, output treesize:319 [2021-03-11 00:10:51,639 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2021-03-11 00:10:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:51,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:51,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:10:51,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441166513] [2021-03-11 00:10:51,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:10:51,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:51,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:10:51,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:10:51,851 INFO L87 Difference]: Start difference. First operand 2252 states and 7639 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:52,056 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 14 [2021-03-11 00:10:52,992 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-11 00:10:53,825 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-11 00:10:54,113 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:10:54,553 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:10:54,920 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:10:55,501 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-03-11 00:10:56,358 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-11 00:10:57,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:57,015 INFO L93 Difference]: Finished difference Result 2884 states and 9647 transitions. [2021-03-11 00:10:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:10:57,019 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:57,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:57,024 INFO L225 Difference]: With dead ends: 2884 [2021-03-11 00:10:57,025 INFO L226 Difference]: Without dead ends: 2869 [2021-03-11 00:10:57,025 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 6199.8ms TimeCoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:10:57,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2869 states. [2021-03-11 00:10:57,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2869 to 2267. [2021-03-11 00:10:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2266 states have (on average 3.3989408649602826) internal successors, (7702), 2266 states have internal predecessors, (7702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 7702 transitions. [2021-03-11 00:10:57,055 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 7702 transitions. Word has length 26 [2021-03-11 00:10:57,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:57,056 INFO L480 AbstractCegarLoop]: Abstraction has 2267 states and 7702 transitions. [2021-03-11 00:10:57,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 7702 transitions. [2021-03-11 00:10:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:57,059 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:57,059 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:10:57,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3266,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:57,259 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:57,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:57,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1197737873, now seen corresponding path program 44 times [2021-03-11 00:10:57,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:57,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198028629] [2021-03-11 00:10:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:57,634 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-11 00:10:58,087 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-03-11 00:10:58,365 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-11 00:10:58,640 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-11 00:10:58,850 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-03-11 00:10:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:58,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198028629] [2021-03-11 00:10:58,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194761555] [2021-03-11 00:10:58,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:58,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:10:58,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:58,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:10:58,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:59,569 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:10:59,838 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:10:59,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:00,003 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:00,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:11:00,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:00,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:00,066 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:11:00,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:11:00,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:00,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:00,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:00,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-03-11 00:11:00,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:00,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:00,178 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:00,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:11:00,183 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:00,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:00,225 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:00,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:11:00,231 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:00,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:00,293 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:11:00,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:11:00,302 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:00,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:00,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:00,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:11:00,375 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:00,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:00,414 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:00,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:11:00,419 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:00,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:00,465 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:00,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:11:00,470 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:00,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:00,514 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:00,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:11:00,519 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:00,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:00,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:00,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:11:00,600 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:00,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:00,659 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:11:00,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:11:00,665 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:00,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:00,708 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:00,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:11:00,713 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:00,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:00,752 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:00,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:11:00,759 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:00,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:00,818 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:11:00,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-03-11 00:11:00,824 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:00,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:00,852 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:00,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:11:00,857 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:01,293 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-03-11 00:11:01,294 INFO L628 ElimStorePlain]: treesize reduction 51, result has 60.5 percent of original size [2021-03-11 00:11:01,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:11:01,298 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-03-11 00:11:01,603 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-03-11 00:11:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:01,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:01,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:11:01,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951869219] [2021-03-11 00:11:01,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:11:01,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:01,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:11:01,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:11:01,756 INFO L87 Difference]: Start difference. First operand 2267 states and 7702 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:02,069 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2021-03-11 00:11:02,249 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:11:02,721 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-03-11 00:11:02,897 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:11:03,422 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2021-03-11 00:11:03,916 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 36 [2021-03-11 00:11:04,138 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-11 00:11:04,859 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-03-11 00:11:05,591 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2021-03-11 00:11:06,401 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-11 00:11:07,154 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-11 00:11:07,763 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-03-11 00:11:09,197 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-03-11 00:11:10,246 WARN L205 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-03-11 00:11:10,666 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:11:11,332 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2021-03-11 00:11:12,115 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-11 00:11:12,653 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:11:13,298 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-03-11 00:11:13,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:13,901 INFO L93 Difference]: Finished difference Result 2970 states and 9854 transitions. [2021-03-11 00:11:13,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:11:13,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-03-11 00:11:13,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:13,911 INFO L225 Difference]: With dead ends: 2970 [2021-03-11 00:11:13,911 INFO L226 Difference]: Without dead ends: 2955 [2021-03-11 00:11:13,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 11060.8ms TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:11:13,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-03-11 00:11:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2282. [2021-03-11 00:11:13,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 3.40201665935993) internal successors, (7760), 2281 states have internal predecessors, (7760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 7760 transitions. [2021-03-11 00:11:13,945 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 7760 transitions. Word has length 26 [2021-03-11 00:11:13,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:13,945 INFO L480 AbstractCegarLoop]: Abstraction has 2282 states and 7760 transitions. [2021-03-11 00:11:13,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 7760 transitions. [2021-03-11 00:11:13,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:13,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:13,948 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] [2021-03-11 00:11:14,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3334,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:14,150 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:14,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:14,150 INFO L82 PathProgramCache]: Analyzing trace with hash 352643691, now seen corresponding path program 58 times [2021-03-11 00:11:14,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:14,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804729712] [2021-03-11 00:11:14,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:14,363 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-11 00:11:14,570 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-11 00:11:14,790 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-03-11 00:11:14,929 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-03-11 00:11:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:15,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804729712] [2021-03-11 00:11:15,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387770072] [2021-03-11 00:11:15,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:15,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:11:15,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:15,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:11:15,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:15,588 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:11:15,817 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:11:16,123 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:11:17,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:11:17,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:17,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:11:17,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:17,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:11:17,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:17,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:11:17,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:17,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:11:17,384 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:17,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:11:17,429 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:17,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:11:17,470 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:17,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:11:17,511 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:17,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:11:17,555 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:17,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:11:17,593 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:17,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:11:17,629 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:17,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:11:17,667 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:17,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:11:17,705 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:17,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:11:17,741 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:17,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:17,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:17,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:11:17,763 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:17,868 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-03-11 00:11:17,869 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-03-11 00:11:17,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:11:17,874 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-03-11 00:11:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:17,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:17,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-11 00:11:17,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952283614] [2021-03-11 00:11:17,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:11:17,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:17,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:11:17,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:11:17,980 INFO L87 Difference]: Start difference. First operand 2282 states and 7760 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:18,582 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-11 00:11:19,363 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-11 00:11:19,606 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:11:19,992 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:11:20,444 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:11:21,167 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-11 00:11:21,804 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-11 00:11:22,871 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-03-11 00:11:23,563 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-03-11 00:11:24,039 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-11 00:11:24,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:24,355 INFO L93 Difference]: Finished difference Result 3380 states and 10818 transitions. [2021-03-11 00:11:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:11:24,359 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:11:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:24,365 INFO L225 Difference]: With dead ends: 3380 [2021-03-11 00:11:24,365 INFO L226 Difference]: Without dead ends: 3343 [2021-03-11 00:11:24,366 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 5833.2ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:11:24,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2021-03-11 00:11:24,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 2346. [2021-03-11 00:11:24,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 3.4072494669509594) internal successors, (7990), 2345 states have internal predecessors, (7990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 7990 transitions. [2021-03-11 00:11:24,402 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 7990 transitions. Word has length 26 [2021-03-11 00:11:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:24,402 INFO L480 AbstractCegarLoop]: Abstraction has 2346 states and 7990 transitions. [2021-03-11 00:11:24,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 7990 transitions. [2021-03-11 00:11:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:24,406 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:24,406 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] [2021-03-11 00:11:24,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3353 [2021-03-11 00:11:24,606 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:24,607 INFO L82 PathProgramCache]: Analyzing trace with hash 578637215, now seen corresponding path program 59 times [2021-03-11 00:11:24,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:24,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585311884] [2021-03-11 00:11:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:24,935 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-11 00:11:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:25,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585311884] [2021-03-11 00:11:25,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943008891] [2021-03-11 00:11:25,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:25,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:11:25,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:25,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-11 00:11:25,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:25,820 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:11:26,554 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-11 00:11:27,201 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-11 00:11:27,973 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2021-03-11 00:11:28,698 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_372, v_prenex_368], 5=[A, v_prenex_370]} [2021-03-11 00:11:28,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:28,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:28,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:28,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:28,725 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 21 treesize of output 13 [2021-03-11 00:11:28,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:28,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:28,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:28,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:28,749 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 26 treesize of output 13 [2021-03-11 00:11:28,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:29,322 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-03-11 00:11:29,323 INFO L628 ElimStorePlain]: treesize reduction 131, result has 41.8 percent of original size [2021-03-11 00:11:29,324 INFO L518 ElimStorePlain]: Eliminatee v_prenex_368 vanished before elimination [2021-03-11 00:11:29,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:29,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:29,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:29,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:29,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:11:29,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:29,507 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:11:29,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:29,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:29,519 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 23 treesize of output 13 [2021-03-11 00:11:29,524 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:29,657 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:11:29,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:29,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:11:29,666 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:279, output treesize:22 [2021-03-11 00:11:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:29,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:29,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:11:29,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946844926] [2021-03-11 00:11:29,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:11:29,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:29,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:11:29,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:11:29,875 INFO L87 Difference]: Start difference. First operand 2346 states and 7990 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,103 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-03-11 00:11:30,991 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-11 00:11:31,496 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:11:32,183 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:11:32,473 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:11:33,091 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-11 00:11:34,056 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-11 00:11:34,879 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-11 00:11:35,090 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:11:36,310 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 64 [2021-03-11 00:11:37,078 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-11 00:11:38,267 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2021-03-11 00:11:39,042 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-11 00:11:39,939 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-03-11 00:11:41,089 WARN L205 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 56 [2021-03-11 00:11:42,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:42,019 INFO L93 Difference]: Finished difference Result 4141 states and 13315 transitions. [2021-03-11 00:11:42,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:11:42,024 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:11:42,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:42,030 INFO L225 Difference]: With dead ends: 4141 [2021-03-11 00:11:42,031 INFO L226 Difference]: Without dead ends: 4111 [2021-03-11 00:11:42,031 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 11786.1ms TimeCoverageRelationStatistics Valid=363, Invalid=1529, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:11:42,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2021-03-11 00:11:42,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 2486. [2021-03-11 00:11:42,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 3.426559356136821) internal successors, (8515), 2485 states have internal predecessors, (8515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 8515 transitions. [2021-03-11 00:11:42,074 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 8515 transitions. Word has length 26 [2021-03-11 00:11:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:42,074 INFO L480 AbstractCegarLoop]: Abstraction has 2486 states and 8515 transitions. [2021-03-11 00:11:42,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 8515 transitions. [2021-03-11 00:11:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:42,078 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:42,078 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] [2021-03-11 00:11:42,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3443,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:42,278 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:42,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:42,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1882681429, now seen corresponding path program 60 times [2021-03-11 00:11:42,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:42,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818507136] [2021-03-11 00:11:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:42,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818507136] [2021-03-11 00:11:42,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146387487] [2021-03-11 00:11:42,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:42,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:11:42,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:42,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:11:42,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:43,640 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:11:43,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:43,984 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 15 [2021-03-11 00:11:43,985 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-03-11 00:11:43,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2021-03-11 00:11:44,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,129 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-03-11 00:11:44,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 23 [2021-03-11 00:11:44,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,296 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 15 [2021-03-11 00:11:44,297 INFO L354 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2021-03-11 00:11:44,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 34 [2021-03-11 00:11:44,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,397 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-03-11 00:11:44,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 1 [2021-03-11 00:11:44,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,575 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 15 [2021-03-11 00:11:44,576 INFO L354 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2021-03-11 00:11:44,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 37 [2021-03-11 00:11:44,587 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,775 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-11 00:11:44,776 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-03-11 00:11:44,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 43 [2021-03-11 00:11:44,794 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:44,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 55 [2021-03-11 00:11:44,987 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:45,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:45,075 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-03-11 00:11:45,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:11:45,081 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:45,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:45,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:45,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-03-11 00:11:45,274 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:45,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:45,407 INFO L354 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2021-03-11 00:11:45,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 25 [2021-03-11 00:11:45,414 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:45,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:45,495 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-03-11 00:11:45,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:11:45,500 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:45,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:45,589 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-03-11 00:11:45,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:11:45,594 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:45,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:45,681 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-03-11 00:11:45,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:11:45,686 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:45,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:45,761 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-03-11 00:11:45,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:11:45,765 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:45,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:45,850 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-03-11 00:11:45,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:11:45,855 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:45,904 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-03-11 00:11:45,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:11:45,909 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:46,542 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2021-03-11 00:11:46,543 INFO L628 ElimStorePlain]: treesize reduction 122, result has 50.6 percent of original size [2021-03-11 00:11:46,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:11:46,546 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:737, output treesize:125 [2021-03-11 00:11:46,896 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:11:47,148 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-03-11 00:11:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:47,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:47,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-03-11 00:11:47,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495277486] [2021-03-11 00:11:47,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:11:47,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:47,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:11:47,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:11:47,267 INFO L87 Difference]: Start difference. First operand 2486 states and 8515 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:47,687 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-03-11 00:11:48,090 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:11:48,581 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-11 00:11:49,254 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-03-11 00:11:49,494 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-03-11 00:11:49,923 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-11 00:11:50,383 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:11:50,756 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-11 00:11:51,322 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-11 00:11:51,693 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-03-11 00:11:52,051 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-11 00:11:52,387 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-11 00:11:53,067 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2021-03-11 00:11:53,605 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-11 00:11:53,895 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-11 00:11:54,621 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-11 00:11:56,137 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-03-11 00:11:56,531 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:11:57,240 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-03-11 00:11:58,528 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-03-11 00:12:00,348 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-03-11 00:12:01,307 WARN L205 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-03-11 00:12:01,870 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:12:02,327 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:12:03,626 WARN L205 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-03-11 00:12:03,879 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-03-11 00:12:04,282 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2021-03-11 00:12:04,964 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2021-03-11 00:12:05,474 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:12:06,387 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-03-11 00:12:06,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:06,615 INFO L93 Difference]: Finished difference Result 4378 states and 14064 transitions. [2021-03-11 00:12:06,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:12:06,620 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:12:06,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:06,627 INFO L225 Difference]: With dead ends: 4378 [2021-03-11 00:12:06,627 INFO L226 Difference]: Without dead ends: 4312 [2021-03-11 00:12:06,628 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 17490.6ms TimeCoverageRelationStatistics Valid=599, Invalid=2941, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:12:06,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-03-11 00:12:06,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 2482. [2021-03-11 00:12:06,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2481 states have (on average 3.4256348246674726) internal successors, (8499), 2481 states have internal predecessors, (8499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:06,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 8499 transitions. [2021-03-11 00:12:06,681 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 8499 transitions. Word has length 26 [2021-03-11 00:12:06,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:06,681 INFO L480 AbstractCegarLoop]: Abstraction has 2482 states and 8499 transitions. [2021-03-11 00:12:06,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:06,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 8499 transitions. [2021-03-11 00:12:06,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:12:06,684 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:06,684 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:06,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3478 [2021-03-11 00:12:06,885 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:06,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:06,885 INFO L82 PathProgramCache]: Analyzing trace with hash -32178733, now seen corresponding path program 45 times [2021-03-11 00:12:06,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:06,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122737419] [2021-03-11 00:12:06,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:07,382 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2021-03-11 00:12:07,758 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-11 00:12:08,085 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-11 00:12:08,353 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-11 00:12:08,623 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-11 00:12:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:08,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122737419] [2021-03-11 00:12:08,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114618657] [2021-03-11 00:12:08,659 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:08,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:12:08,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:08,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:12:08,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:09,285 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:12:09,621 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:12:09,963 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:12:10,254 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:10,255 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-03-11 00:12:10,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:10,371 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-03-11 00:12:10,371 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 22 [2021-03-11 00:12:10,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:10,416 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:12:10,416 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:12:10,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:10,471 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:12:10,472 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:12:10,477 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:10,541 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:12:10,541 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:12:10,546 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:10,674 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:12:10,675 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:12:10,682 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:10,816 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:10,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:12:10,836 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:10,886 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:12:10,886 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:12:10,893 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:10,946 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:12:10,947 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 1 [2021-03-11 00:12:10,951 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:11,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:11,042 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:12:11,070 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:11,122 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:12:11,123 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:12:11,128 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:11,238 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-11 00:12:11,239 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 26 [2021-03-11 00:12:11,244 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:11,294 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:12:11,294 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:12:11,299 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:11,345 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:12:11,345 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:12:11,352 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:11,397 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:12:11,397 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:12:11,401 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:11,431 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:12:11,431 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:12:11,436 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:12,221 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-11 00:12:12,223 INFO L628 ElimStorePlain]: treesize reduction 30, result has 85.8 percent of original size [2021-03-11 00:12:12,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-11 00:12:12,226 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:797, output treesize:181 [2021-03-11 00:12:12,696 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:12:13,318 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-11 00:12:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:13,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:13,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-03-11 00:12:13,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845461980] [2021-03-11 00:12:13,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:12:13,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:13,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:12:13,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:12:13,502 INFO L87 Difference]: Start difference. First operand 2482 states and 8499 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:13,813 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-11 00:12:14,041 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 24 [2021-03-11 00:12:14,253 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:12:14,864 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:12:15,485 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-11 00:12:15,862 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2021-03-11 00:12:16,328 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-11 00:12:17,105 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:12:17,622 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-11 00:12:18,438 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-11 00:12:19,516 WARN L205 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-11 00:12:19,713 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:12:20,853 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-11 00:12:21,616 WARN L205 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-03-11 00:12:21,967 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:12:22,928 WARN L205 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-03-11 00:12:24,811 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-03-11 00:12:25,978 WARN L205 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-03-11 00:12:27,276 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-03-11 00:12:28,263 WARN L205 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-03-11 00:12:29,457 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-03-11 00:12:30,453 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-03-11 00:12:31,531 WARN L205 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-03-11 00:12:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:32,788 INFO L93 Difference]: Finished difference Result 3286 states and 10847 transitions. [2021-03-11 00:12:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:12:32,793 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:12:32,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:32,800 INFO L225 Difference]: With dead ends: 3286 [2021-03-11 00:12:32,800 INFO L226 Difference]: Without dead ends: 3211 [2021-03-11 00:12:32,800 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 17198.1ms TimeCoverageRelationStatistics Valid=301, Invalid=1591, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:12:32,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-03-11 00:12:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2529. [2021-03-11 00:12:32,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 3.410601265822785) internal successors, (8622), 2528 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 8622 transitions. [2021-03-11 00:12:32,837 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 8622 transitions. Word has length 26 [2021-03-11 00:12:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:32,837 INFO L480 AbstractCegarLoop]: Abstraction has 2529 states and 8622 transitions. [2021-03-11 00:12:32,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:32,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 8622 transitions. [2021-03-11 00:12:32,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:12:32,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:32,841 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:33,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3520,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:33,041 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:33,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:33,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1649711513, now seen corresponding path program 46 times [2021-03-11 00:12:33,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:33,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313768093] [2021-03-11 00:12:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:33,534 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-11 00:12:34,050 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-11 00:12:34,503 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-11 00:12:34,668 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-03-11 00:12:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:34,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313768093] [2021-03-11 00:12:34,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508124458] [2021-03-11 00:12:34,743 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:34,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:12:34,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:34,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:12:34,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:35,256 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:12:35,659 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:12:36,512 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:12:37,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:37,188 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:37,189 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 31 [2021-03-11 00:12:37,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:37,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:37,247 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:12:37,248 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:12:37,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:38,945 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 160 DAG size of output: 152 [2021-03-11 00:12:38,947 INFO L628 ElimStorePlain]: treesize reduction 120, result has 75.8 percent of original size [2021-03-11 00:12:38,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:39,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:39,032 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:12:39,064 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:40,522 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 149 DAG size of output: 144 [2021-03-11 00:12:40,524 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.5 percent of original size [2021-03-11 00:12:40,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:40,648 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:40,648 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:12:40,655 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:41,444 WARN L205 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-03-11 00:12:41,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:41,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:41,563 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:41,563 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:12:41,584 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:42,358 WARN L205 SmtUtils]: Spent 773.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-03-11 00:12:42,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:42,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:42,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:42,470 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:12:42,488 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:42,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:42,530 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:12:42,530 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:12:42,536 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:43,823 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 132 DAG size of output: 126 [2021-03-11 00:12:43,825 INFO L628 ElimStorePlain]: treesize reduction 32, result has 89.5 percent of original size [2021-03-11 00:12:43,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:43,926 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:12:43,926 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:12:43,935 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:44,534 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-03-11 00:12:44,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:44,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:44,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:44,619 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:12:44,661 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:45,239 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-11 00:12:45,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:45,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:45,347 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:12:45,348 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:12:45,355 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:45,904 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-11 00:12:45,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:45,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:12:45,964 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:563, output treesize:232 [2021-03-11 00:12:47,075 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-11 00:12:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:47,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:47,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:12:47,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391728644] [2021-03-11 00:12:47,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:12:47,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:47,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:12:47,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:12:47,294 INFO L87 Difference]: Start difference. First operand 2529 states and 8622 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:47,578 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-11 00:12:47,877 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 18 [2021-03-11 00:12:49,215 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-03-11 00:12:49,391 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-03-11 00:12:50,274 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 27 [2021-03-11 00:12:50,661 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-11 00:12:51,136 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:12:51,661 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:12:52,453 WARN L205 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-11 00:12:52,894 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-11 00:12:53,478 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-11 00:12:54,179 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-11 00:12:54,396 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:12:55,371 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-11 00:12:56,221 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-11 00:12:57,067 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-11 00:12:57,979 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2021-03-11 00:12:58,587 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 19 [2021-03-11 00:12:58,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:58,687 INFO L93 Difference]: Finished difference Result 3700 states and 12266 transitions. [2021-03-11 00:12:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:12:58,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:12:58,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:58,699 INFO L225 Difference]: With dead ends: 3700 [2021-03-11 00:12:58,699 INFO L226 Difference]: Without dead ends: 3670 [2021-03-11 00:12:58,699 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 12723.2ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:12:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2021-03-11 00:12:58,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 2539. [2021-03-11 00:12:58,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2539 states, 2538 states have (on average 3.4109535066981875) internal successors, (8657), 2538 states have internal predecessors, (8657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2539 states to 2539 states and 8657 transitions. [2021-03-11 00:12:58,741 INFO L78 Accepts]: Start accepts. Automaton has 2539 states and 8657 transitions. Word has length 26 [2021-03-11 00:12:58,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:58,741 INFO L480 AbstractCegarLoop]: Abstraction has 2539 states and 8657 transitions. [2021-03-11 00:12:58,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:58,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2539 states and 8657 transitions. [2021-03-11 00:12:58,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:12:58,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:58,745 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:58,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3541,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:58,946 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:58,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:58,946 INFO L82 PathProgramCache]: Analyzing trace with hash 955312879, now seen corresponding path program 47 times [2021-03-11 00:12:58,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:58,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953101280] [2021-03-11 00:12:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:59,505 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2021-03-11 00:12:59,835 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-11 00:13:00,139 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-11 00:13:00,323 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-03-11 00:13:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:00,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953101280] [2021-03-11 00:13:00,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032670380] [2021-03-11 00:13:00,410 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:00,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:13:00,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:00,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:13:00,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:01,097 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:13:01,612 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:13:02,439 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-03-11 00:13:03,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:03,196 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:13:03,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:13:03,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:03,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:03,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:03,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:13:03,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:04,894 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-03-11 00:13:04,895 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.1 percent of original size [2021-03-11 00:13:04,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:04,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:04,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:13:04,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:04,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:05,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:05,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:13:05,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:06,698 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-03-11 00:13:06,700 INFO L628 ElimStorePlain]: treesize reduction 4, result has 98.6 percent of original size [2021-03-11 00:13:06,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:06,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:06,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:13:06,789 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:06,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:06,847 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:13:06,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:13:06,856 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:07,615 WARN L205 SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:13:07,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:07,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:07,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:07,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:13:07,706 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:07,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:07,762 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:13:07,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-03-11 00:13:07,768 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:08,447 WARN L205 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-11 00:13:08,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:08,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:08,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:08,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:13:08,524 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:08,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:08,579 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:13:08,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:13:08,589 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:09,229 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-11 00:13:09,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:09,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-11 00:13:09,247 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:387, output treesize:170 [2021-03-11 00:13:09,752 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-03-11 00:13:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:10,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:10,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:13:10,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765993364] [2021-03-11 00:13:10,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:13:10,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:10,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:13:10,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:13:10,054 INFO L87 Difference]: Start difference. First operand 2539 states and 8657 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:10,367 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 17 [2021-03-11 00:13:10,874 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-11 00:13:11,580 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2021-03-11 00:13:12,584 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:13:12,856 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:13:13,479 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-11 00:13:13,901 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:13:14,122 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:13:14,935 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:13:15,301 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:13:16,055 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:13:16,631 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-03-11 00:13:16,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:16,897 INFO L93 Difference]: Finished difference Result 3295 states and 11019 transitions. [2021-03-11 00:13:16,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:13:16,901 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-03-11 00:13:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:16,907 INFO L225 Difference]: With dead ends: 3295 [2021-03-11 00:13:16,908 INFO L226 Difference]: Without dead ends: 3270 [2021-03-11 00:13:16,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 7992.2ms TimeCoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:13:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3270 states. [2021-03-11 00:13:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3270 to 2544. [2021-03-11 00:13:16,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 2543 states have (on average 3.4117184427841134) internal successors, (8676), 2543 states have internal predecessors, (8676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 8676 transitions. [2021-03-11 00:13:16,947 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 8676 transitions. Word has length 26 [2021-03-11 00:13:16,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:16,947 INFO L480 AbstractCegarLoop]: Abstraction has 2544 states and 8676 transitions. [2021-03-11 00:13:16,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:16,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 8676 transitions. [2021-03-11 00:13:16,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:13:16,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:16,950 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] [2021-03-11 00:13:17,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3583 [2021-03-11 00:13:17,151 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:17,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:17,151 INFO L82 PathProgramCache]: Analyzing trace with hash -441885819, now seen corresponding path program 61 times [2021-03-11 00:13:17,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:17,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469456335] [2021-03-11 00:13:17,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:17,520 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-03-11 00:13:17,776 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-11 00:13:17,905 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-03-11 00:13:18,202 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-03-11 00:13:18,351 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-11 00:13:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:18,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469456335] [2021-03-11 00:13:18,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682848414] [2021-03-11 00:13:18,473 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:18,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:13:18,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:19,119 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:13:19,401 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:13:19,791 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:13:21,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:13:21,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:21,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:13:21,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:21,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:13:21,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:21,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:13:21,703 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:21,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:13:21,773 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:21,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:13:21,839 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:21,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:13:21,905 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:21,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:13:21,971 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:21,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:13:22,034 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:22,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:22,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:22,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:13:22,085 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:22,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:22,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:22,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:13:22,137 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:22,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:22,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:22,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:13:22,186 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:22,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:22,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:22,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:13:22,233 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:22,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:22,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:22,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:13:22,280 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:22,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:22,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:22,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:13:22,304 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:22,464 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-03-11 00:13:22,466 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-03-11 00:13:22,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:13:22,471 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-03-11 00:13:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:22,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:22,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:13:22,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37457191] [2021-03-11 00:13:22,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:13:22,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:22,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:13:22,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:13:22,634 INFO L87 Difference]: Start difference. First operand 2544 states and 8676 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:22,842 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2021-03-11 00:13:23,095 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2021-03-11 00:13:23,275 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2021-03-11 00:13:23,504 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-03-11 00:13:23,816 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 22 [2021-03-11 00:13:24,131 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2021-03-11 00:13:24,953 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 18 [2021-03-11 00:13:25,462 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-11 00:13:25,715 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:13:26,064 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:13:26,418 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2021-03-11 00:13:27,014 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-11 00:13:27,640 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-03-11 00:13:28,269 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:13:28,977 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:13:29,548 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-11 00:13:30,108 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-03-11 00:13:30,452 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-11 00:13:31,277 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-11 00:13:32,060 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:13:33,057 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-11 00:13:33,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:33,237 INFO L93 Difference]: Finished difference Result 3486 states and 11580 transitions. [2021-03-11 00:13:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:13:33,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:13:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:33,248 INFO L225 Difference]: With dead ends: 3486 [2021-03-11 00:13:33,248 INFO L226 Difference]: Without dead ends: 3449 [2021-03-11 00:13:33,249 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 9901.0ms TimeCoverageRelationStatistics Valid=459, Invalid=1703, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:13:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3449 states. [2021-03-11 00:13:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3449 to 2605. [2021-03-11 00:13:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 2604 states have (on average 3.4166666666666665) internal successors, (8897), 2604 states have internal predecessors, (8897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:33,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 8897 transitions. [2021-03-11 00:13:33,302 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 8897 transitions. Word has length 26 [2021-03-11 00:13:33,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:33,302 INFO L480 AbstractCegarLoop]: Abstraction has 2605 states and 8897 transitions. [2021-03-11 00:13:33,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:33,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 8897 transitions. [2021-03-11 00:13:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:13:33,306 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:33,306 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] [2021-03-11 00:13:33,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3620,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:33,507 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:33,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:33,507 INFO L82 PathProgramCache]: Analyzing trace with hash 483608047, now seen corresponding path program 62 times [2021-03-11 00:13:33,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:33,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270137936] [2021-03-11 00:13:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:33,848 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-03-11 00:13:33,993 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:13:34,133 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-03-11 00:13:34,437 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-03-11 00:13:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:34,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270137936] [2021-03-11 00:13:34,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441830358] [2021-03-11 00:13:34,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:34,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:13:34,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:34,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:13:34,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:35,186 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:13:35,432 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:13:36,125 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-03-11 00:13:36,432 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_404, v_prenex_402], 5=[A, v_prenex_406]} [2021-03-11 00:13:36,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:36,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:36,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:36,461 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 27 treesize of output 13 [2021-03-11 00:13:36,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:36,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:36,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:36,489 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 20 treesize of output 10 [2021-03-11 00:13:36,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:37,156 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-03-11 00:13:37,158 INFO L628 ElimStorePlain]: treesize reduction 153, result has 42.0 percent of original size [2021-03-11 00:13:37,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:37,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:37,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:37,180 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 23 treesize of output 13 [2021-03-11 00:13:37,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:37,381 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:13:37,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:37,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:37,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:37,400 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 27 treesize of output 13 [2021-03-11 00:13:37,406 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:37,578 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:13:37,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:37,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:37,592 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 27 treesize of output 13 [2021-03-11 00:13:37,598 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:37,750 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:13:37,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:37,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:13:37,762 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:303, output treesize:29 [2021-03-11 00:13:37,944 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 10 [2021-03-11 00:13:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:38,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:38,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:13:38,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124766088] [2021-03-11 00:13:38,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:13:38,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:38,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:13:38,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:13:38,043 INFO L87 Difference]: Start difference. First operand 2605 states and 8897 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:38,270 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 15 [2021-03-11 00:13:38,449 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-11 00:13:38,769 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:13:39,241 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 18 [2021-03-11 00:13:39,670 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-11 00:13:39,971 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:13:40,627 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-03-11 00:13:41,115 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-11 00:13:41,541 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2021-03-11 00:13:42,143 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:13:42,546 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:13:42,942 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:13:43,738 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-11 00:13:44,213 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-11 00:13:44,668 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-11 00:13:45,494 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-11 00:13:46,126 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-11 00:13:46,796 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-11 00:13:47,232 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-11 00:13:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:48,020 INFO L93 Difference]: Finished difference Result 3604 states and 12006 transitions. [2021-03-11 00:13:48,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:13:48,024 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:13:48,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:48,031 INFO L225 Difference]: With dead ends: 3604 [2021-03-11 00:13:48,031 INFO L226 Difference]: Without dead ends: 3564 [2021-03-11 00:13:48,031 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 9085.9ms TimeCoverageRelationStatistics Valid=462, Invalid=1518, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:13:48,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-03-11 00:13:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2583. [2021-03-11 00:13:48,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2583 states, 2582 states have (on average 3.4155693261037956) internal successors, (8819), 2582 states have internal predecessors, (8819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:48,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 8819 transitions. [2021-03-11 00:13:48,075 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 8819 transitions. Word has length 26 [2021-03-11 00:13:48,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:48,075 INFO L480 AbstractCegarLoop]: Abstraction has 2583 states and 8819 transitions. [2021-03-11 00:13:48,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 8819 transitions. [2021-03-11 00:13:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:13:48,079 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:48,079 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:48,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3734 [2021-03-11 00:13:48,280 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:48,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:48,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1928409045, now seen corresponding path program 48 times [2021-03-11 00:13:48,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:48,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444820455] [2021-03-11 00:13:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:48,770 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-03-11 00:13:49,067 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-03-11 00:13:49,532 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-11 00:13:49,714 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-11 00:13:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:49,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444820455] [2021-03-11 00:13:49,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714505721] [2021-03-11 00:13:49,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:49,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:13:49,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:49,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-11 00:13:49,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:50,248 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:13:50,721 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:13:51,137 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-11 00:13:52,082 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-11 00:13:52,889 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2021-03-11 00:13:52,891 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:13:52,891 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 28 treesize of output 32 [2021-03-11 00:13:52,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:52,960 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-03-11 00:13:52,960 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 28 treesize of output 16 [2021-03-11 00:13:52,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:55,236 WARN L205 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 159 DAG size of output: 155 [2021-03-11 00:13:55,238 INFO L628 ElimStorePlain]: treesize reduction 78, result has 85.1 percent of original size [2021-03-11 00:13:55,424 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-11 00:13:55,426 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-03-11 00:13:55,426 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 28 treesize of output 36 [2021-03-11 00:13:55,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-03-11 00:13:57,381 WARN L222 SmtUtils]: Removed 2 from assertion stack [2021-03-11 00:13:57,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3748,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:57,582 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-11 00:13:57,585 WARN L224 ceAbstractionStarter]: Timeout [2021-03-11 00:13:57,586 INFO L202 PluginConnector]: Adding new model max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 12:13:57 BasicIcfg [2021-03-11 00:13:57,586 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 00:13:57,586 INFO L168 Benchmark]: Toolchain (without parser) took 834041.93 ms. Allocated memory was 362.8 MB in the beginning and 436.2 MB in the end (delta: 73.4 MB). Free memory was 343.4 MB in the beginning and 341.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 278.9 MB. Max. memory is 16.0 GB. [2021-03-11 00:13:57,586 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 362.8 MB. Free memory was 344.6 MB in the beginning and 344.5 MB in the end (delta: 78.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:13:57,586 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.66 ms. Allocated memory is still 362.8 MB. Free memory was 342.8 MB in the beginning and 341.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:13:57,586 INFO L168 Benchmark]: Boogie Preprocessor took 13.51 ms. Allocated memory is still 362.8 MB. Free memory was 341.4 MB in the beginning and 340.4 MB in the end (delta: 992.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:13:57,587 INFO L168 Benchmark]: RCFGBuilder took 332.46 ms. Allocated memory is still 362.8 MB. Free memory was 340.3 MB in the beginning and 327.6 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-03-11 00:13:57,587 INFO L168 Benchmark]: TraceAbstraction took 833652.90 ms. Allocated memory was 362.8 MB in the beginning and 436.2 MB in the end (delta: 73.4 MB). Free memory was 327.2 MB in the beginning and 341.8 MB in the end (delta: -14.6 MB). Peak memory consumption was 262.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:13:57,587 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 0.18 ms. Allocated memory is still 362.8 MB. Free memory was 344.6 MB in the beginning and 344.5 MB in the end (delta: 78.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 34.66 ms. Allocated memory is still 362.8 MB. Free memory was 342.8 MB in the beginning and 341.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.51 ms. Allocated memory is still 362.8 MB. Free memory was 341.4 MB in the beginning and 340.4 MB in the end (delta: 992.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 332.46 ms. Allocated memory is still 362.8 MB. Free memory was 340.3 MB in the beginning and 327.6 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 833652.90 ms. Allocated memory was 362.8 MB in the beginning and 436.2 MB in the end (delta: 73.4 MB). Free memory was 327.2 MB in the beginning and 341.8 MB in the end (delta: -14.6 MB). Peak memory consumption was 262.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 65). Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 155 for 1917ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 833527.2ms, OverallIterations: 113, TraceHistogramMax: 2, EmptinessCheckTime: 295.4ms, AutomataDifference: 470457.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 34.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4694 SDtfs, 23212 SDslu, 34250 SDs, 0 SdLazy, 64581 SolverSat, 4057 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63766.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6026 GetRequests, 2039 SyntacticMatches, 107 SemanticMatches, 3880 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47664 ImplicationChecksByTransitivity, 467003.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2605occurred in iteration=111, InterpolantAutomatonStates: 3007, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3345.1ms AutomataMinimizationTime, 112 MinimizatonAttempts, 89027 StatesRemovedByMinimization, 112 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 371.3ms SsaConstructionTime, 1301.6ms SatisfiabilityAnalysisTime, 324104.9ms InterpolantComputationTime, 5558 NumberOfCodeBlocks, 5558 NumberOfCodeBlocksAsserted, 354 NumberOfCheckSat, 5337 ConstructedInterpolants, 110 QuantifiedInterpolants, 125681 SizeOfPredicates, 536 NumberOfNonLiveVariables, 6984 ConjunctsInSsa, 2085 ConjunctsInUnsatCore, 221 InterpolantComputations, 3 PerfectInterpolantSequences, 107/1306 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