/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/min-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 00:08:55,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 00:08:55,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 00:08:55,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 00:08:55,394 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 00:08:55,435 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 00:08:55,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 00:08:55,436 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-11 00:08:55,436 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-11 00:08:55,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 00:08:55,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 00:08:55,440 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 00:08:55,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 00:08:55,440 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 00:08:55,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 00:08:55,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 00:08:55,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 00:08:55,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 00:08:55,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 00:08:55,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 00:08:55,441 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 00:08:55,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 00:08:55,442 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 00:08:55,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 00:08:55,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 00:08:55,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 00:08:55,443 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 00:08:55,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 00:08:55,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:08:55,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 00:08:55,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 00:08:55,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 00:08:55,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 00:08:55,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 00:08:55,443 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 00:08:55,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 00:08:55,444 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 00:08:55,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 00:08:55,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 00:08:55,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 00:08:55,817 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 00:08:55,818 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 00:08:55,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl [2021-03-11 00:08:55,819 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl' [2021-03-11 00:08:55,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 00:08:55,858 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 00:08:55,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 00:08:55,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 00:08:55,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 00:08:55,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:55" (1/1) ... [2021-03-11 00:08:55,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:55" (1/1) ... [2021-03-11 00:08:55,883 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 00:08:55,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 00:08:55,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 00:08:55,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 00:08:55,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:55" (1/1) ... [2021-03-11 00:08:55,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:55" (1/1) ... [2021-03-11 00:08:55,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:55" (1/1) ... [2021-03-11 00:08:55,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:55" (1/1) ... [2021-03-11 00:08:55,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:55" (1/1) ... [2021-03-11 00:08:55,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:55" (1/1) ... [2021-03-11 00:08:55,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:55" (1/1) ... [2021-03-11 00:08:55,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 00:08:55,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 00:08:55,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 00:08:55,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 00:08:55,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:55" (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 00:08:55,969 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 00:08:55,969 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 00:08:55,969 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 00:08:55,969 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 00:08:55,970 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 00:08:55,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 00:08:55,970 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 00:08:55,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 00:08:55,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 00:08:55,970 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 00:08:55,970 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 00:08:55,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 00:08:55,971 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 00:08:56,218 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 00:08:56,218 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 00:08:56,220 INFO L202 PluginConnector]: Adding new model min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:08:56 BoogieIcfgContainer [2021-03-11 00:08:56,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 00:08:56,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 00:08:56,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 00:08:56,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 00:08:56,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:08:55" (1/2) ... [2021-03-11 00:08:56,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b562122 and model type min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 12:08:56, skipping insertion in model container [2021-03-11 00:08:56,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:08:56" (2/2) ... [2021-03-11 00:08:56,226 INFO L111 eAbstractionObserver]: Analyzing ICFG min-fun.wvr.bpl [2021-03-11 00:08:56,231 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 00:08:56,231 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 00:08:56,234 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 00:08:56,235 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 00:08:56,284 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 00:08:56,298 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 00:08:56,314 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 00:08:56,314 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 00:08:56,314 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 00:08:56,314 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 00:08:56,314 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 00:08:56,314 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 00:08:56,314 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 00:08:56,314 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 00:08:56,323 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-03-11 00:08:56,346 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 00:08:56,349 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 00:08:56,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-11 00:08:56,360 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:56,362 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 00:08:56,362 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:56,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:56,373 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-03-11 00:08:56,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:56,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099484425] [2021-03-11 00:08:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:56,603 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 00:08:56,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099484425] [2021-03-11 00:08:56,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:08:56,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 00:08:56,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879207234] [2021-03-11 00:08:56,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 00:08:56,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:56,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 00:08:56,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:08:56,630 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 00:08:56,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:56,686 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-03-11 00:08:56,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 00:08:56,690 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 00:08:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:56,713 INFO L225 Difference]: With dead ends: 217 [2021-03-11 00:08:56,713 INFO L226 Difference]: Without dead ends: 202 [2021-03-11 00:08:56,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:08:56,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-11 00:08:56,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-03-11 00:08:56,780 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 00:08:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-03-11 00:08:56,785 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-03-11 00:08:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:56,786 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-03-11 00:08:56,786 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 00:08:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-03-11 00:08:56,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 00:08:56,792 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:56,792 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 00:08:56,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 00:08:56,792 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:56,796 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-03-11 00:08:56,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:56,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124638383] [2021-03-11 00:08:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:56,883 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 00:08:56,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124638383] [2021-03-11 00:08:56,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:08:56,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:08:56,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589584772] [2021-03-11 00:08:56,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 00:08:56,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:56,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 00:08:56,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 00:08:56,888 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 00:08:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:56,946 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-03-11 00:08:56,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 00:08:56,947 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 00:08:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:56,948 INFO L225 Difference]: With dead ends: 158 [2021-03-11 00:08:56,948 INFO L226 Difference]: Without dead ends: 158 [2021-03-11 00:08:56,949 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:08:56,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-03-11 00:08:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-03-11 00:08:56,957 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 00:08:56,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-03-11 00:08:56,958 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-03-11 00:08:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:56,958 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-03-11 00:08:56,958 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 00:08:56,958 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-03-11 00:08:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 00:08:56,959 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:56,959 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 00:08:56,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 00:08:56,960 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:56,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:56,960 INFO L82 PathProgramCache]: Analyzing trace with hash 275548602, now seen corresponding path program 1 times [2021-03-11 00:08:56,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:56,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601992307] [2021-03-11 00:08:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:57,015 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 00:08:57,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601992307] [2021-03-11 00:08:57,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:08:57,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:08:57,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467710541] [2021-03-11 00:08:57,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:08:57,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:57,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:08:57,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:08:57,019 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 00:08:57,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:57,101 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-03-11 00:08:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 00:08:57,102 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 00:08:57,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:57,103 INFO L225 Difference]: With dead ends: 183 [2021-03-11 00:08:57,103 INFO L226 Difference]: Without dead ends: 183 [2021-03-11 00:08:57,103 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:08:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-11 00:08:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-03-11 00:08:57,117 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 00:08:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-03-11 00:08:57,118 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-03-11 00:08:57,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:57,118 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-03-11 00:08:57,118 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 00:08:57,118 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-03-11 00:08:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:08:57,119 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:57,119 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 00:08:57,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 00:08:57,120 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:57,120 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-03-11 00:08:57,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:57,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035626111] [2021-03-11 00:08:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:57,583 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 00:08:57,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035626111] [2021-03-11 00:08:57,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39250543] [2021-03-11 00:08:57,584 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 00:08:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:57,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:08:57,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:57,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-03-11 00:08:57,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-11 00:08:57,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,957 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 00:08:57,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-11 00:08:57,966 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:57,988 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 00:08:57,989 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:120, output treesize:23 [2021-03-11 00:08:58,056 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 00:08:58,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:58,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:08:58,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277047217] [2021-03-11 00:08:58,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:08:58,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:58,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:08:58,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:08:58,060 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 00:08:58,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:58,336 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-03-11 00:08:58,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:08:58,337 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 22 [2021-03-11 00:08:58,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:58,339 INFO L225 Difference]: With dead ends: 330 [2021-03-11 00:08:58,340 INFO L226 Difference]: Without dead ends: 315 [2021-03-11 00:08:58,340 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 506.0ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:08:58,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-03-11 00:08:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-03-11 00:08:58,362 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 00:08:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-03-11 00:08:58,363 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-03-11 00:08:58,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:58,363 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-03-11 00:08:58,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 00:08:58,363 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-03-11 00:08:58,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:08:58,365 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:58,366 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 00:08:58,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:58,579 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:58,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:58,580 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-03-11 00:08:58,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:58,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397030783] [2021-03-11 00:08:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:58,824 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 00:08:58,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397030783] [2021-03-11 00:08:58,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108209718] [2021-03-11 00:08:58,825 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 00:08:58,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:08:58,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:58,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:08:58,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:59,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:59,160 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 00:08:59,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:59,179 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:59,179 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 00:08:59,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:59,193 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:59,194 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 00:08:59,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:59,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:59,206 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 00:08:59,210 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:59,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:59,265 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 00:08:59,265 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:122 [2021-03-11 00:08:59,437 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 00:08:59,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:59,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-03-11 00:08:59,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359564087] [2021-03-11 00:08:59,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:08:59,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:59,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:08:59,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:08:59,440 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 00:08:59,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:59,939 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-03-11 00:08:59,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:08:59,939 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 00:08:59,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:59,944 INFO L225 Difference]: With dead ends: 374 [2021-03-11 00:08:59,944 INFO L226 Difference]: Without dead ends: 359 [2021-03-11 00:08:59,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 635.9ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:08:59,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-03-11 00:08:59,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-03-11 00:08:59,952 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 00:08:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-03-11 00:08:59,953 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-03-11 00:08:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:59,953 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-03-11 00:08:59,954 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 00:08:59,954 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-03-11 00:08:59,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:08:59,954 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:59,954 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 00:09:00,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:00,176 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:00,176 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-03-11 00:09:00,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:00,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959031307] [2021-03-11 00:09:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:00,346 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 00:09:00,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959031307] [2021-03-11 00:09:00,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211081262] [2021-03-11 00:09:00,351 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 00:09:00,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:09:00,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:00,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-11 00:09:00,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:00,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:00,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:00,587 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 00:09:00,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:00,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:00,597 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 11 treesize of output 3 [2021-03-11 00:09:00,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:00,630 INFO L628 ElimStorePlain]: treesize reduction 35, result has 56.8 percent of original size [2021-03-11 00:09:00,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:00,635 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 00:09:00,638 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:00,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:00,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:09:00,654 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:121, output treesize:21 [2021-03-11 00:09:00,691 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 00:09:00,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:00,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-11 00:09:00,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607609449] [2021-03-11 00:09:00,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:09:00,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:00,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:09:00,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:09:00,693 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 00:09:00,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:00,924 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-03-11 00:09:00,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:09:00,924 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 22 [2021-03-11 00:09:00,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:00,926 INFO L225 Difference]: With dead ends: 296 [2021-03-11 00:09:00,926 INFO L226 Difference]: Without dead ends: 281 [2021-03-11 00:09:00,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 321.3ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:09:00,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-03-11 00:09:00,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-03-11 00:09:00,935 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 00:09:00,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-03-11 00:09:00,936 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-03-11 00:09:00,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:00,936 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-03-11 00:09:00,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 00:09:00,936 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-03-11 00:09:00,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:09:00,937 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:00,937 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 00:09:01,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-11 00:09:01,149 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:01,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:01,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-03-11 00:09:01,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:01,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923309773] [2021-03-11 00:09:01,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:01,374 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 00:09:01,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923309773] [2021-03-11 00:09:01,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424426350] [2021-03-11 00:09:01,375 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 00:09:01,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:09:01,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:01,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:09:01,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:01,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:01,626 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 00:09:01,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,636 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:01,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 00:09:01,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:01,709 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:01,709 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 00:09:01,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:01,721 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 00:09:01,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:01,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:01,792 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 00:09:01,792 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:141, output treesize:122 [2021-03-11 00:09:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:01,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:01,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:09:01,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203018019] [2021-03-11 00:09:01,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:09:01,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:01,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:09:01,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:01,972 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 00:09:02,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:02,372 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-03-11 00:09:02,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:09:02,373 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 00:09:02,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:02,375 INFO L225 Difference]: With dead ends: 425 [2021-03-11 00:09:02,375 INFO L226 Difference]: Without dead ends: 410 [2021-03-11 00:09:02,375 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 547.7ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:09:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-03-11 00:09:02,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-03-11 00:09:02,387 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 00:09:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-03-11 00:09:02,388 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-03-11 00:09:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:02,390 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-03-11 00:09:02,390 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 00:09:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-03-11 00:09:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:02,391 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:02,391 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 00:09:02,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-11 00:09:02,599 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:02,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:02,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-03-11 00:09:02,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:02,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069092753] [2021-03-11 00:09:02,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:02,646 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 00:09:02,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069092753] [2021-03-11 00:09:02,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649524890] [2021-03-11 00:09:02,647 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 00:09:02,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:09:02,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:02,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:02,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:02,758 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 00:09:02,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:02,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:09:02,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908160899] [2021-03-11 00:09:02,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:09:02,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:02,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:09:02,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:09:02,761 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 00:09:03,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:03,138 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-03-11 00:09:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:09:03,144 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 00:09:03,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:03,147 INFO L225 Difference]: With dead ends: 619 [2021-03-11 00:09:03,147 INFO L226 Difference]: Without dead ends: 619 [2021-03-11 00:09:03,148 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:09:03,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-03-11 00:09:03,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-03-11 00:09:03,168 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 00:09:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-03-11 00:09:03,169 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-03-11 00:09:03,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:03,169 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-03-11 00:09:03,170 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 00:09:03,170 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-03-11 00:09:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:03,173 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:03,173 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 00:09:03,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-11 00:09:03,383 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:03,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:03,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-03-11 00:09:03,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:03,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144310340] [2021-03-11 00:09:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:03,422 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 00:09:03,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144310340] [2021-03-11 00:09:03,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383443651] [2021-03-11 00:09:03,423 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 00:09:03,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:09:03,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:03,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:03,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:03,531 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 00:09:03,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:03,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:09:03,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428613982] [2021-03-11 00:09:03,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:09:03,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:03,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:09:03,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:03,533 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 00:09:04,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:04,285 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-03-11 00:09:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:09:04,286 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 00:09:04,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:04,291 INFO L225 Difference]: With dead ends: 1078 [2021-03-11 00:09:04,291 INFO L226 Difference]: Without dead ends: 1078 [2021-03-11 00:09:04,292 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:09:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-03-11 00:09:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-03-11 00:09:04,306 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 00:09:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-03-11 00:09:04,308 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-03-11 00:09:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:04,308 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-03-11 00:09:04,308 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 00:09:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-03-11 00:09:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:04,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:04,311 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 00:09:04,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:04,519 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:04,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:04,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-03-11 00:09:04,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:04,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846003010] [2021-03-11 00:09:04,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:04,562 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 00:09:04,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846003010] [2021-03-11 00:09:04,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143383996] [2021-03-11 00:09:04,562 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 00:09:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:04,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:04,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:04,709 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 00:09:04,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:04,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:09:04,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943284105] [2021-03-11 00:09:04,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:09:04,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:04,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:09:04,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:04,712 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 00:09:05,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:05,382 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-03-11 00:09:05,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:09:05,383 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 00:09:05,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:05,387 INFO L225 Difference]: With dead ends: 951 [2021-03-11 00:09:05,387 INFO L226 Difference]: Without dead ends: 951 [2021-03-11 00:09:05,388 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 430.4ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:09:05,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-03-11 00:09:05,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-03-11 00:09:05,400 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 00:09:05,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-03-11 00:09:05,402 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-03-11 00:09:05,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:05,402 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-03-11 00:09:05,402 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 00:09:05,402 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-03-11 00:09:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:05,403 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:05,403 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, 1, 1, 1, 1] [2021-03-11 00:09:05,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-11 00:09:05,619 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:05,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:05,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-03-11 00:09:05,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:05,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773852351] [2021-03-11 00:09:05,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:05,658 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 00:09:05,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773852351] [2021-03-11 00:09:05,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114058962] [2021-03-11 00:09:05,658 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) [2021-03-11 00:09:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:05,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:09:05,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:05,734 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 00:09:05,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:05,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:09:05,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794603771] [2021-03-11 00:09:05,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:09:05,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:05,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:09:05,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:09:05,737 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 00:09:05,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:05,841 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-03-11 00:09:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:09:05,841 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 00:09:05,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:05,846 INFO L225 Difference]: With dead ends: 669 [2021-03-11 00:09:05,846 INFO L226 Difference]: Without dead ends: 663 [2021-03-11 00:09:05,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:05,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-03-11 00:09:05,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-03-11 00:09:05,858 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 00:09:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-03-11 00:09:05,861 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-03-11 00:09:05,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:05,861 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-03-11 00:09:05,862 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 00:09:05,862 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-03-11 00:09:05,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:05,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:05,865 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 00:09:06,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-11 00:09:06,079 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:06,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:06,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-03-11 00:09:06,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:06,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677852266] [2021-03-11 00:09:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:06,128 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 00:09:06,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677852266] [2021-03-11 00:09:06,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239436699] [2021-03-11 00:09:06,129 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 00:09:06,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:09:06,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:06,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:06,258 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 00:09:06,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:06,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:09:06,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76836046] [2021-03-11 00:09:06,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:09:06,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:06,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:09:06,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:06,259 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 00:09:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:06,438 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-03-11 00:09:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:09:06,439 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 00:09:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:06,447 INFO L225 Difference]: With dead ends: 710 [2021-03-11 00:09:06,447 INFO L226 Difference]: Without dead ends: 672 [2021-03-11 00:09:06,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:09:06,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-03-11 00:09:06,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-03-11 00:09:06,461 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 00:09:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-03-11 00:09:06,463 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-03-11 00:09:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:06,463 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-03-11 00:09:06,464 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 00:09:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-03-11 00:09:06,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:06,465 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:06,465 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 00:09:06,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-11 00:09:06,683 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:06,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:06,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-03-11 00:09:06,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:06,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540807525] [2021-03-11 00:09:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:06,711 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 00:09:06,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540807525] [2021-03-11 00:09:06,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638851053] [2021-03-11 00:09:06,712 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 00:09:06,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:09:06,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:06,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:09:06,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:06,789 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 00:09:06,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:06,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:09:06,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721965062] [2021-03-11 00:09:06,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:09:06,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:06,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:09:06,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:09:06,790 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 00:09:06,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:06,901 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-03-11 00:09:06,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:09:06,901 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 00:09:06,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:06,905 INFO L225 Difference]: With dead ends: 830 [2021-03-11 00:09:06,905 INFO L226 Difference]: Without dead ends: 830 [2021-03-11 00:09:06,905 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-03-11 00:09:06,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-03-11 00:09:06,920 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 00:09:06,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-03-11 00:09:06,923 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-03-11 00:09:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:06,923 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-03-11 00:09:06,923 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 00:09:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-03-11 00:09:06,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:06,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:06,925 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 00:09:07,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:07,139 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:07,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:07,140 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-03-11 00:09:07,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:07,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545228459] [2021-03-11 00:09:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:07,180 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 00:09:07,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545228459] [2021-03-11 00:09:07,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318552461] [2021-03-11 00:09:07,180 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 00:09:07,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:09:07,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:07,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:07,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:07,277 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 00:09:07,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:07,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:09:07,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782285410] [2021-03-11 00:09:07,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:09:07,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:07,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:09:07,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:09:07,280 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 00:09:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:07,584 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-03-11 00:09:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:09:07,585 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 00:09:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:07,589 INFO L225 Difference]: With dead ends: 1196 [2021-03-11 00:09:07,589 INFO L226 Difference]: Without dead ends: 1196 [2021-03-11 00:09:07,590 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:09:07,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-03-11 00:09:07,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-03-11 00:09:07,605 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 00:09:07,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-03-11 00:09:07,607 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-03-11 00:09:07,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:07,608 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-03-11 00:09:07,608 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 00:09:07,608 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-03-11 00:09:07,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:07,609 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:07,609 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 00:09:07,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-03-11 00:09:07,826 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:07,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:07,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-03-11 00:09:07,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:07,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573051443] [2021-03-11 00:09:07,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:07,869 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 00:09:07,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573051443] [2021-03-11 00:09:07,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928071638] [2021-03-11 00:09:07,869 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 00:09:07,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:09:07,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:07,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:07,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:07,976 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 00:09:07,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:07,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:09:07,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407476177] [2021-03-11 00:09:07,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:09:07,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:07,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:09:07,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:09:07,980 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 00:09:08,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:08,416 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-03-11 00:09:08,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:09:08,417 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 00:09:08,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:08,423 INFO L225 Difference]: With dead ends: 1492 [2021-03-11 00:09:08,424 INFO L226 Difference]: Without dead ends: 1492 [2021-03-11 00:09:08,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 251.2ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:09:08,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-03-11 00:09:08,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-03-11 00:09:08,450 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 00:09:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-03-11 00:09:08,452 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-03-11 00:09:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:08,453 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-03-11 00:09:08,453 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 00:09:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-03-11 00:09:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:08,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:08,455 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 00:09:08,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:08,671 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:08,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:08,672 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-03-11 00:09:08,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:08,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769904398] [2021-03-11 00:09:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:08,717 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 00:09:08,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769904398] [2021-03-11 00:09:08,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990679009] [2021-03-11 00:09:08,717 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 00:09:08,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:09:08,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:08,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:08,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:08,817 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 00:09:08,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:08,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:09:08,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989067644] [2021-03-11 00:09:08,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:09:08,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:08,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:09:08,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:08,819 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 00:09:09,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:09,068 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-03-11 00:09:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:09:09,068 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 00:09:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:09,073 INFO L225 Difference]: With dead ends: 1258 [2021-03-11 00:09:09,074 INFO L226 Difference]: Without dead ends: 1248 [2021-03-11 00:09:09,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:09:09,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-03-11 00:09:09,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-03-11 00:09:09,094 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 00:09:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-03-11 00:09:09,097 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-03-11 00:09:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:09,098 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-03-11 00:09:09,098 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 00:09:09,098 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-03-11 00:09:09,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:09,099 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:09,100 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 00:09:09,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-03-11 00:09:09,315 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:09,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:09,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-03-11 00:09:09,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:09,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929103268] [2021-03-11 00:09:09,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:09,351 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 00:09:09,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929103268] [2021-03-11 00:09:09,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897602408] [2021-03-11 00:09:09,352 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 00:09:09,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:09:09,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:09,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:09,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:09,461 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 00:09:09,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:09,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:09:09,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798767857] [2021-03-11 00:09:09,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:09:09,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:09,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:09:09,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:09,462 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 00:09:09,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:09,745 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-03-11 00:09:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:09:09,746 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 00:09:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:09,751 INFO L225 Difference]: With dead ends: 1329 [2021-03-11 00:09:09,751 INFO L226 Difference]: Without dead ends: 1329 [2021-03-11 00:09:09,751 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:09:09,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-03-11 00:09:09,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-03-11 00:09:09,769 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 00:09:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-03-11 00:09:09,772 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-03-11 00:09:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:09,772 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-03-11 00:09:09,772 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 00:09:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-03-11 00:09:09,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:09,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:09,774 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 00:09:09,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:09,987 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:09,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:09,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-03-11 00:09:09,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:09,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402581794] [2021-03-11 00:09:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:10,048 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 00:09:10,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402581794] [2021-03-11 00:09:10,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321605807] [2021-03-11 00:09:10,048 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 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 00:09:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:10,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:10,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:10,139 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 00:09:10,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:10,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:09:10,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824509967] [2021-03-11 00:09:10,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:09:10,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:10,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:09:10,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:09:10,141 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 00:09:10,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:10,509 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-03-11 00:09:10,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:09:10,510 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 00:09:10,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:10,516 INFO L225 Difference]: With dead ends: 1548 [2021-03-11 00:09:10,517 INFO L226 Difference]: Without dead ends: 1544 [2021-03-11 00:09:10,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:09:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-03-11 00:09:10,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-03-11 00:09:10,538 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 00:09:10,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-03-11 00:09:10,541 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-03-11 00:09:10,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:10,541 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-03-11 00:09:10,541 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 00:09:10,541 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-03-11 00:09:10,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:10,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:10,543 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 00:09:10,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-11 00:09:10,759 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:10,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:10,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-03-11 00:09:10,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:10,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905563817] [2021-03-11 00:09:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:10,809 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 00:09:10,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905563817] [2021-03-11 00:09:10,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183260876] [2021-03-11 00:09:10,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:09:10,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:09:10,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:10,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:10,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:10,929 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 00:09:10,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:10,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:09:10,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467241439] [2021-03-11 00:09:10,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:09:10,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:10,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:09:10,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:10,930 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 00:09:11,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:11,666 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-03-11 00:09:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:09:11,666 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 00:09:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:11,677 INFO L225 Difference]: With dead ends: 2734 [2021-03-11 00:09:11,678 INFO L226 Difference]: Without dead ends: 2734 [2021-03-11 00:09:11,678 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 430.3ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:09:11,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-03-11 00:09:11,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-03-11 00:09:11,726 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 00:09:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-03-11 00:09:11,729 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-03-11 00:09:11,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:11,729 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-03-11 00:09:11,729 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 00:09:11,729 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-03-11 00:09:11,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:11,732 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:11,732 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 00:09:11,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:11,937 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:11,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-03-11 00:09:11,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:11,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924911843] [2021-03-11 00:09:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:11,980 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 00:09:11,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924911843] [2021-03-11 00:09:11,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549318337] [2021-03-11 00:09:11,980 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) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:12,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:09:12,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:12,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:12,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:12,090 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 00:09:12,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:12,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:09:12,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90320604] [2021-03-11 00:09:12,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:09:12,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:12,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:09:12,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:12,091 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 00:09:12,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:12,811 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-03-11 00:09:12,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:09:12,811 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 00:09:12,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:12,820 INFO L225 Difference]: With dead ends: 2693 [2021-03-11 00:09:12,820 INFO L226 Difference]: Without dead ends: 2693 [2021-03-11 00:09:12,821 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 407.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:09:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-03-11 00:09:12,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-03-11 00:09:12,852 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 00:09:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-03-11 00:09:12,855 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-03-11 00:09:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:12,855 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-03-11 00:09:12,855 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 00:09:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-03-11 00:09:12,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:12,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:12,861 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 00:09:13,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-11 00:09:13,067 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:13,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:13,067 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-03-11 00:09:13,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:13,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055718650] [2021-03-11 00:09:13,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:13,108 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 00:09:13,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055718650] [2021-03-11 00:09:13,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722572812] [2021-03-11 00:09:13,108 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 00:09:13,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:09:13,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:13,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:13,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:13,228 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 00:09:13,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:13,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:09:13,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015425383] [2021-03-11 00:09:13,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:09:13,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:13,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:09:13,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:09:13,230 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 00:09:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:13,874 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-03-11 00:09:13,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:09:13,875 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 00:09:13,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:13,881 INFO L225 Difference]: With dead ends: 2677 [2021-03-11 00:09:13,882 INFO L226 Difference]: Without dead ends: 2677 [2021-03-11 00:09:13,882 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 362.9ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:09:13,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-03-11 00:09:13,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-03-11 00:09:13,913 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 00:09:13,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-03-11 00:09:13,916 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-03-11 00:09:13,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:13,916 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-03-11 00:09:13,917 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 00:09:13,917 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-03-11 00:09:13,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:13,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:13,920 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] [2021-03-11 00:09:14,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-11 00:09:14,135 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:14,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:14,136 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-03-11 00:09:14,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:14,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802385109] [2021-03-11 00:09:14,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:14,176 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 00:09:14,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802385109] [2021-03-11 00:09:14,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954029408] [2021-03-11 00:09:14,176 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) [2021-03-11 00:09:14,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:09:14,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:14,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:14,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:14,269 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 00:09:14,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:14,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:09:14,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738665340] [2021-03-11 00:09:14,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:09:14,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:14,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:09:14,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:09:14,270 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 00:09:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:14,833 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-03-11 00:09:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:09:14,833 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 00:09:14,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:14,840 INFO L225 Difference]: With dead ends: 2474 [2021-03-11 00:09:14,840 INFO L226 Difference]: Without dead ends: 2470 [2021-03-11 00:09:14,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:09:14,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-03-11 00:09:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-03-11 00:09:14,869 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 00:09:14,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-03-11 00:09:14,872 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-03-11 00:09:14,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:14,872 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-03-11 00:09:14,872 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 00:09:14,872 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-03-11 00:09:14,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:14,874 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:14,874 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 00:09:15,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-11 00:09:15,083 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:15,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:15,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-03-11 00:09:15,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:15,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017349811] [2021-03-11 00:09:15,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:15,118 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 00:09:15,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017349811] [2021-03-11 00:09:15,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67562054] [2021-03-11 00:09:15,119 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 00:09:15,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:09:15,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:15,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:15,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:15,232 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 00:09:15,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:15,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:09:15,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333224501] [2021-03-11 00:09:15,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:09:15,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:15,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:09:15,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:15,233 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 00:09:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:15,882 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-03-11 00:09:15,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:09:15,883 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 00:09:15,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:15,889 INFO L225 Difference]: With dead ends: 2514 [2021-03-11 00:09:15,890 INFO L226 Difference]: Without dead ends: 2514 [2021-03-11 00:09:15,890 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 368.7ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:09:15,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-03-11 00:09:15,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-03-11 00:09:15,920 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 00:09:15,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-03-11 00:09:15,924 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-03-11 00:09:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:15,924 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-03-11 00:09:15,924 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 00:09:15,924 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-03-11 00:09:15,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:15,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:15,927 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 00:09:16,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-03-11 00:09:16,135 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:16,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:16,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-03-11 00:09:16,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:16,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414522658] [2021-03-11 00:09:16,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:16,168 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 00:09:16,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414522658] [2021-03-11 00:09:16,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023580514] [2021-03-11 00:09:16,168 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) [2021-03-11 00:09:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:16,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:16,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:16,264 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 00:09:16,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:16,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:09:16,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386216484] [2021-03-11 00:09:16,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:09:16,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:16,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:09:16,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:16,267 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 00:09:16,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:16,922 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-03-11 00:09:16,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:09:16,923 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 00:09:16,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:16,929 INFO L225 Difference]: With dead ends: 2332 [2021-03-11 00:09:16,929 INFO L226 Difference]: Without dead ends: 2328 [2021-03-11 00:09:16,930 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:09:16,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-03-11 00:09:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-03-11 00:09:16,957 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 00:09:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-03-11 00:09:16,960 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-03-11 00:09:16,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:16,960 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-03-11 00:09:16,960 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 00:09:16,961 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-03-11 00:09:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:16,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:16,963 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 00:09:17,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:17,179 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:17,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:17,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-03-11 00:09:17,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:17,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540562077] [2021-03-11 00:09:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:17,205 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 00:09:17,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540562077] [2021-03-11 00:09:17,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563196768] [2021-03-11 00:09:17,205 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 00:09:17,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:09:17,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:17,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:09:17,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:17,285 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 00:09:17,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:17,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:09:17,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048602185] [2021-03-11 00:09:17,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:09:17,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:17,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:09:17,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:09:17,287 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 00:09:17,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:17,364 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-03-11 00:09:17,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:09:17,365 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 00:09:17,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:17,367 INFO L225 Difference]: With dead ends: 929 [2021-03-11 00:09:17,368 INFO L226 Difference]: Without dead ends: 929 [2021-03-11 00:09:17,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:09:17,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-03-11 00:09:17,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-03-11 00:09:17,380 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 00:09:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-03-11 00:09:17,383 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-03-11 00:09:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:17,383 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-03-11 00:09:17,383 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 00:09:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-03-11 00:09:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:17,385 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:17,385 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 00:09:17,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:17,602 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:17,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:17,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-03-11 00:09:17,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:17,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608721918] [2021-03-11 00:09:17,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:17,642 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 00:09:17,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608721918] [2021-03-11 00:09:17,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284481780] [2021-03-11 00:09:17,642 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 00:09:17,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:09:17,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:17,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:17,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:17,727 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 00:09:17,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:17,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:09:17,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936453825] [2021-03-11 00:09:17,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:09:17,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:17,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:09:17,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:09:17,729 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 00:09:18,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:18,027 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-03-11 00:09:18,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:09:18,028 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 00:09:18,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:18,032 INFO L225 Difference]: With dead ends: 1555 [2021-03-11 00:09:18,032 INFO L226 Difference]: Without dead ends: 1555 [2021-03-11 00:09:18,032 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:09:18,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-03-11 00:09:18,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-03-11 00:09:18,064 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 00:09:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-03-11 00:09:18,067 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-03-11 00:09:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:18,067 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-03-11 00:09:18,067 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 00:09:18,067 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-03-11 00:09:18,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:18,069 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:18,069 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 00:09:18,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-03-11 00:09:18,270 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:18,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:18,271 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-03-11 00:09:18,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:18,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404456118] [2021-03-11 00:09:18,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:18,303 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 00:09:18,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404456118] [2021-03-11 00:09:18,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80651142] [2021-03-11 00:09:18,304 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 00:09:18,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:09:18,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:18,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:18,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:18,376 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 00:09:18,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:18,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:09:18,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247519854] [2021-03-11 00:09:18,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:09:18,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:18,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:09:18,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:09:18,377 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 00:09:18,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:18,618 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-03-11 00:09:18,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:09:18,618 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 00:09:18,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:18,621 INFO L225 Difference]: With dead ends: 1605 [2021-03-11 00:09:18,621 INFO L226 Difference]: Without dead ends: 1605 [2021-03-11 00:09:18,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:09:18,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-03-11 00:09:18,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-03-11 00:09:18,635 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 00:09:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-03-11 00:09:18,637 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-03-11 00:09:18,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:18,637 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-03-11 00:09:18,637 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 00:09:18,637 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-03-11 00:09:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:18,639 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:18,639 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 00:09:18,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:18,855 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:18,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:18,856 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-03-11 00:09:18,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:18,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203688202] [2021-03-11 00:09:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:18,884 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 00:09:18,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203688202] [2021-03-11 00:09:18,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328399612] [2021-03-11 00:09:18,885 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 00:09:18,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:09:18,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:18,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:18,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:18,960 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 00:09:18,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:18,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:09:18,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557631438] [2021-03-11 00:09:18,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:09:18,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:18,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:09:18,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:09:18,961 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 00:09:19,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:19,161 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-03-11 00:09:19,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:09:19,162 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 00:09:19,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:19,166 INFO L225 Difference]: With dead ends: 1524 [2021-03-11 00:09:19,166 INFO L226 Difference]: Without dead ends: 1520 [2021-03-11 00:09:19,166 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:09:19,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-03-11 00:09:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-03-11 00:09:19,183 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 00:09:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-03-11 00:09:19,186 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-03-11 00:09:19,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:19,186 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-03-11 00:09:19,186 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 00:09:19,186 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-03-11 00:09:19,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:19,189 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:19,189 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 00:09:19,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-11 00:09:19,407 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:19,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:19,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-03-11 00:09:19,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:19,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458948450] [2021-03-11 00:09:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:19,439 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 00:09:19,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458948450] [2021-03-11 00:09:19,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444139655] [2021-03-11 00:09:19,440 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 00:09:19,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:09:19,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:19,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:19,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:19,514 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 00:09:19,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:19,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:09:19,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177489438] [2021-03-11 00:09:19,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:09:19,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:19,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:09:19,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:09:19,517 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 00:09:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:19,793 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-03-11 00:09:19,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:09:19,794 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 00:09:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:19,814 INFO L225 Difference]: With dead ends: 1508 [2021-03-11 00:09:19,814 INFO L226 Difference]: Without dead ends: 1496 [2021-03-11 00:09:19,816 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:09:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-03-11 00:09:19,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-03-11 00:09:19,834 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 00:09:19,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-03-11 00:09:19,838 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-03-11 00:09:19,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:19,838 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-03-11 00:09:19,840 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 00:09:19,840 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-03-11 00:09:19,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:19,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:19,842 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 00:09:20,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-11 00:09:20,059 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:20,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:20,059 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-03-11 00:09:20,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:20,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254629673] [2021-03-11 00:09:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:20,099 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 00:09:20,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254629673] [2021-03-11 00:09:20,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875781720] [2021-03-11 00:09:20,099 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 00:09:20,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:09:20,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:20,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:20,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:20,206 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 00:09:20,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:20,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:09:20,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523925508] [2021-03-11 00:09:20,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:09:20,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:20,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:09:20,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:20,207 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 00:09:20,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:20,722 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-03-11 00:09:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:09:20,722 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 00:09:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:20,729 INFO L225 Difference]: With dead ends: 2412 [2021-03-11 00:09:20,729 INFO L226 Difference]: Without dead ends: 2412 [2021-03-11 00:09:20,730 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 330.3ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:09:20,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-03-11 00:09:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-03-11 00:09:20,756 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 00:09:20,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-03-11 00:09:20,759 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-03-11 00:09:20,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:20,760 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-03-11 00:09:20,760 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 00:09:20,760 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-03-11 00:09:20,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:20,762 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:20,762 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 00:09:20,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-11 00:09:20,975 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:20,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:20,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-03-11 00:09:20,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:20,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628578461] [2021-03-11 00:09:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:21,025 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 00:09:21,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628578461] [2021-03-11 00:09:21,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122989000] [2021-03-11 00:09:21,025 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 00:09:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:21,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:21,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:21,128 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 00:09:21,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:21,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:09:21,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196792108] [2021-03-11 00:09:21,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:09:21,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:21,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:09:21,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:21,129 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 00:09:21,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:21,603 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-03-11 00:09:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:09:21,604 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 00:09:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:21,609 INFO L225 Difference]: With dead ends: 2335 [2021-03-11 00:09:21,609 INFO L226 Difference]: Without dead ends: 2335 [2021-03-11 00:09:21,610 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:09:21,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-03-11 00:09:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-03-11 00:09:21,642 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 00:09:21,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:09:21,645 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:09:21,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:21,645 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:09:21,645 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 00:09:21,645 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:09:21,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:21,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:21,647 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 00:09:21,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-11 00:09:21,863 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:21,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:21,864 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-03-11 00:09:21,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:21,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657643325] [2021-03-11 00:09:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:21,905 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 00:09:21,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657643325] [2021-03-11 00:09:21,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820388087] [2021-03-11 00:09:21,905 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 00:09:21,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:09:21,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:21,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:21,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:22,005 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 00:09:22,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:22,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:09:22,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020810290] [2021-03-11 00:09:22,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:09:22,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:22,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:09:22,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:09:22,006 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 00:09:22,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:22,420 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-03-11 00:09:22,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:09:22,422 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 00:09:22,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:22,427 INFO L225 Difference]: With dead ends: 2285 [2021-03-11 00:09:22,427 INFO L226 Difference]: Without dead ends: 2285 [2021-03-11 00:09:22,428 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:09:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-03-11 00:09:22,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-03-11 00:09:22,452 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 00:09:22,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-03-11 00:09:22,455 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-03-11 00:09:22,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:22,455 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-03-11 00:09:22,455 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 00:09:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-03-11 00:09:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:22,457 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:22,457 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 00:09:22,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-11 00:09:22,676 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:22,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:22,677 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-03-11 00:09:22,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:22,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038379111] [2021-03-11 00:09:22,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:22,712 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 00:09:22,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038379111] [2021-03-11 00:09:22,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863866677] [2021-03-11 00:09:22,712 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) [2021-03-11 00:09:22,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:09:22,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:22,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:22,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:22,809 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 00:09:22,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:22,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:09:22,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650394437] [2021-03-11 00:09:22,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:09:22,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:22,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:09:22,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:09:22,811 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 00:09:23,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:23,220 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-03-11 00:09:23,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:09:23,221 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 00:09:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:23,225 INFO L225 Difference]: With dead ends: 2176 [2021-03-11 00:09:23,225 INFO L226 Difference]: Without dead ends: 2172 [2021-03-11 00:09:23,226 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:09:23,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-03-11 00:09:23,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-03-11 00:09:23,247 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 00:09:23,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:09:23,250 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:09:23,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:23,250 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:09:23,250 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 00:09:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:09:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:23,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:23,252 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 00:09:23,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:23,456 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:23,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:23,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-03-11 00:09:23,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:23,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107187075] [2021-03-11 00:09:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:23,514 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 00:09:23,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107187075] [2021-03-11 00:09:23,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574407480] [2021-03-11 00:09:23,515 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 00:09:23,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:09:23,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:23,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:23,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:23,617 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 00:09:23,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:23,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:09:23,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408279355] [2021-03-11 00:09:23,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:09:23,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:23,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:09:23,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:23,618 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 00:09:23,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:23,994 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-03-11 00:09:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:09:23,995 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 00:09:23,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:23,999 INFO L225 Difference]: With dead ends: 2199 [2021-03-11 00:09:23,999 INFO L226 Difference]: Without dead ends: 2199 [2021-03-11 00:09:24,000 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:09:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-03-11 00:09:24,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-03-11 00:09:24,021 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 00:09:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-03-11 00:09:24,024 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-03-11 00:09:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:24,024 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-03-11 00:09:24,024 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 00:09:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-03-11 00:09:24,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:24,026 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:24,027 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 00:09:24,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:24,241 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-03-11 00:09:24,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:24,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945660883] [2021-03-11 00:09:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:24,285 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 00:09:24,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945660883] [2021-03-11 00:09:24,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330080759] [2021-03-11 00:09:24,286 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 00:09:24,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:09:24,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:24,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:24,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:24,378 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 00:09:24,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:24,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:09:24,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025847275] [2021-03-11 00:09:24,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:09:24,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:24,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:09:24,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:24,379 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 00:09:24,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:24,748 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-03-11 00:09:24,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:09:24,748 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 00:09:24,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:24,753 INFO L225 Difference]: With dead ends: 2156 [2021-03-11 00:09:24,753 INFO L226 Difference]: Without dead ends: 2152 [2021-03-11 00:09:24,753 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 225.2ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:09:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-03-11 00:09:24,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-03-11 00:09:24,776 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 00:09:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:09:24,779 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:09:24,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:24,779 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:09:24,779 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 00:09:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:09:24,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:24,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:24,781 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 00:09:24,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-03-11 00:09:24,999 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:24,999 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-03-11 00:09:25,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:25,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288861142] [2021-03-11 00:09:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:25,033 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 00:09:25,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288861142] [2021-03-11 00:09:25,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521377389] [2021-03-11 00:09:25,034 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) [2021-03-11 00:09:25,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:09:25,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:25,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:25,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:25,131 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 00:09:25,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:25,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:09:25,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679225945] [2021-03-11 00:09:25,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:09:25,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:25,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:09:25,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:09:25,133 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 00:09:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:25,487 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-03-11 00:09:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:09:25,488 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 00:09:25,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:25,491 INFO L225 Difference]: With dead ends: 2097 [2021-03-11 00:09:25,492 INFO L226 Difference]: Without dead ends: 2097 [2021-03-11 00:09:25,492 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 216.7ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:09:25,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-03-11 00:09:25,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-03-11 00:09:25,515 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 00:09:25,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-03-11 00:09:25,517 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-03-11 00:09:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:25,518 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-03-11 00:09:25,518 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 00:09:25,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-03-11 00:09:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:25,520 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:25,520 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 00:09:25,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:25,720 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:25,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:25,721 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-03-11 00:09:25,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:25,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907839320] [2021-03-11 00:09:25,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:25,753 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 00:09:25,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907839320] [2021-03-11 00:09:25,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965700458] [2021-03-11 00:09:25,754 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) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:25,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:25,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:25,833 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 00:09:25,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:25,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:09:25,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105741031] [2021-03-11 00:09:25,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:09:25,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:25,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:09:25,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:09:25,837 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 00:09:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:26,156 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-03-11 00:09:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:09:26,157 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 00:09:26,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:26,161 INFO L225 Difference]: With dead ends: 1963 [2021-03-11 00:09:26,161 INFO L226 Difference]: Without dead ends: 1959 [2021-03-11 00:09:26,161 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:09:26,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-03-11 00:09:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-03-11 00:09:26,183 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 00:09:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-03-11 00:09:26,186 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-03-11 00:09:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:26,186 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-03-11 00:09:26,186 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 00:09:26,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-03-11 00:09:26,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:26,189 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:26,189 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 00:09:26,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-03-11 00:09:26,407 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:26,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:26,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-03-11 00:09:26,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:26,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653864609] [2021-03-11 00:09:26,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:26,443 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 00:09:26,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653864609] [2021-03-11 00:09:26,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864164039] [2021-03-11 00:09:26,444 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) [2021-03-11 00:09:26,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:09:26,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:26,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:26,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:26,523 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 00:09:26,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:26,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:09:26,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787096952] [2021-03-11 00:09:26,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:09:26,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:26,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:09:26,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:09:26,526 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 00:09:26,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:26,768 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-03-11 00:09:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:09:26,769 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 00:09:26,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:26,772 INFO L225 Difference]: With dead ends: 1728 [2021-03-11 00:09:26,772 INFO L226 Difference]: Without dead ends: 1716 [2021-03-11 00:09:26,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:09:26,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-03-11 00:09:26,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-03-11 00:09:26,790 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 00:09:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-03-11 00:09:26,794 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-03-11 00:09:26,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:26,794 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-03-11 00:09:26,794 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 00:09:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-03-11 00:09:26,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:26,796 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:26,796 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 00:09:27,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:27,003 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:27,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:27,003 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-03-11 00:09:27,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:27,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386336758] [2021-03-11 00:09:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:27,038 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 00:09:27,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386336758] [2021-03-11 00:09:27,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720971975] [2021-03-11 00:09:27,038 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 00:09:27,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:09:27,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:27,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:27,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:27,132 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 00:09:27,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:27,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:09:27,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675115476] [2021-03-11 00:09:27,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:09:27,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:27,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:09:27,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:27,133 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 00:09:27,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:27,459 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-03-11 00:09:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:09:27,460 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 00:09:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:27,463 INFO L225 Difference]: With dead ends: 1821 [2021-03-11 00:09:27,463 INFO L226 Difference]: Without dead ends: 1821 [2021-03-11 00:09:27,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:09:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-03-11 00:09:27,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-03-11 00:09:27,486 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 00:09:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-03-11 00:09:27,489 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-03-11 00:09:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:27,489 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-03-11 00:09:27,490 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 00:09:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-03-11 00:09:27,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:27,492 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:27,492 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 00:09:27,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-03-11 00:09:27,703 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:27,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:27,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-03-11 00:09:27,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:27,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235488016] [2021-03-11 00:09:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:27,739 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 00:09:27,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235488016] [2021-03-11 00:09:27,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56004232] [2021-03-11 00:09:27,739 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 00:09:27,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:09:27,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:27,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:27,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:27,844 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 00:09:27,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:27,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:09:27,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611036292] [2021-03-11 00:09:27,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:09:27,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:27,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:09:27,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:09:27,845 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 00:09:28,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:28,119 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-03-11 00:09:28,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:09:28,120 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 00:09:28,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:28,123 INFO L225 Difference]: With dead ends: 1790 [2021-03-11 00:09:28,123 INFO L226 Difference]: Without dead ends: 1786 [2021-03-11 00:09:28,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:09:28,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-03-11 00:09:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-03-11 00:09:28,141 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 00:09:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-03-11 00:09:28,144 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-03-11 00:09:28,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:28,144 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-03-11 00:09:28,145 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 00:09:28,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-03-11 00:09:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:09:28,147 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:28,147 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 00:09:28,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-03-11 00:09:28,364 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:28,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:28,364 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-03-11 00:09:28,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:28,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576813109] [2021-03-11 00:09:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:28,400 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 00:09:28,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576813109] [2021-03-11 00:09:28,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783262792] [2021-03-11 00:09:28,400 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 00:09:28,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:09:28,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:28,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:09:28,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:28,510 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 00:09:28,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:28,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:09:28,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502965555] [2021-03-11 00:09:28,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:09:28,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:28,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:09:28,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:09:28,511 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 00:09:28,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:28,681 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-03-11 00:09:28,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:09:28,681 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 00:09:28,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:28,685 INFO L225 Difference]: With dead ends: 1649 [2021-03-11 00:09:28,685 INFO L226 Difference]: Without dead ends: 1637 [2021-03-11 00:09:28,685 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:09:28,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-03-11 00:09:28,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-03-11 00:09:28,703 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 00:09:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-03-11 00:09:28,706 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-03-11 00:09:28,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:28,706 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-03-11 00:09:28,706 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 00:09:28,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-03-11 00:09:28,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:28,708 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:28,709 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 00:09:28,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-03-11 00:09:28,909 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:28,909 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-03-11 00:09:28,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:28,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899756368] [2021-03-11 00:09:28,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:29,292 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-03-11 00:09:29,471 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-11 00:09:29,620 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-11 00:09:29,716 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 00:09:29,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899756368] [2021-03-11 00:09:29,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060105559] [2021-03-11 00:09:29,716 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 00:09:29,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:09:29,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:29,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:09:29,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:30,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:30,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:30,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:30,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:30,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:09:30,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:30,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:30,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:30,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:30,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:09:30,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:30,724 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-03-11 00:09:30,724 INFO L628 ElimStorePlain]: treesize reduction 114, result has 53.8 percent of original size [2021-03-11 00:09:30,724 INFO L518 ElimStorePlain]: Eliminatee A vanished before elimination [2021-03-11 00:09:30,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:30,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:30,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:09:30,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:30,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:30,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:30,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 00:09:30,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:30,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:30,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:30,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:09:30,792 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:30,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:30,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:09:30,836 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-03-11 00:09:30,889 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 00:09:30,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:30,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:09:30,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677968894] [2021-03-11 00:09:30,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:09:30,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:30,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:09:30,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:09:30,890 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 00:09:31,257 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-03-11 00:09:31,855 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-03-11 00:09:32,136 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-03-11 00:09:32,265 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-03-11 00:09:32,561 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2021-03-11 00:09:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:32,782 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-03-11 00:09:32,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:09:32,782 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 00:09:32,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:32,785 INFO L225 Difference]: With dead ends: 1517 [2021-03-11 00:09:32,785 INFO L226 Difference]: Without dead ends: 1502 [2021-03-11 00:09:32,786 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 2554.2ms TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:09:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-03-11 00:09:32,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-03-11 00:09:32,802 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 00:09:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-03-11 00:09:32,805 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-03-11 00:09:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:32,805 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-03-11 00:09:32,805 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 00:09:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-03-11 00:09:32,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:32,807 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:32,807 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 00:09:33,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-11 00:09:33,011 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:33,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:33,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-03-11 00:09:33,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:33,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096708219] [2021-03-11 00:09:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:33,391 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-03-11 00:09:33,566 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-11 00:09:33,715 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-11 00:09:33,846 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 00:09:33,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096708219] [2021-03-11 00:09:33,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984456699] [2021-03-11 00:09:33,846 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 00:09:33,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:09:33,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:33,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:09:33,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:34,355 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-11 00:09:34,403 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_14, v_prenex_16]} [2021-03-11 00:09:34,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,409 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 00:09:34,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,548 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:09:34,548 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-03-11 00:09:34,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:09:34,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:09:34,571 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:34,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,619 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:34,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:34,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:09:34,662 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-03-11 00:09:34,735 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 00:09:34,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:34,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:09:34,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940852592] [2021-03-11 00:09:34,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:09:34,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:34,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:09:34,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:09:34,736 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 00:09:35,461 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-03-11 00:09:35,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:35,824 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-03-11 00:09:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:09:35,824 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 00:09:35,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:35,827 INFO L225 Difference]: With dead ends: 1495 [2021-03-11 00:09:35,827 INFO L226 Difference]: Without dead ends: 1480 [2021-03-11 00:09:35,828 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1819.1ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:09:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-03-11 00:09:35,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-03-11 00:09:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-03-11 00:09:35,848 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-03-11 00:09:35,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:35,848 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-03-11 00:09:35,848 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 00:09:35,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-03-11 00:09:35,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:35,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:35,851 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 00:09:36,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:36,051 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:36,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:36,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-03-11 00:09:36,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:36,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122773873] [2021-03-11 00:09:36,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:36,417 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-03-11 00:09:36,691 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-03-11 00:09:36,844 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-03-11 00:09:36,998 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 00:09:36,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122773873] [2021-03-11 00:09:36,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738822872] [2021-03-11 00:09:36,999 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 00:09:37,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:09:37,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:37,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:09:37,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:37,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,752 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 00:09:37,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:37,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,765 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 00:09:37,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:37,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,778 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 00:09:37,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:37,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:09:37,791 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:37,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,807 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 00:09:37,808 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:37,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,820 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 00:09:37,821 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:37,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,834 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 00:09:37,835 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:37,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,847 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 00:09:37,848 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:37,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,861 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 00:09:37,862 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:37,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,876 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 00:09:37,876 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:37,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:09:37,888 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:37,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,901 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 00:09:37,902 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:37,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,917 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 00:09:37,918 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:37,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:09:37,929 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:37,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:37,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:37,936 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 00:09:37,937 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:37,966 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-03-11 00:09:37,969 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 00:09:37,969 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:09:38,008 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 00:09:38,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:38,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:09:38,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178980031] [2021-03-11 00:09:38,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:09:38,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:38,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:09:38,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:09:38,011 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 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 00:09:39,533 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-03-11 00:09:39,937 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 42 [2021-03-11 00:09:40,337 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-03-11 00:09:40,887 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-03-11 00:09:41,052 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-11 00:09:41,194 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-03-11 00:09:41,364 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-11 00:09:41,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:41,382 INFO L93 Difference]: Finished difference Result 1660 states and 5351 transitions. [2021-03-11 00:09:41,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:09:41,383 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 00:09:41,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:41,386 INFO L225 Difference]: With dead ends: 1660 [2021-03-11 00:09:41,386 INFO L226 Difference]: Without dead ends: 1645 [2021-03-11 00:09:41,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 3683.2ms TimeCoverageRelationStatistics Valid=391, Invalid=1961, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:09:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-03-11 00:09:41,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1180. [2021-03-11 00:09:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-03-11 00:09:41,407 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-03-11 00:09:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:41,407 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-03-11 00:09:41,407 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 00:09:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-03-11 00:09:41,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:41,409 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:41,410 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 00:09:41,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-03-11 00:09:41,610 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:41,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:41,611 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-03-11 00:09:41,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:41,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635178151] [2021-03-11 00:09:41,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:41,956 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 39 [2021-03-11 00:09:42,187 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-03-11 00:09:42,426 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-03-11 00:09:42,606 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-03-11 00:09:42,746 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2021-03-11 00:09:42,787 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 00:09:42,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635178151] [2021-03-11 00:09:42,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160774862] [2021-03-11 00:09:42,788 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 00:09:42,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:09:42,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:42,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:09:42,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:43,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:43,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:43,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:09:43,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:43,169 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:43,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:09:43,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:43,185 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:43,186 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 28 treesize of output 20 [2021-03-11 00:09:43,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:43,199 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:43,199 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 00:09:43,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:43,214 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:43,215 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 00:09:43,216 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:43,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:43,232 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 28 treesize of output 24 [2021-03-11 00:09:43,245 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:43,257 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:43,257 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 31 treesize of output 19 [2021-03-11 00:09:43,258 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:43,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:43,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:09:43,273 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:43,285 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:43,286 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 00:09:43,287 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:43,298 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:43,298 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 00:09:43,299 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:43,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:43,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:09:43,318 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:43,331 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:43,332 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 00:09:43,333 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:43,346 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:43,346 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 36 treesize of output 22 [2021-03-11 00:09:43,348 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:43,364 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:43,364 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 00:09:43,366 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:43,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:43,380 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 00:09:43,382 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:43,398 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:43,398 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 00:09:43,399 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:43,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:43,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:09:43,479 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-03-11 00:09:43,720 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 00:09:43,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:43,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:09:43,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699152299] [2021-03-11 00:09:43,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:09:43,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:43,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:09:43,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:09:43,722 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 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 00:09:44,365 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-03-11 00:09:44,585 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-03-11 00:09:44,745 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-03-11 00:09:44,916 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2021-03-11 00:09:45,063 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-03-11 00:09:45,356 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-11 00:09:45,532 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-03-11 00:09:45,760 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2021-03-11 00:09:45,928 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-03-11 00:09:46,153 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2021-03-11 00:09:46,355 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-03-11 00:09:46,988 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-03-11 00:09:47,299 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 33 [2021-03-11 00:09:47,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:47,443 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-03-11 00:09:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:09:47,444 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 00:09:47,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:47,448 INFO L225 Difference]: With dead ends: 1843 [2021-03-11 00:09:47,448 INFO L226 Difference]: Without dead ends: 1828 [2021-03-11 00:09:47,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 4209.5ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:09:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-03-11 00:09:47,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-03-11 00:09:47,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:47,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-03-11 00:09:47,469 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-03-11 00:09:47,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:47,469 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-03-11 00:09:47,469 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 00:09:47,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-03-11 00:09:47,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:47,471 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:47,471 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 00:09:47,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:47,671 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:47,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:47,672 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-03-11 00:09:47,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:47,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950277525] [2021-03-11 00:09:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:47,930 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-03-11 00:09:48,047 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-03-11 00:09:48,230 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-03-11 00:09:48,480 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 00:09:48,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950277525] [2021-03-11 00:09:48,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626354488] [2021-03-11 00:09:48,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:48,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:09:48,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:49,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,224 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 45 treesize of output 16 [2021-03-11 00:09:49,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,237 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 38 treesize of output 16 [2021-03-11 00:09:49,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,249 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 45 treesize of output 19 [2021-03-11 00:09:49,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,270 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 36 treesize of output 16 [2021-03-11 00:09:49,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,284 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 38 treesize of output 16 [2021-03-11 00:09:49,285 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,298 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 27 treesize of output 7 [2021-03-11 00:09:49,300 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-03-11 00:09:49,312 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,324 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 00:09:49,325 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,338 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 45 treesize of output 19 [2021-03-11 00:09:49,339 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,350 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 13 [2021-03-11 00:09:49,351 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 16 [2021-03-11 00:09:49,363 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,373 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 43 treesize of output 19 [2021-03-11 00:09:49,374 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 13 [2021-03-11 00:09:49,386 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,401 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 47 treesize of output 13 [2021-03-11 00:09:49,402 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,413 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 19 [2021-03-11 00:09:49,414 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:49,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:49,421 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 00:09:49,422 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,459 INFO L628 ElimStorePlain]: treesize reduction 34, result has 49.3 percent of original size [2021-03-11 00:09:49,461 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 00:09:49,461 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:809, output treesize:21 [2021-03-11 00:09:49,496 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 00:09:49,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:49,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:09:49,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661506402] [2021-03-11 00:09:49,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:09:49,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:49,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:09:49,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:09:49,497 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 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 00:09:50,879 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 53 [2021-03-11 00:09:51,099 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 47 [2021-03-11 00:09:51,320 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 42 [2021-03-11 00:09:51,710 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-03-11 00:09:52,324 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-11 00:09:52,843 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-03-11 00:09:53,022 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-11 00:09:53,173 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-03-11 00:09:53,361 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-11 00:09:53,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:53,377 INFO L93 Difference]: Finished difference Result 1879 states and 5994 transitions. [2021-03-11 00:09:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-11 00:09:53,377 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 00:09:53,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:53,381 INFO L225 Difference]: With dead ends: 1879 [2021-03-11 00:09:53,381 INFO L226 Difference]: Without dead ends: 1864 [2021-03-11 00:09:53,382 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 4030.4ms TimeCoverageRelationStatistics Valid=468, Invalid=2082, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:09:53,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-03-11 00:09:53,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1206. [2021-03-11 00:09:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:53,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-03-11 00:09:53,404 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-03-11 00:09:53,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:53,404 INFO L480 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-03-11 00:09:53,404 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 00:09:53,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-03-11 00:09:53,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:53,407 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:53,407 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 00:09:53,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-03-11 00:09:53,608 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:53,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:53,608 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-03-11 00:09:53,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:53,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593691128] [2021-03-11 00:09:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:54,253 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 00:09:54,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593691128] [2021-03-11 00:09:54,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769423926] [2021-03-11 00:09:54,254 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 00:09:54,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:09:54,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:54,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:09:54,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:55,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,170 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:09:55,170 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 00:09:55,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,214 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:09:55,214 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 00:09:55,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,264 INFO L354 Elim1Store]: treesize reduction 11, result has 62.1 percent of original size [2021-03-11 00:09:55,264 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 36 [2021-03-11 00:09:55,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:55,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 41 [2021-03-11 00:09:55,321 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,360 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:09:55,360 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 45 treesize of output 28 [2021-03-11 00:09:55,362 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,410 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:09:55,410 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 43 treesize of output 28 [2021-03-11 00:09:55,412 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,437 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:09:55,437 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 43 treesize of output 1 [2021-03-11 00:09:55,438 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,462 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:09:55,462 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 43 treesize of output 1 [2021-03-11 00:09:55,463 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,498 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:09:55,499 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 26 [2021-03-11 00:09:55,505 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,542 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:09:55,542 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 00:09:55,550 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,574 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:09:55,574 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 00:09:55,575 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,610 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:09:55,611 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 00:09:55,613 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,647 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:09:55,647 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 36 treesize of output 25 [2021-03-11 00:09:55,650 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,672 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:09:55,672 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 00:09:55,673 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,696 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:09:55,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:09:55,697 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,714 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:09:55,714 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 00:09:55,715 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,881 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2021-03-11 00:09:55,881 INFO L628 ElimStorePlain]: treesize reduction 210, result has 43.1 percent of original size [2021-03-11 00:09:55,886 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 00:09:55,887 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:180 [2021-03-11 00:09:56,027 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-11 00:09:56,122 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 00:09:56,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:56,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-03-11 00:09:56,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250519487] [2021-03-11 00:09:56,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:09:56,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:56,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:09:56,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:09:56,124 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 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 00:09:57,129 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2021-03-11 00:09:57,401 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-03-11 00:09:57,980 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-03-11 00:09:58,150 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-03-11 00:09:58,616 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 47 [2021-03-11 00:09:58,795 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2021-03-11 00:09:59,175 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-03-11 00:09:59,320 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-11 00:09:59,671 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2021-03-11 00:09:59,834 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-03-11 00:10:00,014 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-03-11 00:10:00,408 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-03-11 00:10:00,811 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-03-11 00:10:01,070 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-03-11 00:10:01,397 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-03-11 00:10:01,666 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-03-11 00:10:01,842 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-03-11 00:10:01,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:01,994 INFO L93 Difference]: Finished difference Result 2467 states and 7615 transitions. [2021-03-11 00:10:01,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:10:01,995 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 00:10:01,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:02,000 INFO L225 Difference]: With dead ends: 2467 [2021-03-11 00:10:02,000 INFO L226 Difference]: Without dead ends: 2422 [2021-03-11 00:10:02,001 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 5859.0ms TimeCoverageRelationStatistics Valid=531, Invalid=3129, Unknown=0, NotChecked=0, Total=3660 [2021-03-11 00:10:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-03-11 00:10:02,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1381. [2021-03-11 00:10:02,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.318840579710145) internal successors, (4580), 1380 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4580 transitions. [2021-03-11 00:10:02,031 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4580 transitions. Word has length 26 [2021-03-11 00:10:02,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:02,031 INFO L480 AbstractCegarLoop]: Abstraction has 1381 states and 4580 transitions. [2021-03-11 00:10:02,032 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 00:10:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4580 transitions. [2021-03-11 00:10:02,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:02,034 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:02,034 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, 1, 1] [2021-03-11 00:10:02,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-03-11 00:10:02,235 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:02,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:02,239 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-03-11 00:10:02,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:02,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808991215] [2021-03-11 00:10:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:02,451 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-11 00:10:02,562 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-11 00:10:02,829 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 00:10:02,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808991215] [2021-03-11 00:10:02,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875137607] [2021-03-11 00:10:02,830 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) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:02,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:10:02,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:03,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:03,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:03,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:03,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:10:03,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:03,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:03,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:03,739 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:10:03,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:03,903 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-03-11 00:10:03,903 INFO L628 ElimStorePlain]: treesize reduction 93, result has 59.6 percent of original size [2021-03-11 00:10:03,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:03,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:03,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:03,917 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:03,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:03,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:03,924 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 00:10:03,926 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:03,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:03,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:03,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:03,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:10:03,989 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:04,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:04,039 INFO L518 ElimStorePlain]: Eliminatee v_prenex_23 vanished before elimination [2021-03-11 00:10:04,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:10:04,043 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-03-11 00:10:04,106 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 00:10:04,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:04,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:10:04,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571600197] [2021-03-11 00:10:04,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:10:04,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:04,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:10:04,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:10:04,107 INFO L87 Difference]: Start difference. First operand 1381 states and 4580 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 00:10:04,546 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28 [2021-03-11 00:10:04,921 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-03-11 00:10:05,297 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-03-11 00:10:05,560 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-03-11 00:10:05,954 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 75 [2021-03-11 00:10:06,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:06,162 INFO L93 Difference]: Finished difference Result 1801 states and 5845 transitions. [2021-03-11 00:10:06,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:10:06,163 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 00:10:06,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:06,167 INFO L225 Difference]: With dead ends: 1801 [2021-03-11 00:10:06,167 INFO L226 Difference]: Without dead ends: 1786 [2021-03-11 00:10:06,168 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2679.5ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:10:06,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-03-11 00:10:06,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1398. [2021-03-11 00:10:06,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.3149606299212597) internal successors, (4631), 1397 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4631 transitions. [2021-03-11 00:10:06,193 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4631 transitions. Word has length 26 [2021-03-11 00:10:06,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:06,194 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4631 transitions. [2021-03-11 00:10:06,194 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 00:10:06,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4631 transitions. [2021-03-11 00:10:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:06,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:06,197 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 00:10:06,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-03-11 00:10:06,408 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:06,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:06,409 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-03-11 00:10:06,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:06,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209913595] [2021-03-11 00:10:06,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:06,635 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-03-11 00:10:06,761 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-11 00:10:06,891 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-11 00:10:07,097 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 00:10:07,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209913595] [2021-03-11 00:10:07,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879291651] [2021-03-11 00:10:07,097 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 00:10:07,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:10:07,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:07,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:10:07,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:07,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,448 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:10:07,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:07,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:07,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,482 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:10:07,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 30 [2021-03-11 00:10:07,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:07,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:07,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,509 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:10:07,509 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:10:07,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:07,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:07,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,545 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:10:07,546 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 27 [2021-03-11 00:10:07,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:07,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:07,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,570 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:10:07,571 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:07,579 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:07,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,595 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:10:07,596 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:10:07,597 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:07,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,613 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:10:07,613 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 22 [2021-03-11 00:10:07,614 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:07,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,633 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:10:07,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:10:07,634 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:07,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:07,659 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2021-03-11 00:10:07,664 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:07,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:07,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,681 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:10:07,681 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:07,682 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:07,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,711 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-03-11 00:10:07,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-03-11 00:10:07,713 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:07,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:07,738 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2021-03-11 00:10:07,740 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:07,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:07,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,770 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:10:07,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-03-11 00:10:07,773 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:07,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:07,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,806 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-03-11 00:10:07,806 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-03-11 00:10:07,808 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:07,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:07,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:07,831 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-03-11 00:10:07,840 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:07,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:07,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:07,853 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:10:07,853 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:10:07,854 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:07,975 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:10:07,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:07,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:10:07,979 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:777, output treesize:249 [2021-03-11 00:10:08,129 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:10:08,373 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-11 00:10:08,513 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 00:10:08,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:08,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:10:08,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847237932] [2021-03-11 00:10:08,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:10:08,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:08,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:10:08,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:10:08,514 INFO L87 Difference]: Start difference. First operand 1398 states and 4631 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 00:10:09,307 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-03-11 00:10:09,462 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2021-03-11 00:10:09,630 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-03-11 00:10:09,889 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-03-11 00:10:10,148 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2021-03-11 00:10:10,461 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 61 [2021-03-11 00:10:10,631 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-11 00:10:11,014 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-03-11 00:10:11,230 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-03-11 00:10:11,473 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-03-11 00:10:11,629 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:10:11,998 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-11 00:10:12,372 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-03-11 00:10:12,899 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-03-11 00:10:13,269 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2021-03-11 00:10:13,954 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2021-03-11 00:10:14,507 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 40 [2021-03-11 00:10:14,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:14,632 INFO L93 Difference]: Finished difference Result 2032 states and 6448 transitions. [2021-03-11 00:10:14,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:10:14,633 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 00:10:14,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:14,638 INFO L225 Difference]: With dead ends: 2032 [2021-03-11 00:10:14,638 INFO L226 Difference]: Without dead ends: 2017 [2021-03-11 00:10:14,638 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 6120.0ms TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:10:14,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-03-11 00:10:14,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1420. [2021-03-11 00:10:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1419 states have (on average 3.320648343904158) internal successors, (4712), 1419 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 4712 transitions. [2021-03-11 00:10:14,668 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 4712 transitions. Word has length 26 [2021-03-11 00:10:14,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:14,668 INFO L480 AbstractCegarLoop]: Abstraction has 1420 states and 4712 transitions. [2021-03-11 00:10:14,669 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 00:10:14,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 4712 transitions. [2021-03-11 00:10:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:14,672 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:14,672 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 00:10:14,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-03-11 00:10:14,872 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:14,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-03-11 00:10:14,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:14,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373968454] [2021-03-11 00:10:14,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:15,213 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-03-11 00:10:15,328 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-03-11 00:10:15,475 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 00:10:15,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373968454] [2021-03-11 00:10:15,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979682711] [2021-03-11 00:10:15,476 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 00:10:15,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:10:15,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:15,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:10:15,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:16,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:16,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:16,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:10:16,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:16,548 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-03-11 00:10:16,549 INFO L628 ElimStorePlain]: treesize reduction 98, result has 60.6 percent of original size [2021-03-11 00:10:16,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:16,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:16,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:16,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:10:16,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:16,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:16,566 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 00:10:16,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:16,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:16,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:16,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:16,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:10:16,655 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:16,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:16,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:16,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:16,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:10:16,723 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:16,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:16,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:10:16,781 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-03-11 00:10:16,846 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 00:10:16,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:16,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:10:16,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557287497] [2021-03-11 00:10:16,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:10:16,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:16,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:10:16,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:10:16,847 INFO L87 Difference]: Start difference. First operand 1420 states and 4712 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 00:10:17,110 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 31 [2021-03-11 00:10:17,315 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2021-03-11 00:10:17,466 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 28 [2021-03-11 00:10:17,764 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-03-11 00:10:17,958 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-03-11 00:10:18,293 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-03-11 00:10:18,558 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2021-03-11 00:10:19,056 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 54 [2021-03-11 00:10:19,450 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-03-11 00:10:19,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:19,539 INFO L93 Difference]: Finished difference Result 1935 states and 6256 transitions. [2021-03-11 00:10:19,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:10:19,540 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 00:10:19,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:19,545 INFO L225 Difference]: With dead ends: 1935 [2021-03-11 00:10:19,545 INFO L226 Difference]: Without dead ends: 1920 [2021-03-11 00:10:19,545 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 3251.3ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:10:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-03-11 00:10:19,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1429. [2021-03-11 00:10:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.3249299719887957) internal successors, (4748), 1428 states have internal predecessors, (4748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:19,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4748 transitions. [2021-03-11 00:10:19,575 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4748 transitions. Word has length 26 [2021-03-11 00:10:19,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:19,575 INFO L480 AbstractCegarLoop]: Abstraction has 1429 states and 4748 transitions. [2021-03-11 00:10:19,575 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 00:10:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4748 transitions. [2021-03-11 00:10:19,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:19,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:19,578 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, 1, 1] [2021-03-11 00:10:19,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:19,779 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:19,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:19,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-03-11 00:10:19,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:19,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224697876] [2021-03-11 00:10:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:20,069 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-03-11 00:10:20,189 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-11 00:10:20,441 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 00:10:20,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224697876] [2021-03-11 00:10:20,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942423539] [2021-03-11 00:10:20,442 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 00:10:20,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:10:20,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:20,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:10:20,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:20,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:20,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:20,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:20,956 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:10:20,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:20,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:20,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:20,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:20,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:10:20,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:20,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:20,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:20,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:20,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:10:20,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:20,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:20,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,000 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:10:21,001 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:21,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:21,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:10:21,012 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:21,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:21,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:10:21,022 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:21,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:21,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 19 [2021-03-11 00:10:21,031 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:21,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:21,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,042 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:21,043 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:21,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:21,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:10:21,055 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:21,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:21,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:10:21,065 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:21,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:21,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:10:21,076 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:21,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:21,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 19 [2021-03-11 00:10:21,085 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:21,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:21,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:10:21,096 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:21,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:21,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:10:21,104 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:21,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:21,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 36 treesize of output 19 [2021-03-11 00:10:21,111 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:21,200 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-11 00:10:21,202 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 00:10:21,203 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-11 00:10:21,276 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 00:10:21,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:21,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:10:21,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095798959] [2021-03-11 00:10:21,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:10:21,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:21,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:10:21,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:10:21,277 INFO L87 Difference]: Start difference. First operand 1429 states and 4748 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 00:10:21,668 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-03-11 00:10:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:22,194 INFO L93 Difference]: Finished difference Result 1734 states and 5693 transitions. [2021-03-11 00:10:22,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:10:22,195 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 00:10:22,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:22,199 INFO L225 Difference]: With dead ends: 1734 [2021-03-11 00:10:22,199 INFO L226 Difference]: Without dead ends: 1719 [2021-03-11 00:10:22,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1467.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:10:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-03-11 00:10:22,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1438. [2021-03-11 00:10:22,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.329157967988866) internal successors, (4784), 1437 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4784 transitions. [2021-03-11 00:10:22,225 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4784 transitions. Word has length 26 [2021-03-11 00:10:22,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:22,225 INFO L480 AbstractCegarLoop]: Abstraction has 1438 states and 4784 transitions. [2021-03-11 00:10:22,226 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 00:10:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4784 transitions. [2021-03-11 00:10:22,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:22,229 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:22,229 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 00:10:22,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-03-11 00:10:22,429 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:22,430 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-03-11 00:10:22,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:22,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602512044] [2021-03-11 00:10:22,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:22,876 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 00:10:22,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602512044] [2021-03-11 00:10:22,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750728244] [2021-03-11 00:10:22,877 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 00:10:22,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:10:22,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:22,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:10:22,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:23,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:23,396 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:23,396 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 00:10:23,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:23,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:23,411 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:23,411 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 33 treesize of output 19 [2021-03-11 00:10:23,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:23,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:23,429 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:23,429 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 00:10:23,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:23,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:23,444 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:23,444 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 00:10:23,445 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:23,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:23,458 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:23,459 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 28 treesize of output 16 [2021-03-11 00:10:23,460 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:23,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:23,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:23,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:10:23,491 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:23,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:23,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:23,508 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 28 treesize of output 24 [2021-03-11 00:10:23,514 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:23,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:23,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:23,532 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 00:10:23,536 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:23,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:23,549 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:23,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:10:23,551 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:23,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:23,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:23,566 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 00:10:23,572 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:23,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:23,585 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:23,586 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 33 treesize of output 19 [2021-03-11 00:10:23,587 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:23,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:23,601 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:23,601 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 00:10:23,602 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:23,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:23,619 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:23,620 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 00:10:23,622 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:23,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:23,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:23,639 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 00:10:23,640 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:23,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:23,654 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:23,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:10:23,655 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:23,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:23,664 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:23,664 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 31 treesize of output 19 [2021-03-11 00:10:23,665 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:23,772 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:10:23,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:23,780 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 00:10:23,780 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-03-11 00:10:24,042 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 00:10:24,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:24,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:10:24,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776800495] [2021-03-11 00:10:24,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:10:24,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:24,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:10:24,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:10:24,044 INFO L87 Difference]: Start difference. First operand 1438 states and 4784 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 00:10:24,340 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 27 [2021-03-11 00:10:24,738 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 39 [2021-03-11 00:10:25,051 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-03-11 00:10:25,380 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-11 00:10:25,722 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-03-11 00:10:26,021 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-03-11 00:10:26,159 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-03-11 00:10:26,469 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2021-03-11 00:10:26,737 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-11 00:10:27,050 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2021-03-11 00:10:27,482 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2021-03-11 00:10:28,017 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2021-03-11 00:10:28,175 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-11 00:10:28,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:28,402 INFO L93 Difference]: Finished difference Result 2377 states and 7644 transitions. [2021-03-11 00:10:28,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:10:28,403 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 00:10:28,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:28,408 INFO L225 Difference]: With dead ends: 2377 [2021-03-11 00:10:28,408 INFO L226 Difference]: Without dead ends: 2347 [2021-03-11 00:10:28,409 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 4113.6ms TimeCoverageRelationStatistics Valid=381, Invalid=1689, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:10:28,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-03-11 00:10:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1438. [2021-03-11 00:10:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.329157967988866) internal successors, (4784), 1437 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4784 transitions. [2021-03-11 00:10:28,442 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4784 transitions. Word has length 26 [2021-03-11 00:10:28,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:28,443 INFO L480 AbstractCegarLoop]: Abstraction has 1438 states and 4784 transitions. [2021-03-11 00:10:28,443 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 00:10:28,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4784 transitions. [2021-03-11 00:10:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:28,446 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:28,446 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 00:10:28,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-03-11 00:10:28,647 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:28,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:28,647 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-03-11 00:10:28,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:28,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321305587] [2021-03-11 00:10:28,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:28,860 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-11 00:10:29,048 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-11 00:10:29,216 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-11 00:10:29,339 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-11 00:10:29,454 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 00:10:29,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321305587] [2021-03-11 00:10:29,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782061498] [2021-03-11 00:10:29,455 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 00:10:29,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:10:29,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:29,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:10:29,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:29,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:29,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:29,847 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 16 treesize of output 18 [2021-03-11 00:10:29,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:29,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:29,866 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:29,866 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 00:10:29,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:29,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:29,885 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:29,885 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 00:10:29,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:29,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:29,900 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:29,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:10:29,901 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:29,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:29,920 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:29,920 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 00:10:29,922 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:29,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:29,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:29,941 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 28 treesize of output 24 [2021-03-11 00:10:29,948 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:29,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:29,963 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:29,964 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 00:10:29,965 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:29,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:29,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:29,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:10:29,987 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:29,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:30,003 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:30,004 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 00:10:30,005 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:30,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:30,019 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:30,019 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 28 treesize of output 16 [2021-03-11 00:10:30,020 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:30,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:30,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:30,040 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 33 treesize of output 27 [2021-03-11 00:10:30,044 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:30,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:30,060 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:30,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:10:30,062 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:30,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:30,078 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:30,079 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 36 treesize of output 22 [2021-03-11 00:10:30,080 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:30,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:30,100 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:30,100 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 00:10:30,103 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:30,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:30,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:30,121 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 00:10:30,123 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:30,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:30,133 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:30,133 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 28 treesize of output 16 [2021-03-11 00:10:30,134 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:30,236 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:10:30,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:30,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:10:30,239 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-03-11 00:10:30,508 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 00:10:30,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:30,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:10:30,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875995841] [2021-03-11 00:10:30,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:10:30,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:30,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:10:30,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:10:30,510 INFO L87 Difference]: Start difference. First operand 1438 states and 4784 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 00:10:31,378 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-03-11 00:10:31,540 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-03-11 00:10:31,896 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2021-03-11 00:10:32,092 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-03-11 00:10:32,255 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-03-11 00:10:32,541 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-03-11 00:10:32,995 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-03-11 00:10:33,238 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-03-11 00:10:33,483 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-03-11 00:10:33,864 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-03-11 00:10:34,133 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2021-03-11 00:10:34,428 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 32 [2021-03-11 00:10:34,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:34,588 INFO L93 Difference]: Finished difference Result 2013 states and 6563 transitions. [2021-03-11 00:10:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:10:34,588 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 00:10:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:34,592 INFO L225 Difference]: With dead ends: 2013 [2021-03-11 00:10:34,593 INFO L226 Difference]: Without dead ends: 1998 [2021-03-11 00:10:34,593 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 4457.9ms TimeCoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:10:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-03-11 00:10:34,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1438. [2021-03-11 00:10:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.329157967988866) internal successors, (4784), 1437 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:34,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4784 transitions. [2021-03-11 00:10:34,620 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4784 transitions. Word has length 26 [2021-03-11 00:10:34,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:34,620 INFO L480 AbstractCegarLoop]: Abstraction has 1438 states and 4784 transitions. [2021-03-11 00:10:34,621 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 00:10:34,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4784 transitions. [2021-03-11 00:10:34,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:34,623 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:34,623 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 00:10:34,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-03-11 00:10:34,824 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:34,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:34,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-03-11 00:10:34,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:34,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322525800] [2021-03-11 00:10:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:35,225 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-03-11 00:10:35,491 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 00:10:35,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322525800] [2021-03-11 00:10:35,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992522398] [2021-03-11 00:10:35,491 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 00:10:35,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:10:35,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:35,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:10:35,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:36,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,292 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 35 treesize of output 19 [2021-03-11 00:10:36,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:36,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,306 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 00:10:36,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:36,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,323 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 00:10:36,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:36,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,339 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 39 treesize of output 19 [2021-03-11 00:10:36,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:36,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,354 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 00:10:36,355 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:36,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,368 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 00:10:36,369 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:36,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:10:36,384 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:36,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,397 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 41 treesize of output 13 [2021-03-11 00:10:36,398 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:36,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,411 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 28 treesize of output 13 [2021-03-11 00:10:36,412 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:36,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,424 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 37 treesize of output 19 [2021-03-11 00:10:36,425 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:36,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,437 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 00:10:36,437 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:36,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,451 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 00:10:36,452 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:36,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,465 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 39 treesize of output 13 [2021-03-11 00:10:36,467 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:36,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,477 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 00:10:36,478 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:36,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:36,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:36,484 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 00:10:36,485 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:36,517 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-03-11 00:10:36,519 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 00:10:36,519 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:10:36,551 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 00:10:36,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:36,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-03-11 00:10:36,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112534090] [2021-03-11 00:10:36,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:10:36,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:36,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:10:36,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:10:36,552 INFO L87 Difference]: Start difference. First operand 1438 states and 4784 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:37,122 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-03-11 00:10:37,590 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-11 00:10:37,855 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-03-11 00:10:38,203 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-03-11 00:10:38,618 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-03-11 00:10:39,022 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-03-11 00:10:39,223 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-03-11 00:10:39,442 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-11 00:10:39,571 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:10:39,847 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2021-03-11 00:10:40,420 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-03-11 00:10:40,589 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-03-11 00:10:41,087 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-11 00:10:41,268 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-03-11 00:10:41,588 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-03-11 00:10:41,800 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-03-11 00:10:42,043 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-03-11 00:10:42,201 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-11 00:10:42,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:42,600 INFO L93 Difference]: Finished difference Result 3246 states and 10037 transitions. [2021-03-11 00:10:42,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:10:42,601 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:42,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:42,609 INFO L225 Difference]: With dead ends: 3246 [2021-03-11 00:10:42,609 INFO L226 Difference]: Without dead ends: 3201 [2021-03-11 00:10:42,609 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 5866.9ms TimeCoverageRelationStatistics Valid=659, Invalid=3247, Unknown=0, NotChecked=0, Total=3906 [2021-03-11 00:10:42,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-03-11 00:10:42,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 1453. [2021-03-11 00:10:42,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.34297520661157) internal successors, (4854), 1452 states have internal predecessors, (4854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 4854 transitions. [2021-03-11 00:10:42,648 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 4854 transitions. Word has length 26 [2021-03-11 00:10:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:42,649 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 4854 transitions. [2021-03-11 00:10:42,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:42,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 4854 transitions. [2021-03-11 00:10:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:42,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:42,652 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 00:10:42,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-03-11 00:10:42,853 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:42,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:42,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-03-11 00:10:42,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:42,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743292896] [2021-03-11 00:10:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:43,252 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-03-11 00:10:43,552 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 00:10:43,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743292896] [2021-03-11 00:10:43,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870823645] [2021-03-11 00:10:43,553 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 00:10:43,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:10:43,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:43,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:10:43,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:44,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:44,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,378 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 00:10:44,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:44,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:44,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,392 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 00:10:44,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:44,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:44,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:10:44,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:44,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:44,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,422 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 00:10:44,423 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:44,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:44,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,437 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 00:10:44,438 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:44,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:44,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,452 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 00:10:44,454 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:44,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:44,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,480 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 00:10:44,481 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:44,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:44,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,495 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 00:10:44,496 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:44,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:44,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,511 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 00:10:44,512 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:44,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:44,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,527 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 00:10:44,529 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:44,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:44,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,542 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 00:10:44,544 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:44,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:44,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,558 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 00:10:44,559 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:44,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:44,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,571 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 00:10:44,572 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:44,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:44,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,585 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 00:10:44,587 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:44,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:44,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:44,595 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 00:10:44,596 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:44,635 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-03-11 00:10:44,637 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 00:10:44,638 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:10:44,696 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 00:10:44,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:44,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-03-11 00:10:44,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131437548] [2021-03-11 00:10:44,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:10:44,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:44,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:10:44,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:10:44,698 INFO L87 Difference]: Start difference. First operand 1453 states and 4854 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:45,412 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-03-11 00:10:45,599 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2021-03-11 00:10:45,809 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-11 00:10:45,962 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-03-11 00:10:46,272 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2021-03-11 00:10:46,429 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2021-03-11 00:10:46,681 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-03-11 00:10:47,145 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2021-03-11 00:10:47,354 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:10:47,511 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-03-11 00:10:47,736 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-03-11 00:10:48,046 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:10:48,317 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2021-03-11 00:10:48,737 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-03-11 00:10:49,351 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-03-11 00:10:49,529 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-03-11 00:10:49,776 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-03-11 00:10:50,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:50,089 INFO L93 Difference]: Finished difference Result 3018 states and 9515 transitions. [2021-03-11 00:10:50,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:10:50,090 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:50,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:50,097 INFO L225 Difference]: With dead ends: 3018 [2021-03-11 00:10:50,097 INFO L226 Difference]: Without dead ends: 2973 [2021-03-11 00:10:50,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 5436.9ms TimeCoverageRelationStatistics Valid=591, Invalid=2601, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:10:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2021-03-11 00:10:50,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 1456. [2021-03-11 00:10:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.3450171821305843) internal successors, (4867), 1455 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:50,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 4867 transitions. [2021-03-11 00:10:50,136 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 4867 transitions. Word has length 26 [2021-03-11 00:10:50,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:50,136 INFO L480 AbstractCegarLoop]: Abstraction has 1456 states and 4867 transitions. [2021-03-11 00:10:50,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 4867 transitions. [2021-03-11 00:10:50,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:50,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:50,139 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 00:10:50,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-03-11 00:10:50,340 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:50,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:50,340 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-03-11 00:10:50,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:50,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68153132] [2021-03-11 00:10:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:50,835 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-11 00:10:51,146 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 00:10:51,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68153132] [2021-03-11 00:10:51,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434173439] [2021-03-11 00:10:51,146 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 00:10:51,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:10:51,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:51,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:10:51,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:51,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:51,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:51,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:51,893 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 00:10:51,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:51,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:51,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:51,957 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:10:51,957 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 00:10:51,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:51,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:51,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,002 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:10:52,003 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 41 treesize of output 33 [2021-03-11 00:10:52,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,038 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:10:52,038 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 00:10:52,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,076 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:10:52,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:10:52,079 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,119 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:10:52,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:10:52,122 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,159 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-03-11 00:10:52,160 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 00:10:52,162 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,200 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:10:52,201 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 28 [2021-03-11 00:10:52,202 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,228 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:10:52,228 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 00:10:52,229 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,255 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:10:52,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:10:52,256 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,294 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-03-11 00:10:52,295 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 25 [2021-03-11 00:10:52,297 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,324 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:10:52,324 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 00:10:52,325 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,351 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:10:52,352 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 00:10:52,353 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,389 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-03-11 00:10:52,389 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 00:10:52,392 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,426 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-03-11 00:10:52,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 25 [2021-03-11 00:10:52,429 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:52,445 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:10:52,445 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 00:10:52,446 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,606 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-03-11 00:10:52,606 INFO L628 ElimStorePlain]: treesize reduction 171, result has 38.7 percent of original size [2021-03-11 00:10:52,608 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 00:10:52,609 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:90 [2021-03-11 00:10:52,749 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 00:10:52,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:52,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:10:52,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048051782] [2021-03-11 00:10:52,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:10:52,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:52,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:10:52,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:10:52,750 INFO L87 Difference]: Start difference. First operand 1456 states and 4867 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 00:10:53,219 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2021-03-11 00:10:53,504 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-11 00:10:53,709 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-03-11 00:10:53,915 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 44 [2021-03-11 00:10:54,182 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-03-11 00:10:54,361 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-03-11 00:10:54,650 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 70 [2021-03-11 00:10:54,851 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-03-11 00:10:55,032 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-11 00:10:55,276 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-03-11 00:10:55,482 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-11 00:10:55,978 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2021-03-11 00:10:56,248 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-03-11 00:10:56,434 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-11 00:10:56,710 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2021-03-11 00:10:57,079 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2021-03-11 00:10:57,205 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-11 00:10:57,464 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 70 [2021-03-11 00:10:58,047 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-03-11 00:10:58,367 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-03-11 00:10:59,100 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-03-11 00:10:59,530 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2021-03-11 00:10:59,748 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-03-11 00:11:00,179 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2021-03-11 00:11:00,570 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 42 [2021-03-11 00:11:00,829 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-11 00:11:01,125 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-11 00:11:01,410 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-03-11 00:11:01,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:01,707 INFO L93 Difference]: Finished difference Result 3484 states and 10843 transitions. [2021-03-11 00:11:01,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-11 00:11:01,708 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 00:11:01,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:01,717 INFO L225 Difference]: With dead ends: 3484 [2021-03-11 00:11:01,717 INFO L226 Difference]: Without dead ends: 3424 [2021-03-11 00:11:01,717 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 8421.3ms TimeCoverageRelationStatistics Valid=813, Invalid=3347, Unknown=0, NotChecked=0, Total=4160 [2021-03-11 00:11:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2021-03-11 00:11:01,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 1469. [2021-03-11 00:11:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1468 states have (on average 3.356267029972752) internal successors, (4927), 1468 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 4927 transitions. [2021-03-11 00:11:01,760 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 4927 transitions. Word has length 26 [2021-03-11 00:11:01,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:01,760 INFO L480 AbstractCegarLoop]: Abstraction has 1469 states and 4927 transitions. [2021-03-11 00:11:01,760 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 00:11:01,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 4927 transitions. [2021-03-11 00:11:01,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:01,763 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:01,763 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 00:11:01,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:01,964 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:01,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:01,964 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 13 times [2021-03-11 00:11:01,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:01,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681491614] [2021-03-11 00:11:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:02,279 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-03-11 00:11:02,448 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-03-11 00:11:02,688 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-11 00:11:02,886 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-11 00:11:03,006 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-11 00:11:03,061 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 00:11:03,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681491614] [2021-03-11 00:11:03,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649827438] [2021-03-11 00:11:03,061 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 00:11:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:03,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:11:03,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:03,769 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-11 00:11:03,858 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_38], 3=[v_prenex_40, v_prenex_36]} [2021-03-11 00:11:03,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:03,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:03,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:03,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:11:03,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:03,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:03,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:03,881 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:11:03,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:04,104 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-03-11 00:11:04,105 INFO L628 ElimStorePlain]: treesize reduction 114, result has 55.3 percent of original size [2021-03-11 00:11:04,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:04,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:04,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:04,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:11:04,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:04,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:04,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:04,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:11:04,129 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:04,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:04,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:04,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:11:04,206 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:04,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:04,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:04,273 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 00:11:04,275 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:04,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:04,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:11:04,331 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:293, output treesize:61 [2021-03-11 00:11:04,428 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 00:11:04,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:04,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:11:04,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684118573] [2021-03-11 00:11:04,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:11:04,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:04,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:11:04,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:11:04,429 INFO L87 Difference]: Start difference. First operand 1469 states and 4927 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 00:11:05,178 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-03-11 00:11:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:05,805 INFO L93 Difference]: Finished difference Result 1822 states and 6002 transitions. [2021-03-11 00:11:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:11:05,806 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 00:11:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:05,810 INFO L225 Difference]: With dead ends: 1822 [2021-03-11 00:11:05,810 INFO L226 Difference]: Without dead ends: 1807 [2021-03-11 00:11:05,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 2493.2ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:11:05,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-03-11 00:11:05,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1461. [2021-03-11 00:11:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 3.3602739726027395) internal successors, (4906), 1460 states have internal predecessors, (4906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:05,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4906 transitions. [2021-03-11 00:11:05,838 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4906 transitions. Word has length 26 [2021-03-11 00:11:05,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:05,838 INFO L480 AbstractCegarLoop]: Abstraction has 1461 states and 4906 transitions. [2021-03-11 00:11:05,838 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 00:11:05,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4906 transitions. [2021-03-11 00:11:05,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:05,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:05,841 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 00:11:06,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:06,042 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:06,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:06,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 14 times [2021-03-11 00:11:06,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:06,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872766237] [2021-03-11 00:11:06,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:06,286 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-11 00:11:06,457 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-03-11 00:11:06,752 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 00:11:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872766237] [2021-03-11 00:11:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565114043] [2021-03-11 00:11:06,752 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 00:11:06,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:11:06,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:06,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:11:06,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:07,672 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-03-11 00:11:07,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 28 [2021-03-11 00:11:07,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:07,719 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-03-11 00:11:07,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 39 [2021-03-11 00:11:07,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:07,997 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-11 00:11:07,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:08,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:08,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-03-11 00:11:08,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:08,084 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-03-11 00:11:08,084 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 00:11:08,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:08,624 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-03-11 00:11:08,624 INFO L628 ElimStorePlain]: treesize reduction 18, result has 94.8 percent of original size [2021-03-11 00:11:08,667 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:11:08,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:11:08,670 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:08,709 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:11:08,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:11:08,715 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:08,959 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:11:08,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:08,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:08,992 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 00:11:09,004 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:09,040 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:11:09,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:11:09,046 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:09,276 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-11 00:11:09,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:09,333 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 00:11:09,334 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:857 [2021-03-11 00:11:10,185 WARN L205 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 106 [2021-03-11 00:11:10,708 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-03-11 00:11:10,895 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 00:11:10,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:10,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-11 00:11:10,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644062410] [2021-03-11 00:11:10,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:11:10,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:10,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:11:10,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:11:10,896 INFO L87 Difference]: Start difference. First operand 1461 states and 4906 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 00:11:11,214 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 22 [2021-03-11 00:11:11,460 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 28 [2021-03-11 00:11:12,128 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 45 [2021-03-11 00:11:12,395 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:11:13,035 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 48 [2021-03-11 00:11:13,436 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-03-11 00:11:14,205 WARN L205 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 108 [2021-03-11 00:11:14,845 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 49 [2021-03-11 00:11:15,596 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 56 [2021-03-11 00:11:16,519 WARN L205 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 75 [2021-03-11 00:11:17,141 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 58 [2021-03-11 00:11:17,597 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2021-03-11 00:11:18,217 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-03-11 00:11:18,911 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-03-11 00:11:19,895 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 75 [2021-03-11 00:11:20,860 WARN L205 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 123 [2021-03-11 00:11:21,500 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 57 [2021-03-11 00:11:22,247 WARN L205 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 90 [2021-03-11 00:11:22,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:22,405 INFO L93 Difference]: Finished difference Result 2104 states and 6764 transitions. [2021-03-11 00:11:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:11:22,406 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 00:11:22,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:22,410 INFO L225 Difference]: With dead ends: 2104 [2021-03-11 00:11:22,410 INFO L226 Difference]: Without dead ends: 2089 [2021-03-11 00:11:22,411 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 12368.1ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:11:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-03-11 00:11:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1465. [2021-03-11 00:11:22,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.365437158469945) internal successors, (4927), 1464 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:22,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4927 transitions. [2021-03-11 00:11:22,441 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4927 transitions. Word has length 26 [2021-03-11 00:11:22,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:22,441 INFO L480 AbstractCegarLoop]: Abstraction has 1465 states and 4927 transitions. [2021-03-11 00:11:22,442 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 00:11:22,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4927 transitions. [2021-03-11 00:11:22,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:22,444 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:22,445 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 00:11:22,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable919,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:22,659 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:22,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:22,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1741432748, now seen corresponding path program 15 times [2021-03-11 00:11:22,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:22,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280764298] [2021-03-11 00:11:22,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:22,958 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-11 00:11:23,129 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-03-11 00:11:23,275 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-03-11 00:11:23,436 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 00:11:23,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280764298] [2021-03-11 00:11:23,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671013551] [2021-03-11 00:11:23,437 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 00:11:23,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:11:23,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:23,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:11:23,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:24,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,082 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:24,082 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:11:24,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:24,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:24,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-03-11 00:11:24,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:24,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,129 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:24,129 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:11:24,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:24,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,151 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:24,151 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:11:24,153 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:24,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,173 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:24,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:11:24,174 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:24,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:24,199 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-03-11 00:11:24,206 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:24,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:24,231 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-03-11 00:11:24,233 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:24,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,260 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:11:24,260 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-03-11 00:11:24,263 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:24,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,289 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:11:24,289 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-03-11 00:11:24,292 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:24,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:24,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-03-11 00:11:24,319 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:24,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,340 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:24,340 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:11:24,341 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:24,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,361 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:24,361 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:11:24,362 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:24,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:24,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-03-11 00:11:24,383 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:24,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,397 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:24,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-03-11 00:11:24,398 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:24,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,412 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:24,413 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:11:24,414 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:24,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:24,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:24,425 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:11:24,425 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-03-11 00:11:24,427 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:24,538 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:11:24,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:24,548 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 00:11:24,549 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:825, output treesize:196 [2021-03-11 00:11:24,787 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-11 00:11:24,942 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 00:11:24,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:24,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:11:24,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71762111] [2021-03-11 00:11:24,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:11:24,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:24,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:11:24,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:11:24,943 INFO L87 Difference]: Start difference. First operand 1465 states and 4927 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 00:11:25,478 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-03-11 00:11:25,763 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-03-11 00:11:25,940 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-11 00:11:26,329 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-03-11 00:11:26,826 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-03-11 00:11:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:26,887 INFO L93 Difference]: Finished difference Result 2031 states and 6671 transitions. [2021-03-11 00:11:26,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:11:26,888 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 00:11:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:26,891 INFO L225 Difference]: With dead ends: 2031 [2021-03-11 00:11:26,892 INFO L226 Difference]: Without dead ends: 2016 [2021-03-11 00:11:26,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2552.8ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:11:26,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-03-11 00:11:26,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1462. [2021-03-11 00:11:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.36208076659822) internal successors, (4912), 1461 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:26,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 4912 transitions. [2021-03-11 00:11:26,919 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 4912 transitions. Word has length 26 [2021-03-11 00:11:26,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:26,920 INFO L480 AbstractCegarLoop]: Abstraction has 1462 states and 4912 transitions. [2021-03-11 00:11:26,920 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 00:11:26,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 4912 transitions. [2021-03-11 00:11:26,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:26,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:26,923 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 00:11:27,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable999,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:27,135 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:27,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:27,135 INFO L82 PathProgramCache]: Analyzing trace with hash 576217266, now seen corresponding path program 16 times [2021-03-11 00:11:27,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:27,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009075560] [2021-03-11 00:11:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:27,365 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-03-11 00:11:27,500 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-11 00:11:27,662 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-11 00:11:27,821 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-11 00:11:27,984 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-11 00:11:28,023 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 00:11:28,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009075560] [2021-03-11 00:11:28,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3749262] [2021-03-11 00:11:28,023 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 00:11:28,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:11:28,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:28,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:11:28,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:28,557 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:11:28,961 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-03-11 00:11:29,056 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_55], 2=[A, v_prenex_56]} [2021-03-11 00:11:29,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:29,063 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 00:11:29,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:29,257 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:11:29,258 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-03-11 00:11:29,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:29,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:29,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:11:29,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:29,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:29,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:29,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:29,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:29,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:11:29,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:29,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:29,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:29,357 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 00:11:29,359 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:29,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:29,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:11:29,423 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-03-11 00:11:29,513 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 00:11:29,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:29,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:11:29,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46901075] [2021-03-11 00:11:29,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:11:29,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:29,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:11:29,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:11:29,515 INFO L87 Difference]: Start difference. First operand 1462 states and 4912 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 00:11:29,979 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2021-03-11 00:11:30,104 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-11 00:11:30,578 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2021-03-11 00:11:31,143 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-03-11 00:11:31,491 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-03-11 00:11:31,803 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:11:32,501 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-03-11 00:11:33,024 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-03-11 00:11:33,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:33,525 INFO L93 Difference]: Finished difference Result 2123 states and 6934 transitions. [2021-03-11 00:11:33,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:11:33,526 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 00:11:33,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:33,530 INFO L225 Difference]: With dead ends: 2123 [2021-03-11 00:11:33,531 INFO L226 Difference]: Without dead ends: 2108 [2021-03-11 00:11:33,531 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 4564.5ms TimeCoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:11:33,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-03-11 00:11:33,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1465. [2021-03-11 00:11:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.3633879781420766) internal successors, (4924), 1464 states have internal predecessors, (4924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4924 transitions. [2021-03-11 00:11:33,571 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4924 transitions. Word has length 26 [2021-03-11 00:11:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:33,571 INFO L480 AbstractCegarLoop]: Abstraction has 1465 states and 4924 transitions. [2021-03-11 00:11:33,571 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 00:11:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4924 transitions. [2021-03-11 00:11:33,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:33,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:33,574 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 00:11:33,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:33,779 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:33,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:33,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1041315514, now seen corresponding path program 17 times [2021-03-11 00:11:33,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:33,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392156654] [2021-03-11 00:11:33,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:33,996 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-03-11 00:11:34,237 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-03-11 00:11:34,531 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 00:11:34,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392156654] [2021-03-11 00:11:34,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721531990] [2021-03-11 00:11:34,531 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 00:11:34,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:11:34,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:34,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:11:34,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:35,140 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:11:35,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:35,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:35,236 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 00:11:35,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:35,441 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-11 00:11:35,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:35,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:35,462 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:11:35,463 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 21 treesize of output 17 [2021-03-11 00:11:35,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:35,669 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-11 00:11:35,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:35,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:35,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:35,689 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 00:11:35,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:35,866 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-11 00:11:35,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:35,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:35,887 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:11:35,887 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 00:11:35,890 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:36,064 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-03-11 00:11:36,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:36,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:36,084 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:11:36,084 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 00:11:36,087 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:36,253 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-11 00:11:36,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:36,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:36,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:36,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:11:36,276 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:36,451 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-11 00:11:36,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:36,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:36,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:36,468 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 16 treesize of output 18 [2021-03-11 00:11:36,475 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:36,630 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:11:36,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:36,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:36,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:36,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:11:36,652 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:36,802 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-11 00:11:36,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:36,811 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 00:11:36,812 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:309, output treesize:174 [2021-03-11 00:11:36,956 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:11:37,128 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 00:11:37,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:37,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:11:37,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577315761] [2021-03-11 00:11:37,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:11:37,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:37,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:11:37,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:11:37,129 INFO L87 Difference]: Start difference. First operand 1465 states and 4924 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 00:11:37,283 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 28 [2021-03-11 00:11:37,445 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 28 [2021-03-11 00:11:37,865 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 38 [2021-03-11 00:11:38,099 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2021-03-11 00:11:38,334 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-11 00:11:38,658 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-03-11 00:11:38,968 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-03-11 00:11:39,369 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2021-03-11 00:11:39,771 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-03-11 00:11:40,085 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:11:40,779 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-03-11 00:11:41,712 WARN L205 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2021-03-11 00:11:41,883 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:11:42,188 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-11 00:11:42,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:42,372 INFO L93 Difference]: Finished difference Result 2065 states and 6709 transitions. [2021-03-11 00:11:42,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:11:42,373 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 00:11:42,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:42,378 INFO L225 Difference]: With dead ends: 2065 [2021-03-11 00:11:42,378 INFO L226 Difference]: Without dead ends: 2035 [2021-03-11 00:11:42,378 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 5635.6ms TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:11:42,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-03-11 00:11:42,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1459. [2021-03-11 00:11:42,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 3.3607681755829906) internal successors, (4900), 1458 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:42,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 4900 transitions. [2021-03-11 00:11:42,407 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 4900 transitions. Word has length 26 [2021-03-11 00:11:42,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:42,407 INFO L480 AbstractCegarLoop]: Abstraction has 1459 states and 4900 transitions. [2021-03-11 00:11:42,407 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 00:11:42,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 4900 transitions. [2021-03-11 00:11:42,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:42,410 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:42,410 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 00:11:42,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1086 [2021-03-11 00:11:42,610 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:42,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:42,611 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 18 times [2021-03-11 00:11:42,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:42,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100464945] [2021-03-11 00:11:42,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:42,847 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-11 00:11:42,973 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-11 00:11:43,124 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-03-11 00:11:43,387 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 00:11:43,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100464945] [2021-03-11 00:11:43,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277001938] [2021-03-11 00:11:43,387 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 00:11:43,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:11:43,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:43,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:11:43,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:44,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:11:44,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:11:44,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:11:44,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:11:44,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:11:44,067 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:11:44,080 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:11:44,095 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:11:44,111 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,124 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:11:44,125 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-03-11 00:11:44,139 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:11:44,154 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:11:44,167 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,180 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 33 treesize of output 19 [2021-03-11 00:11:44,182 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:11:44,195 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:44,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:44,201 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:11:44,202 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:44,333 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-11 00:11:44,333 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-11 00:11:44,336 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 00:11:44,336 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-11 00:11:44,428 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 00:11:44,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:44,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:11:44,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007458547] [2021-03-11 00:11:44,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:11:44,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:44,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:11:44,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:11:44,429 INFO L87 Difference]: Start difference. First operand 1459 states and 4900 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 00:11:44,973 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-03-11 00:11:45,112 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2021-03-11 00:11:45,507 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 33 [2021-03-11 00:11:45,744 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-03-11 00:11:46,215 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-11 00:11:46,475 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-11 00:11:46,642 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-11 00:11:46,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:46,948 INFO L93 Difference]: Finished difference Result 1950 states and 6361 transitions. [2021-03-11 00:11:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:11:46,950 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 00:11:46,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:46,954 INFO L225 Difference]: With dead ends: 1950 [2021-03-11 00:11:46,954 INFO L226 Difference]: Without dead ends: 1925 [2021-03-11 00:11:46,954 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2888.4ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:11:46,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-03-11 00:11:46,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1494. [2021-03-11 00:11:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.3563295378432687) internal successors, (5011), 1493 states have internal predecessors, (5011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:47,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 5011 transitions. [2021-03-11 00:11:47,001 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 5011 transitions. Word has length 26 [2021-03-11 00:11:47,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:47,001 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 5011 transitions. [2021-03-11 00:11:47,002 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 00:11:47,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 5011 transitions. [2021-03-11 00:11:47,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:47,005 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:47,005 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 00:11:47,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1101 [2021-03-11 00:11:47,223 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:47,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:47,223 INFO L82 PathProgramCache]: Analyzing trace with hash -31506310, now seen corresponding path program 19 times [2021-03-11 00:11:47,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:47,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155216466] [2021-03-11 00:11:47,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:47,466 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-11 00:11:47,888 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 00:11:47,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155216466] [2021-03-11 00:11:47,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060179244] [2021-03-11 00:11:47,888 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 00:11:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:47,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:11:47,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:48,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:48,479 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 00:11:48,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,503 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:11:48,503 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 00:11:48,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:48,526 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 00:11:48,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,551 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:48,552 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 00:11:48,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:48,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:11:48,578 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,593 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:48,594 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 00:11:48,595 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,611 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:48,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:11:48,612 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,628 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:48,628 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 00:11:48,629 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:48,650 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 28 treesize of output 24 [2021-03-11 00:11:48,658 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:48,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:11:48,685 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,703 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:48,703 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 00:11:48,705 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,727 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:11:48,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:11:48,731 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,748 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:48,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:11:48,750 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,767 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:48,768 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 36 treesize of output 22 [2021-03-11 00:11:48,769 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,785 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:11:48,786 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 00:11:48,787 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,802 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:11:48,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:11:48,805 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,956 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:11:48,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:48,964 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 00:11:48,964 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:174 [2021-03-11 00:11:49,124 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:11:49,280 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:11:49,315 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 00:11:49,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:49,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:11:49,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777736480] [2021-03-11 00:11:49,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:11:49,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:49,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:11:49,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:11:49,316 INFO L87 Difference]: Start difference. First operand 1494 states and 5011 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 00:11:49,565 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 28 [2021-03-11 00:11:50,317 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-03-11 00:11:50,970 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-03-11 00:11:51,257 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:11:51,630 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:11:51,851 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-11 00:11:51,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:51,996 INFO L93 Difference]: Finished difference Result 2167 states and 7052 transitions. [2021-03-11 00:11:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:11:51,998 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 00:11:51,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:52,002 INFO L225 Difference]: With dead ends: 2167 [2021-03-11 00:11:52,003 INFO L226 Difference]: Without dead ends: 2142 [2021-03-11 00:11:52,003 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2988.0ms TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:11:52,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-03-11 00:11:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1497. [2021-03-11 00:11:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 3.356951871657754) internal successors, (5022), 1496 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 5022 transitions. [2021-03-11 00:11:52,035 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 5022 transitions. Word has length 26 [2021-03-11 00:11:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:52,035 INFO L480 AbstractCegarLoop]: Abstraction has 1497 states and 5022 transitions. [2021-03-11 00:11:52,035 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 00:11:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 5022 transitions. [2021-03-11 00:11:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:52,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:52,038 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 00:11:52,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1133 [2021-03-11 00:11:52,240 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:52,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 20 times [2021-03-11 00:11:52,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:52,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436542409] [2021-03-11 00:11:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:52,486 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-11 00:11:52,610 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-03-11 00:11:52,917 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 00:11:52,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436542409] [2021-03-11 00:11:52,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303286016] [2021-03-11 00:11:52,917 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 00:11:52,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:11:52,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:52,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:11:52,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:53,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:53,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:53,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:11:53,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:53,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:53,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:53,596 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 00:11:53,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:53,836 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:11:53,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:53,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:53,862 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:11:53,863 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 00:11:53,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:53,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:53,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:53,883 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 00:11:53,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:54,099 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-11 00:11:54,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:54,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:54,122 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:11:54,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:11:54,127 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:54,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:54,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:54,143 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 00:11:54,150 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:54,346 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-11 00:11:54,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:54,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:54,368 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:11:54,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:11:54,371 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:54,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:54,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:54,389 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 00:11:54,397 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:54,572 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:11:54,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:54,584 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 00:11:54,584 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:309, output treesize:174 [2021-03-11 00:11:54,753 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:11:54,926 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 00:11:54,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:54,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-11 00:11:54,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561571142] [2021-03-11 00:11:54,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:11:54,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:54,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:11:54,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:11:54,927 INFO L87 Difference]: Start difference. First operand 1497 states and 5022 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 00:11:55,492 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-11 00:11:56,044 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:11:56,392 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-11 00:11:56,631 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:11:56,947 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-11 00:11:57,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:57,079 INFO L93 Difference]: Finished difference Result 1676 states and 5533 transitions. [2021-03-11 00:11:57,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:11:57,080 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 00:11:57,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:57,084 INFO L225 Difference]: With dead ends: 1676 [2021-03-11 00:11:57,084 INFO L226 Difference]: Without dead ends: 1651 [2021-03-11 00:11:57,084 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2552.0ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:11:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-03-11 00:11:57,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1510. [2021-03-11 00:11:57,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.3631544068919816) internal successors, (5075), 1509 states have internal predecessors, (5075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:57,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5075 transitions. [2021-03-11 00:11:57,112 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5075 transitions. Word has length 26 [2021-03-11 00:11:57,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:57,112 INFO L480 AbstractCegarLoop]: Abstraction has 1510 states and 5075 transitions. [2021-03-11 00:11:57,112 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 00:11:57,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5075 transitions. [2021-03-11 00:11:57,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:57,115 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:57,115 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 00:11:57,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:57,331 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:57,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 21 times [2021-03-11 00:11:57,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:57,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993069081] [2021-03-11 00:11:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:57,693 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-03-11 00:11:57,885 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2021-03-11 00:11:58,171 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-03-11 00:11:58,300 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-11 00:11:58,424 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-11 00:11:58,477 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 00:11:58,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993069081] [2021-03-11 00:11:58,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357769434] [2021-03-11 00:11:58,477 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 00:11:58,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:11:58,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:58,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:11:58,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:58,851 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:11:59,194 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-11 00:11:59,590 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-03-11 00:11:59,709 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_85, v_prenex_84]} [2021-03-11 00:11:59,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:59,717 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 00:11:59,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:59,933 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:11:59,934 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-03-11 00:11:59,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:59,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:59,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:11:59,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:00,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:00,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:00,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:00,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:00,042 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:12:00,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:00,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:00,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:00,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:12:00,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:00,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:00,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:12:00,131 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-03-11 00:12:00,246 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 00:12:00,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:00,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:12:00,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204307778] [2021-03-11 00:12:00,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:12:00,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:00,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:12:00,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:12:00,248 INFO L87 Difference]: Start difference. First operand 1510 states and 5075 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 00:12:01,032 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:12:01,335 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-11 00:12:01,645 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:12:02,083 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-11 00:12:02,815 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2021-03-11 00:12:03,192 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-11 00:12:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:03,501 INFO L93 Difference]: Finished difference Result 2093 states and 6807 transitions. [2021-03-11 00:12:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:12:03,502 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 00:12:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:03,507 INFO L225 Difference]: With dead ends: 2093 [2021-03-11 00:12:03,507 INFO L226 Difference]: Without dead ends: 2048 [2021-03-11 00:12:03,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 4453.6ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:12:03,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-03-11 00:12:03,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1554. [2021-03-11 00:12:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 3.3708950418544754) internal successors, (5235), 1553 states have internal predecessors, (5235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 5235 transitions. [2021-03-11 00:12:03,551 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 5235 transitions. Word has length 26 [2021-03-11 00:12:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:03,552 INFO L480 AbstractCegarLoop]: Abstraction has 1554 states and 5235 transitions. [2021-03-11 00:12:03,552 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 00:12:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 5235 transitions. [2021-03-11 00:12:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:12:03,555 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:03,555 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 00:12:03,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1205 [2021-03-11 00:12:03,756 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:03,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:03,756 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 22 times [2021-03-11 00:12:03,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:03,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009623914] [2021-03-11 00:12:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:04,003 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-11 00:12:04,128 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2021-03-11 00:12:04,272 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-03-11 00:12:04,490 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 00:12:04,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009623914] [2021-03-11 00:12:04,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041656644] [2021-03-11 00:12:04,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:12:04,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:12:04,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:04,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:12:04,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:04,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:04,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:04,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:04,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:04,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:04,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-03-11 00:12:04,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:04,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:04,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:04,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:04,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,004 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:12:05,005 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:12:05,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:05,031 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-03-11 00:12:05,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,064 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:12:05,065 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:12:05,066 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,097 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:12:05,097 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-03-11 00:12:05,101 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,124 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:12:05,124 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:12:05,125 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:05,152 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-03-11 00:12:05,160 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,183 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:12:05,184 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:12:05,185 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,209 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:12:05,209 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:12:05,210 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:05,241 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-03-11 00:12:05,244 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,273 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:12:05,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-03-11 00:12:05,276 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,302 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:12:05,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:12:05,304 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,334 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:12:05,335 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-03-11 00:12:05,338 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:05,368 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-03-11 00:12:05,372 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,396 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:12:05,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-03-11 00:12:05,398 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,414 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:12:05,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:12:05,415 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,551 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:12:05,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:05,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:12:05,554 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-03-11 00:12:05,720 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:12:05,917 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 00:12:05,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:05,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:12:05,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780284537] [2021-03-11 00:12:05,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:12:05,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:05,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:12:05,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:12:05,918 INFO L87 Difference]: Start difference. First operand 1554 states and 5235 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 00:12:06,815 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-03-11 00:12:07,078 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-11 00:12:07,410 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 33 [2021-03-11 00:12:07,754 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-11 00:12:07,985 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-03-11 00:12:08,287 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-03-11 00:12:08,674 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-11 00:12:08,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:08,897 INFO L93 Difference]: Finished difference Result 2012 states and 6621 transitions. [2021-03-11 00:12:08,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:12:08,898 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 00:12:08,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:08,902 INFO L225 Difference]: With dead ends: 2012 [2021-03-11 00:12:08,902 INFO L226 Difference]: Without dead ends: 1993 [2021-03-11 00:12:08,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 3338.2ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:12:08,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-03-11 00:12:08,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1545. [2021-03-11 00:12:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3678756476683938) internal successors, (5200), 1544 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5200 transitions. [2021-03-11 00:12:08,932 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5200 transitions. Word has length 26 [2021-03-11 00:12:08,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:08,933 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 5200 transitions. [2021-03-11 00:12:08,933 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 00:12:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5200 transitions. [2021-03-11 00:12:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:12:08,936 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:08,936 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 00:12:09,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1215,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:09,136 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:09,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:09,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 23 times [2021-03-11 00:12:09,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:09,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626822043] [2021-03-11 00:12:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:09,655 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-11 00:12:09,782 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-11 00:12:09,925 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 00:12:09,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626822043] [2021-03-11 00:12:09,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589635210] [2021-03-11 00:12:09,925 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 00:12:09,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:12:09,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:09,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:12:09,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:10,362 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:12:10,583 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-11 00:12:10,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:10,958 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:12:10,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:12:10,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:10,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:10,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:10,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:12:11,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:11,625 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-03-11 00:12:11,626 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-03-11 00:12:11,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:11,672 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:11,672 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:12:11,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:11,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:11,722 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:11,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:12:11,726 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:12,008 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-11 00:12:12,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:12,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:12,052 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:12,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:12:12,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:12,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:12,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:12,085 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:12:12,093 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:12,652 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-03-11 00:12:12,652 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-03-11 00:12:12,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:12,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:12,683 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 16 treesize of output 26 [2021-03-11 00:12:12,694 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:12,721 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:12:12,721 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 21 treesize of output 21 [2021-03-11 00:12:12,724 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:12,965 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-11 00:12:12,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:12,997 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 00:12:12,997 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:361, output treesize:309 [2021-03-11 00:12:13,477 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-03-11 00:12:13,666 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 00:12:13,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:13,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:12:13,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873684372] [2021-03-11 00:12:13,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:12:13,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:13,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:12:13,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:12:13,668 INFO L87 Difference]: Start difference. First operand 1545 states and 5200 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 00:12:13,928 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 29 [2021-03-11 00:12:14,246 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-11 00:12:14,381 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2021-03-11 00:12:14,936 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-03-11 00:12:15,925 WARN L205 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2021-03-11 00:12:16,347 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:12:16,563 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-11 00:12:17,216 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-03-11 00:12:17,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:17,337 INFO L93 Difference]: Finished difference Result 2065 states and 6802 transitions. [2021-03-11 00:12:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:12:17,338 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 00:12:17,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:17,343 INFO L225 Difference]: With dead ends: 2065 [2021-03-11 00:12:17,343 INFO L226 Difference]: Without dead ends: 2040 [2021-03-11 00:12:17,343 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 4449.9ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:12:17,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-03-11 00:12:17,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1545. [2021-03-11 00:12:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3678756476683938) internal successors, (5200), 1544 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:17,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5200 transitions. [2021-03-11 00:12:17,373 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5200 transitions. Word has length 26 [2021-03-11 00:12:17,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:17,373 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 5200 transitions. [2021-03-11 00:12:17,373 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 00:12:17,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5200 transitions. [2021-03-11 00:12:17,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:12:17,376 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:17,376 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 00:12:17,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1240,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:17,577 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:17,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:17,577 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-03-11 00:12:17,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:17,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895979705] [2021-03-11 00:12:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:17,850 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-11 00:12:17,985 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-03-11 00:12:18,249 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 21 [2021-03-11 00:12:18,374 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-11 00:12:18,509 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 00:12:18,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895979705] [2021-03-11 00:12:18,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719314596] [2021-03-11 00:12:18,509 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 00:12:18,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:12:18,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:18,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:18,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:19,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,557 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 36 treesize of output 16 [2021-03-11 00:12:19,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:19,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,576 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 00:12:19,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:19,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,596 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 43 treesize of output 13 [2021-03-11 00:12:19,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:19,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,616 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 00:12:19,618 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:19,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,637 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 43 treesize of output 13 [2021-03-11 00:12:19,639 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:19,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,659 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 41 treesize of output 19 [2021-03-11 00:12:19,661 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:19,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,679 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 25 treesize of output 7 [2021-03-11 00:12:19,682 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:19,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,701 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 30 treesize of output 13 [2021-03-11 00:12:19,702 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:19,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,721 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 45 treesize of output 16 [2021-03-11 00:12:19,723 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:19,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,739 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 13 [2021-03-11 00:12:19,742 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:19,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,762 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 00:12:19,763 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:19,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,780 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 00:12:19,782 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:19,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,800 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 00:12:19,801 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:19,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,821 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 13 [2021-03-11 00:12:19,823 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:19,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,844 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 00:12:19,845 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:19,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:19,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:19,859 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 43 treesize of output 19 [2021-03-11 00:12:19,860 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:19,924 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-03-11 00:12:19,926 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 00:12:19,927 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-03-11 00:12:19,985 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 00:12:19,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:19,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:12:19,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573278638] [2021-03-11 00:12:19,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:12:19,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:19,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:12:19,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:12:19,986 INFO L87 Difference]: Start difference. First operand 1545 states and 5200 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 00:12:21,044 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2021-03-11 00:12:21,302 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2021-03-11 00:12:21,463 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2021-03-11 00:12:21,702 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-11 00:12:22,305 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-03-11 00:12:22,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:22,466 INFO L93 Difference]: Finished difference Result 1992 states and 6522 transitions. [2021-03-11 00:12:22,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:12:22,467 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 00:12:22,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:22,471 INFO L225 Difference]: With dead ends: 1992 [2021-03-11 00:12:22,471 INFO L226 Difference]: Without dead ends: 1966 [2021-03-11 00:12:22,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2888.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:12:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-03-11 00:12:22,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1549. [2021-03-11 00:12:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 3.3656330749354004) internal successors, (5210), 1548 states have internal predecessors, (5210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 5210 transitions. [2021-03-11 00:12:22,500 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 5210 transitions. Word has length 26 [2021-03-11 00:12:22,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:22,500 INFO L480 AbstractCegarLoop]: Abstraction has 1549 states and 5210 transitions. [2021-03-11 00:12:22,500 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 00:12:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 5210 transitions. [2021-03-11 00:12:22,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:12:22,503 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:22,503 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 00:12:22,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1300 [2021-03-11 00:12:22,704 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:22,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:22,704 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-03-11 00:12:22,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:22,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883641918] [2021-03-11 00:12:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:22,987 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-03-11 00:12:23,133 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-11 00:12:23,253 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-03-11 00:12:23,541 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 00:12:23,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883641918] [2021-03-11 00:12:23,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291865660] [2021-03-11 00:12:23,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:23,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:23,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:24,158 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-11 00:12:24,259 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_97, v_prenex_95], 5=[A, v_prenex_93]} [2021-03-11 00:12:24,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:24,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:24,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:24,273 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 23 treesize of output 13 [2021-03-11 00:12:24,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:24,478 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-11 00:12:24,479 INFO L628 ElimStorePlain]: treesize reduction 146, result has 43.6 percent of original size [2021-03-11 00:12:24,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:24,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:24,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:24,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:12:24,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:24,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:24,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:24,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:24,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:24,574 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 25 treesize of output 13 [2021-03-11 00:12:24,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:24,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:24,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:24,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:12:24,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:24,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:24,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:12:24,693 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:33 [2021-03-11 00:12:24,784 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 00:12:24,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:24,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:12:24,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460502097] [2021-03-11 00:12:24,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:12:24,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:24,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:12:24,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:12:24,785 INFO L87 Difference]: Start difference. First operand 1549 states and 5210 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 00:12:26,171 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 30 [2021-03-11 00:12:26,359 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 33 [2021-03-11 00:12:26,633 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2021-03-11 00:12:27,129 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2021-03-11 00:12:27,330 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 33 [2021-03-11 00:12:28,139 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-11 00:12:28,743 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:12:29,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:29,060 INFO L93 Difference]: Finished difference Result 2165 states and 7087 transitions. [2021-03-11 00:12:29,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:12:29,061 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 00:12:29,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:29,066 INFO L225 Difference]: With dead ends: 2165 [2021-03-11 00:12:29,066 INFO L226 Difference]: Without dead ends: 2150 [2021-03-11 00:12:29,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 4426.5ms TimeCoverageRelationStatistics Valid=441, Invalid=1815, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:12:29,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-03-11 00:12:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1549. [2021-03-11 00:12:29,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 3.3656330749354004) internal successors, (5210), 1548 states have internal predecessors, (5210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:29,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 5210 transitions. [2021-03-11 00:12:29,097 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 5210 transitions. Word has length 26 [2021-03-11 00:12:29,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:29,097 INFO L480 AbstractCegarLoop]: Abstraction has 1549 states and 5210 transitions. [2021-03-11 00:12:29,098 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 00:12:29,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 5210 transitions. [2021-03-11 00:12:29,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:12:29,100 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:29,101 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 00:12:29,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1414 [2021-03-11 00:12:29,301 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:29,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:29,301 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 24 times [2021-03-11 00:12:29,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:29,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246820710] [2021-03-11 00:12:29,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:29,599 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-03-11 00:12:29,801 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-03-11 00:12:29,978 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-11 00:12:30,148 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-03-11 00:12:30,296 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-11 00:12:30,380 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 00:12:30,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246820710] [2021-03-11 00:12:30,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986322805] [2021-03-11 00:12:30,380 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 00:12:30,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:12:30,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:30,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:12:30,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:30,780 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:12:31,223 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:12:31,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:31,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:12:31,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:32,252 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-03-11 00:12:32,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:32,301 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:32,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:12:32,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:32,566 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-03-11 00:12:32,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:32,609 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:12:32,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:12:32,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:32,840 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-03-11 00:12:32,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:32,867 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:32,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:12:32,872 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:33,007 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-11 00:12:33,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:33,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:33,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 [2021-03-11 00:12:33,030 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:33,264 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-11 00:12:33,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:33,301 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:12:33,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:12:33,304 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:33,555 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-11 00:12:33,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:33,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:33,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 35 [2021-03-11 00:12:33,590 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:33,851 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-11 00:12:33,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:33,892 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:33,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:12:33,896 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:34,149 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-11 00:12:34,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:34,172 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 00:12:34,172 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:349, output treesize:430 [2021-03-11 00:12:34,724 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-03-11 00:12:34,946 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:12:35,143 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:12:35,160 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 00:12:35,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:35,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:12:35,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763043660] [2021-03-11 00:12:35,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:12:35,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:35,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:12:35,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:12:35,161 INFO L87 Difference]: Start difference. First operand 1549 states and 5210 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 00:12:35,553 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 27 [2021-03-11 00:12:36,032 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-03-11 00:12:36,413 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2021-03-11 00:12:36,878 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-11 00:12:37,287 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 48 [2021-03-11 00:12:37,795 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-03-11 00:12:38,056 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-03-11 00:12:38,783 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-03-11 00:12:39,751 WARN L205 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-03-11 00:12:40,365 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 63 [2021-03-11 00:12:41,148 WARN L205 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-03-11 00:12:42,344 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-03-11 00:12:43,127 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-03-11 00:12:44,467 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-03-11 00:12:45,675 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2021-03-11 00:12:47,215 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2021-03-11 00:12:48,253 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-03-11 00:12:49,277 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-03-11 00:12:50,145 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2021-03-11 00:12:50,743 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2021-03-11 00:12:51,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:51,070 INFO L93 Difference]: Finished difference Result 2516 states and 7932 transitions. [2021-03-11 00:12:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:12:51,072 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 00:12:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:51,078 INFO L225 Difference]: With dead ends: 2516 [2021-03-11 00:12:51,078 INFO L226 Difference]: Without dead ends: 2452 [2021-03-11 00:12:51,078 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 16712.0ms TimeCoverageRelationStatistics Valid=411, Invalid=1941, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:12:51,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-03-11 00:12:51,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1584. [2021-03-11 00:12:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.370183196462413) internal successors, (5335), 1583 states have internal predecessors, (5335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:51,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5335 transitions. [2021-03-11 00:12:51,114 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5335 transitions. Word has length 26 [2021-03-11 00:12:51,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:51,114 INFO L480 AbstractCegarLoop]: Abstraction has 1584 states and 5335 transitions. [2021-03-11 00:12:51,114 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 00:12:51,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5335 transitions. [2021-03-11 00:12:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:12:51,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:51,117 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 00:12:51,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1428,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:51,318 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:51,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-03-11 00:12:51,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:51,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785635967] [2021-03-11 00:12:51,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:51,600 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-11 00:12:51,756 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-03-11 00:12:51,977 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2021-03-11 00:12:52,125 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-03-11 00:12:52,251 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-03-11 00:12:52,392 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 00:12:52,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785635967] [2021-03-11 00:12:52,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992618247] [2021-03-11 00:12:52,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:52,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:12:52,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:52,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:12:52,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:53,254 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-11 00:12:54,010 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_139], 5=[v_prenex_141, v_prenex_137]} [2021-03-11 00:12:54,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:54,070 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:54,070 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 21 treesize of output 25 [2021-03-11 00:12:54,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:54,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:54,133 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:54,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:12:54,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:54,568 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-11 00:12:54,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:54,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:54,621 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:12:54,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:12:54,625 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:54,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:54,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:54,661 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:12:54,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:55,059 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-11 00:12:55,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:55,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:55,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:55,119 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:12:55,119 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:12:55,122 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:55,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:55,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:55,160 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:12:55,172 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:55,521 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:12:55,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:55,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:55,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:55,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:55,580 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:55,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:12:55,586 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:55,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:55,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:55,634 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:55,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:12:55,638 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:55,908 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-11 00:12:55,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:55,934 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 00:12:55,935 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:393, output treesize:161 [2021-03-11 00:12:56,165 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-11 00:12:56,262 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 00:12:56,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:56,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:12:56,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633986926] [2021-03-11 00:12:56,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:12:56,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:56,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:12:56,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:12:56,263 INFO L87 Difference]: Start difference. First operand 1584 states and 5335 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 00:12:57,037 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2021-03-11 00:12:57,322 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2021-03-11 00:12:57,673 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 41 [2021-03-11 00:12:57,990 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2021-03-11 00:12:58,217 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 31 [2021-03-11 00:12:58,518 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2021-03-11 00:12:58,697 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 34 [2021-03-11 00:12:59,382 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-03-11 00:12:59,670 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-11 00:12:59,899 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-11 00:13:00,199 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-03-11 00:13:00,420 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-03-11 00:13:00,618 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2021-03-11 00:13:00,888 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2021-03-11 00:13:01,194 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-11 00:13:01,760 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-03-11 00:13:02,237 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-03-11 00:13:02,711 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-03-11 00:13:03,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:03,546 INFO L93 Difference]: Finished difference Result 2425 states and 7700 transitions. [2021-03-11 00:13:03,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:13:03,549 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 00:13:03,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:03,553 INFO L225 Difference]: With dead ends: 2425 [2021-03-11 00:13:03,554 INFO L226 Difference]: Without dead ends: 2381 [2021-03-11 00:13:03,554 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 7997.3ms TimeCoverageRelationStatistics Valid=486, Invalid=2376, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:13:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-03-11 00:13:03,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1591. [2021-03-11 00:13:03,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.3710691823899372) internal successors, (5360), 1590 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5360 transitions. [2021-03-11 00:13:03,588 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5360 transitions. Word has length 26 [2021-03-11 00:13:03,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:03,588 INFO L480 AbstractCegarLoop]: Abstraction has 1591 states and 5360 transitions. [2021-03-11 00:13:03,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 00:13:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5360 transitions. [2021-03-11 00:13:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:13:03,591 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:03,591 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 00:13:03,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1476 [2021-03-11 00:13:03,799 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:03,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:03,799 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-03-11 00:13:03,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:03,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678251963] [2021-03-11 00:13:03,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:04,169 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:13:04,300 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2021-03-11 00:13:04,435 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-11 00:13:04,584 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-11 00:13:04,722 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-11 00:13:04,860 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 00:13:04,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678251963] [2021-03-11 00:13:04,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679871892] [2021-03-11 00:13:04,861 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 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 00:13:04,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:13:04,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:04,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:13:04,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:05,830 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-11 00:13:05,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:05,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:05,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:05,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:05,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:05,956 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 00:13:05,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:05,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:05,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:05,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:05,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:05,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:05,982 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 28 treesize of output 13 [2021-03-11 00:13:05,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:05,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:05,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:05,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,007 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 00:13:06,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:06,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:06,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,032 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 00:13:06,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:06,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:06,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,053 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 00:13:06,056 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:06,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:06,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,075 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 13 [2021-03-11 00:13:06,077 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:06,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:06,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,100 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 7 [2021-03-11 00:13:06,104 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:06,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:06,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,127 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 00:13:06,129 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:06,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:06,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,152 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 00:13:06,153 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:06,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:06,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,175 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 16 [2021-03-11 00:13:06,177 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:06,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:06,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,198 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 00:13:06,200 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:06,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:06,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,221 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 13 [2021-03-11 00:13:06,224 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:06,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:06,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,245 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 32 treesize of output 16 [2021-03-11 00:13:06,248 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:06,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:06,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,269 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 00:13:06,271 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:06,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:06,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,291 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 00:13:06,293 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:06,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:06,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:06,303 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 35 treesize of output 13 [2021-03-11 00:13:06,306 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:06,427 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-11 00:13:06,427 INFO L628 ElimStorePlain]: treesize reduction 31, result has 65.6 percent of original size [2021-03-11 00:13:06,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:13:06,429 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:913, output treesize:59 [2021-03-11 00:13:06,778 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 00:13:06,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:06,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-11 00:13:06,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414416618] [2021-03-11 00:13:06,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:13:06,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:06,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:13:06,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:13:06,780 INFO L87 Difference]: Start difference. First operand 1591 states and 5360 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 00:13:07,177 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-11 00:13:07,451 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-11 00:13:07,733 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-11 00:13:07,942 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-03-11 00:13:08,275 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-11 00:13:08,542 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-03-11 00:13:08,696 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:13:08,936 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-11 00:13:09,160 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-11 00:13:09,756 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-11 00:13:10,043 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-11 00:13:10,374 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-03-11 00:13:10,703 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:13:11,316 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-03-11 00:13:11,630 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-03-11 00:13:12,025 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-03-11 00:13:12,393 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:13:12,778 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:13:13,416 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-03-11 00:13:13,819 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-11 00:13:14,323 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-03-11 00:13:15,092 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-03-11 00:13:15,742 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-03-11 00:13:16,167 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-03-11 00:13:16,738 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2021-03-11 00:13:17,027 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-03-11 00:13:17,309 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-11 00:13:17,453 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:13:17,660 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-11 00:13:17,928 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2021-03-11 00:13:18,245 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-11 00:13:18,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:18,309 INFO L93 Difference]: Finished difference Result 3601 states and 11187 transitions. [2021-03-11 00:13:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-11 00:13:18,311 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 00:13:18,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:18,318 INFO L225 Difference]: With dead ends: 3601 [2021-03-11 00:13:18,318 INFO L226 Difference]: Without dead ends: 3565 [2021-03-11 00:13:18,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 11258.8ms TimeCoverageRelationStatistics Valid=846, Invalid=4124, Unknown=0, NotChecked=0, Total=4970 [2021-03-11 00:13:18,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3565 states. [2021-03-11 00:13:18,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3565 to 1723. [2021-03-11 00:13:18,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 3.3792102206736354) internal successors, (5819), 1722 states have internal predecessors, (5819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 5819 transitions. [2021-03-11 00:13:18,363 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 5819 transitions. Word has length 26 [2021-03-11 00:13:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:18,363 INFO L480 AbstractCegarLoop]: Abstraction has 1723 states and 5819 transitions. [2021-03-11 00:13:18,363 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 00:13:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 5819 transitions. [2021-03-11 00:13:18,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:13:18,367 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:18,367 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 00:13:18,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1546,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:18,567 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:18,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:18,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1791604362, now seen corresponding path program 25 times [2021-03-11 00:13:18,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:18,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931752933] [2021-03-11 00:13:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:19,070 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2021-03-11 00:13:19,468 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-11 00:13:19,719 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-11 00:13:19,945 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-11 00:13:20,177 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-11 00:13:20,266 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 00:13:20,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931752933] [2021-03-11 00:13:20,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172528451] [2021-03-11 00:13:20,267 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:20,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:13:20,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:21,151 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:13:21,813 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-03-11 00:13:21,980 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_150, v_prenex_151], 3=[A, v_prenex_152]} [2021-03-11 00:13:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:21,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:21,996 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:13:21,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:22,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:22,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:13:22,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:22,354 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-11 00:13:22,355 INFO L628 ElimStorePlain]: treesize reduction 119, result has 50.4 percent of original size [2021-03-11 00:13:22,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:22,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:22,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:13:22,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:22,495 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:13:22,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:22,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:22,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:13:22,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:22,625 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:13:22,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:22,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:22,634 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 13 treesize of output 7 [2021-03-11 00:13:22,637 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:22,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:22,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:13:22,739 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:281, output treesize:56 [2021-03-11 00:13:22,901 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 00:13:22,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:22,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:13:22,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120429906] [2021-03-11 00:13:22,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:13:22,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:22,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:13:22,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:13:22,903 INFO L87 Difference]: Start difference. First operand 1723 states and 5819 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 00:13:23,233 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 28 [2021-03-11 00:13:23,631 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2021-03-11 00:13:24,153 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-03-11 00:13:24,940 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-03-11 00:13:25,496 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-11 00:13:25,820 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-11 00:13:26,563 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-03-11 00:13:27,036 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-03-11 00:13:27,907 WARN L205 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-03-11 00:13:29,098 WARN L205 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-03-11 00:13:29,905 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-03-11 00:13:30,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:30,474 INFO L93 Difference]: Finished difference Result 2316 states and 7537 transitions. [2021-03-11 00:13:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:13:30,475 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 00:13:30,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:30,480 INFO L225 Difference]: With dead ends: 2316 [2021-03-11 00:13:30,481 INFO L226 Difference]: Without dead ends: 2301 [2021-03-11 00:13:30,481 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 8576.4ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:13:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-03-11 00:13:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1730. [2021-03-11 00:13:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 3.3817235396182763) internal successors, (5847), 1729 states have internal predecessors, (5847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5847 transitions. [2021-03-11 00:13:30,516 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5847 transitions. Word has length 26 [2021-03-11 00:13:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:30,516 INFO L480 AbstractCegarLoop]: Abstraction has 1730 states and 5847 transitions. [2021-03-11 00:13:30,516 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 00:13:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5847 transitions. [2021-03-11 00:13:30,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:13:30,520 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:30,520 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 00:13:30,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1566 [2021-03-11 00:13:30,720 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:30,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:30,721 INFO L82 PathProgramCache]: Analyzing trace with hash 885830154, now seen corresponding path program 26 times [2021-03-11 00:13:30,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:30,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421122459] [2021-03-11 00:13:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:31,132 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-03-11 00:13:31,637 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-11 00:13:31,957 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-03-11 00:13:32,229 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-03-11 00:13:32,356 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-03-11 00:13:32,474 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 00:13:32,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421122459] [2021-03-11 00:13:32,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517404417] [2021-03-11 00:13:32,474 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 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 00:13:32,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:13:32,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:32,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:13:32,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:32,978 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:13:33,370 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-11 00:13:33,665 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-03-11 00:13:33,666 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 28 [2021-03-11 00:13:33,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:34,106 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-03-11 00:13:34,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:34,193 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:13:34,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:13:34,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:34,605 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-03-11 00:13:34,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:34,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:34,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-03-11 00:13:34,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:35,472 WARN L205 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 152 [2021-03-11 00:13:35,473 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.6 percent of original size [2021-03-11 00:13:35,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:35,532 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 00:13:35,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:35,923 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-03-11 00:13:35,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:35,993 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:13:35,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:13:36,004 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:36,412 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-03-11 00:13:36,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:36,478 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:13:36,478 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 00:13:36,489 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:36,872 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-03-11 00:13:36,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:36,953 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-03-11 00:13:36,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:13:36,967 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:37,704 WARN L205 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 130 [2021-03-11 00:13:37,705 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.2 percent of original size [2021-03-11 00:13:37,789 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-03-11 00:13:37,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 39 [2021-03-11 00:13:37,793 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:38,200 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-11 00:13:38,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:38,258 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 00:13:38,258 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:381, output treesize:745 [2021-03-11 00:13:39,613 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-03-11 00:13:40,489 WARN L205 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-03-11 00:13:40,781 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:13:40,822 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 00:13:40,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:40,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:13:40,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561589434] [2021-03-11 00:13:40,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:13:40,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:40,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:13:40,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:13:40,823 INFO L87 Difference]: Start difference. First operand 1730 states and 5847 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 00:13:41,250 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 30 [2021-03-11 00:13:41,684 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 34 [2021-03-11 00:13:41,896 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-03-11 00:13:42,239 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-03-11 00:13:42,645 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 38 [2021-03-11 00:13:42,927 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 44 [2021-03-11 00:13:43,382 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-03-11 00:13:43,565 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-11 00:13:43,982 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2021-03-11 00:13:45,053 WARN L205 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 55 [2021-03-11 00:13:45,628 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2021-03-11 00:13:46,088 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-03-11 00:13:46,310 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-11 00:13:47,280 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-11 00:13:48,072 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-03-11 00:13:49,439 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2021-03-11 00:13:50,568 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-03-11 00:13:51,718 WARN L205 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2021-03-11 00:13:53,016 WARN L205 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2021-03-11 00:13:54,153 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2021-03-11 00:13:55,573 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 128 DAG size of output: 114 [2021-03-11 00:13:57,238 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 135 DAG size of output: 111 [2021-03-11 00:13:58,323 WARN L205 SmtUtils]: Spent 897.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2021-03-11 00:13:59,120 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 42 [2021-03-11 00:13:59,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:59,342 INFO L93 Difference]: Finished difference Result 2958 states and 9371 transitions. [2021-03-11 00:13:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:13:59,344 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 00:13:59,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:59,349 INFO L225 Difference]: With dead ends: 2958 [2021-03-11 00:13:59,349 INFO L226 Difference]: Without dead ends: 2920 [2021-03-11 00:13:59,349 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 20799.8ms TimeCoverageRelationStatistics Valid=425, Invalid=1737, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:13:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-03-11 00:13:59,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 1734. [2021-03-11 00:13:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.385458742065782) internal successors, (5867), 1733 states have internal predecessors, (5867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:59,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5867 transitions. [2021-03-11 00:13:59,379 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5867 transitions. Word has length 26 [2021-03-11 00:13:59,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:59,379 INFO L480 AbstractCegarLoop]: Abstraction has 1734 states and 5867 transitions. [2021-03-11 00:13:59,379 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 00:13:59,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5867 transitions. [2021-03-11 00:13:59,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:13:59,382 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:59,382 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 00:13:59,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1578 [2021-03-11 00:13:59,582 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:59,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:59,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-03-11 00:13:59,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:59,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35089572] [2021-03-11 00:13:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:00,314 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 00:14:00,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35089572] [2021-03-11 00:14:00,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040643531] [2021-03-11 00:14:00,314 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 00:14:00,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:14:00,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:00,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:14:00,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:01,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,450 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 30 treesize of output 13 [2021-03-11 00:14:01,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:01,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,469 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 00:14:01,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:01,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,488 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-03-11 00:14:01,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:01,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,506 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 00:14:01,508 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:01,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,522 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 19 [2021-03-11 00:14:01,524 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:01,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:14:01,538 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:01,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,552 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 36 treesize of output 16 [2021-03-11 00:14:01,553 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:01,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,568 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 13 [2021-03-11 00:14:01,570 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:01,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-03-11 00:14:01,585 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:01,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,599 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 25 treesize of output 7 [2021-03-11 00:14:01,601 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:01,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,612 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 43 treesize of output 13 [2021-03-11 00:14:01,613 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:01,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,625 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 34 treesize of output 16 [2021-03-11 00:14:01,626 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:01,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,636 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 45 treesize of output 16 [2021-03-11 00:14:01,637 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:01,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,648 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 13 [2021-03-11 00:14:01,649 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:01,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,659 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 41 treesize of output 16 [2021-03-11 00:14:01,660 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:01,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:01,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:01,665 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 00:14:01,666 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:01,712 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-03-11 00:14:01,713 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 00:14:01,714 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-03-11 00:14:01,788 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 00:14:01,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:01,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:14:01,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59667169] [2021-03-11 00:14:01,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:14:01,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:01,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:14:01,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:14:01,789 INFO L87 Difference]: Start difference. First operand 1734 states and 5867 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 00:14:02,243 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-03-11 00:14:02,603 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-03-11 00:14:02,901 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-11 00:14:03,107 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-03-11 00:14:03,296 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2021-03-11 00:14:03,902 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-03-11 00:14:04,181 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-03-11 00:14:04,389 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-11 00:14:04,546 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-11 00:14:05,013 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-11 00:14:05,210 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-11 00:14:05,513 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-03-11 00:14:05,911 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-03-11 00:14:06,112 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-03-11 00:14:06,549 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-11 00:14:06,836 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-11 00:14:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:07,152 INFO L93 Difference]: Finished difference Result 3422 states and 10960 transitions. [2021-03-11 00:14:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:14:07,153 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 00:14:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:07,157 INFO L225 Difference]: With dead ends: 3422 [2021-03-11 00:14:07,157 INFO L226 Difference]: Without dead ends: 3386 [2021-03-11 00:14:07,158 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 5222.4ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:14:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-03-11 00:14:07,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 1843. [2021-03-11 00:14:07,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1842 states have (on average 3.4044516829533116) internal successors, (6271), 1842 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 6271 transitions. [2021-03-11 00:14:07,184 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 6271 transitions. Word has length 26 [2021-03-11 00:14:07,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:07,184 INFO L480 AbstractCegarLoop]: Abstraction has 1843 states and 6271 transitions. [2021-03-11 00:14:07,184 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 00:14:07,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 6271 transitions. [2021-03-11 00:14:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:07,186 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:07,187 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 00:14:07,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1629,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:07,401 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:07,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:07,401 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-03-11 00:14:07,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:07,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111412726] [2021-03-11 00:14:07,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:07,737 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-03-11 00:14:08,205 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 00:14:08,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111412726] [2021-03-11 00:14:08,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385847101] [2021-03-11 00:14:08,205 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 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 00:14:08,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:14:08,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:08,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:14:08,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:08,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:08,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:08,958 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-03-11 00:14:08,958 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 00:14:08,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:08,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:08,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:08,997 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:14:08,997 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 28 [2021-03-11 00:14:08,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,051 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:14:09,051 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 00:14:09,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,099 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:14:09,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:14:09,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,146 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-03-11 00:14:09,146 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 25 [2021-03-11 00:14:09,148 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,175 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:14:09,175 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 00:14:09,177 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,223 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:14:09,223 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 00:14:09,230 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,274 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:14:09,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:14:09,277 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:09,317 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 23 treesize of output 41 [2021-03-11 00:14:09,328 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,372 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:14:09,373 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 30 treesize of output 32 [2021-03-11 00:14:09,379 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,406 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:14:09,406 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 28 treesize of output 1 [2021-03-11 00:14:09,407 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,446 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-03-11 00:14:09,446 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 25 [2021-03-11 00:14:09,449 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,474 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:14:09,474 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 00:14:09,475 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,500 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:14:09,501 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 00:14:09,502 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,528 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:14:09,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:14:09,529 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,546 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:14:09,546 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 00:14:09,547 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,709 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-11 00:14:09,709 INFO L628 ElimStorePlain]: treesize reduction 136, result has 44.3 percent of original size [2021-03-11 00:14:09,711 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 00:14:09,711 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:90 [2021-03-11 00:14:09,864 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 00:14:09,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:09,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:14:09,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706924280] [2021-03-11 00:14:09,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:14:09,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:09,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:14:09,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:14:09,865 INFO L87 Difference]: Start difference. First operand 1843 states and 6271 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 00:14:10,295 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2021-03-11 00:14:10,463 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-11 00:14:10,674 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-03-11 00:14:11,016 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-03-11 00:14:11,211 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-03-11 00:14:11,431 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-03-11 00:14:12,070 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-03-11 00:14:12,295 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2021-03-11 00:14:12,582 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-11 00:14:12,770 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:14:13,333 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-11 00:14:13,558 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:14:13,824 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-03-11 00:14:14,218 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-03-11 00:14:14,642 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-11 00:14:14,838 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-11 00:14:15,117 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-03-11 00:14:15,254 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-03-11 00:14:15,564 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-03-11 00:14:15,797 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-11 00:14:16,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:16,068 INFO L93 Difference]: Finished difference Result 3849 states and 12222 transitions. [2021-03-11 00:14:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:14:16,069 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 00:14:16,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:16,075 INFO L225 Difference]: With dead ends: 3849 [2021-03-11 00:14:16,075 INFO L226 Difference]: Without dead ends: 3792 [2021-03-11 00:14:16,075 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 6239.7ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:14:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2021-03-11 00:14:16,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 1871. [2021-03-11 00:14:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.4085561497326204) internal successors, (6374), 1870 states have internal predecessors, (6374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6374 transitions. [2021-03-11 00:14:16,105 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6374 transitions. Word has length 26 [2021-03-11 00:14:16,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:16,105 INFO L480 AbstractCegarLoop]: Abstraction has 1871 states and 6374 transitions. [2021-03-11 00:14:16,105 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 00:14:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6374 transitions. [2021-03-11 00:14:16,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:16,107 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:16,107 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 00:14:16,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1743,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:16,308 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:16,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2079051698, now seen corresponding path program 27 times [2021-03-11 00:14:16,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:16,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527630245] [2021-03-11 00:14:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:16,631 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-03-11 00:14:16,928 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-03-11 00:14:17,189 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-03-11 00:14:17,327 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-11 00:14:17,452 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-11 00:14:17,509 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 00:14:17,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527630245] [2021-03-11 00:14:17,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901826972] [2021-03-11 00:14:17,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:17,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:14:17,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:17,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:14:17,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:17,861 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:14:18,243 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-11 00:14:18,623 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-11 00:14:18,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:18,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 [2021-03-11 00:14:18,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:19,065 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-03-11 00:14:19,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:19,102 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:14:19,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:14:19,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:19,346 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-03-11 00:14:19,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:19,381 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:14:19,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:14:19,388 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:19,622 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-03-11 00:14:19,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:19,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:19,652 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:14:19,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:19,887 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-03-11 00:14:19,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:19,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:19,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:14:19,922 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:20,143 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-11 00:14:20,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:20,181 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:14:20,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:14:20,188 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:20,406 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-11 00:14:20,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:20,436 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:14:20,436 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 28 treesize of output 24 [2021-03-11 00:14:20,439 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:20,649 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-11 00:14:20,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:20,678 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:14:20,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:14:20,681 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:20,899 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-11 00:14:20,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:20,918 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 00:14:20,918 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:365, output treesize:376 [2021-03-11 00:14:21,435 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-11 00:14:21,601 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:14:21,627 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 00:14:21,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:21,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:14:21,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591785719] [2021-03-11 00:14:21,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:14:21,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:21,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:14:21,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:14:21,628 INFO L87 Difference]: Start difference. First operand 1871 states and 6374 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 00:14:21,884 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 33 [2021-03-11 00:14:22,411 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-03-11 00:14:22,875 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 46 [2021-03-11 00:14:23,118 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:14:23,542 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-03-11 00:14:24,028 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-11 00:14:24,584 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-03-11 00:14:24,979 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:14:25,442 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-03-11 00:14:26,674 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2021-03-11 00:14:27,356 WARN L205 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 111 [2021-03-11 00:14:28,276 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2021-03-11 00:14:30,043 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 123 DAG size of output: 109 [2021-03-11 00:14:31,167 WARN L205 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 139 [2021-03-11 00:14:31,937 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 77 [2021-03-11 00:14:32,416 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:14:33,302 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-03-11 00:14:33,798 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-11 00:14:34,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:34,087 INFO L93 Difference]: Finished difference Result 2616 states and 8514 transitions. [2021-03-11 00:14:34,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:14:34,089 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 00:14:34,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:34,093 INFO L225 Difference]: With dead ends: 2616 [2021-03-11 00:14:34,093 INFO L226 Difference]: Without dead ends: 2571 [2021-03-11 00:14:34,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 13216.1ms TimeCoverageRelationStatistics Valid=312, Invalid=1758, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:14:34,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-03-11 00:14:34,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1887. [2021-03-11 00:14:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 3.4056203605514317) internal successors, (6423), 1886 states have internal predecessors, (6423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 6423 transitions. [2021-03-11 00:14:34,118 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 6423 transitions. Word has length 26 [2021-03-11 00:14:34,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:34,118 INFO L480 AbstractCegarLoop]: Abstraction has 1887 states and 6423 transitions. [2021-03-11 00:14:34,118 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 00:14:34,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 6423 transitions. [2021-03-11 00:14:34,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:34,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:34,121 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 00:14:34,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1844 [2021-03-11 00:14:34,321 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:34,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 28 times [2021-03-11 00:14:34,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:34,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633761522] [2021-03-11 00:14:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:34,615 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-03-11 00:14:34,788 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-11 00:14:34,930 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-11 00:14:35,169 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 00:14:35,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633761522] [2021-03-11 00:14:35,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375149994] [2021-03-11 00:14:35,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:35,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:14:35,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:35,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:14:35,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:35,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:35,611 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:14:35,612 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 00:14:35,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:35,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:35,629 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:14:35,630 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 00:14:35,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:35,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:35,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:35,653 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 00:14:35,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:35,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:35,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:35,678 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 00:14:35,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:35,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:35,709 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:14:35,709 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 28 treesize of output 20 [2021-03-11 00:14:35,712 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:35,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:35,730 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:14:35,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:14:35,731 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:35,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:35,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:35,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:14:35,759 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:35,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:35,775 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:14:35,776 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 00:14:35,777 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:35,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:35,794 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:14:35,795 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 00:14:35,797 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:35,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:35,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:35,819 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 00:14:35,826 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:35,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:35,843 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:14:35,843 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 00:14:35,845 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:35,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:35,868 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:14:35,869 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 00:14:35,872 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:35,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:35,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:35,896 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 00:14:35,898 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:35,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:35,915 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:14:35,915 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 00:14:35,917 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:35,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:35,936 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:14:35,936 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 00:14:35,939 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:35,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:35,949 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:14:35,949 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 00:14:35,951 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:36,132 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:14:36,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:36,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:14:36,135 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:737, output treesize:229 [2021-03-11 00:14:36,313 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:14:36,573 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-11 00:14:36,705 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 00:14:36,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:36,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:14:36,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247217389] [2021-03-11 00:14:36,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:14:36,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:36,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:14:36,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:14:36,706 INFO L87 Difference]: Start difference. First operand 1887 states and 6423 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 00:14:36,896 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 29 [2021-03-11 00:14:37,109 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-11 00:14:37,359 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2021-03-11 00:14:37,716 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-03-11 00:14:38,447 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-11 00:14:38,797 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-11 00:14:39,508 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 47 [2021-03-11 00:14:39,899 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-11 00:14:40,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:40,153 INFO L93 Difference]: Finished difference Result 2525 states and 8371 transitions. [2021-03-11 00:14:40,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:14:40,154 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 00:14:40,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:40,158 INFO L225 Difference]: With dead ends: 2525 [2021-03-11 00:14:40,158 INFO L226 Difference]: Without dead ends: 2479 [2021-03-11 00:14:40,158 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 3800.7ms TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:14:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2021-03-11 00:14:40,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 1905. [2021-03-11 00:14:40,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1904 states have (on average 3.409138655462185) internal successors, (6491), 1904 states have internal predecessors, (6491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 6491 transitions. [2021-03-11 00:14:40,194 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 6491 transitions. Word has length 26 [2021-03-11 00:14:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:40,194 INFO L480 AbstractCegarLoop]: Abstraction has 1905 states and 6491 transitions. [2021-03-11 00:14:40,194 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 00:14:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 6491 transitions. [2021-03-11 00:14:40,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:40,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:40,197 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 00:14:40,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1872,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:40,397 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:40,398 INFO L82 PathProgramCache]: Analyzing trace with hash 2031976096, now seen corresponding path program 29 times [2021-03-11 00:14:40,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:40,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037780936] [2021-03-11 00:14:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:40,679 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-03-11 00:14:40,840 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-11 00:14:41,010 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:14:41,129 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-11 00:14:41,306 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 00:14:41,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037780936] [2021-03-11 00:14:41,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452818537] [2021-03-11 00:14:41,307 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 00:14:41,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:14:41,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:41,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:14:41,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:41,661 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:14:41,902 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-11 00:14:42,305 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:14:42,394 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_208, v_prenex_209, v_prenex_214], 3=[v_prenex_217, A, v_prenex_210, v_prenex_213, v_prenex_216]} [2021-03-11 00:14:42,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:42,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:42,415 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 00:14:42,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:42,666 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-03-11 00:14:42,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:42,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:42,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:42,687 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 00:14:42,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:42,930 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-03-11 00:14:42,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:42,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:42,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:42,950 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 00:14:42,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:43,193 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-03-11 00:14:43,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:43,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:43,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:43,215 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:14:43,216 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 00:14:43,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:43,470 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-03-11 00:14:43,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:43,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:43,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:43,495 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:14:43,496 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 00:14:43,499 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:43,727 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-03-11 00:14:43,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:43,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:43,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:43,749 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:14:43,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:14:43,752 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:43,974 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-11 00:14:43,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:43,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:43,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:43,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:43,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:14:44,000 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:44,210 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-11 00:14:44,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:44,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:44,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:44,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:44,230 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 30 treesize of output 26 [2021-03-11 00:14:44,237 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:44,431 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-11 00:14:44,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:44,451 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 00:14:44,451 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:383, output treesize:212 [2021-03-11 00:14:44,804 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-11 00:14:44,978 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 00:14:44,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:44,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:14:44,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806660611] [2021-03-11 00:14:44,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:14:44,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:44,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:14:44,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:14:44,979 INFO L87 Difference]: Start difference. First operand 1905 states and 6491 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 00:14:45,256 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 28 [2021-03-11 00:14:45,716 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-03-11 00:14:46,109 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-03-11 00:14:46,575 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2021-03-11 00:14:46,841 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-03-11 00:14:47,234 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-03-11 00:14:48,283 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-03-11 00:14:48,984 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-03-11 00:14:49,469 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-03-11 00:14:49,992 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-11 00:14:50,820 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-03-11 00:14:51,061 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:14:51,587 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-03-11 00:14:51,780 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2021-03-11 00:14:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:51,869 INFO L93 Difference]: Finished difference Result 2754 states and 9026 transitions. [2021-03-11 00:14:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:14:51,870 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 00:14:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:51,875 INFO L225 Difference]: With dead ends: 2754 [2021-03-11 00:14:51,875 INFO L226 Difference]: Without dead ends: 2720 [2021-03-11 00:14:51,875 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 7787.4ms TimeCoverageRelationStatistics Valid=328, Invalid=1478, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:14:51,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-03-11 00:14:51,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 1898. [2021-03-11 00:14:51,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1897 states have (on average 3.4059040590405902) internal successors, (6461), 1897 states have internal predecessors, (6461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:51,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 6461 transitions. [2021-03-11 00:14:51,899 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 6461 transitions. Word has length 26 [2021-03-11 00:14:51,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:51,899 INFO L480 AbstractCegarLoop]: Abstraction has 1898 states and 6461 transitions. [2021-03-11 00:14:51,899 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 00:14:51,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 6461 transitions. [2021-03-11 00:14:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:51,902 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:51,902 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 00:14:52,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1888,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:52,102 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:52,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-03-11 00:14:52,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:52,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667963192] [2021-03-11 00:14:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:52,324 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-11 00:14:52,463 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-03-11 00:14:52,577 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-03-11 00:14:52,908 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 00:14:52,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667963192] [2021-03-11 00:14:52,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459187926] [2021-03-11 00:14:52,908 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 00:14:52,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:14:52,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:52,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:14:52,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:53,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,809 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 13 [2021-03-11 00:14:53,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:14:53,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,841 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 45 treesize of output 16 [2021-03-11 00:14:53,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,857 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 43 treesize of output 13 [2021-03-11 00:14:53,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,874 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 00:14:53,876 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-03-11 00:14:53,902 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,917 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 25 treesize of output 7 [2021-03-11 00:14:53,919 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,933 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 36 treesize of output 16 [2021-03-11 00:14:53,935 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,950 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 13 [2021-03-11 00:14:53,952 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,966 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 43 treesize of output 13 [2021-03-11 00:14:53,968 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,983 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 00:14:53,985 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:53,999 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 00:14:54,001 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:54,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:54,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:54,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:54,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:54,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:54,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:54,015 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 13 [2021-03-11 00:14:54,017 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:54,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:54,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:54,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:54,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:54,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:54,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:54,032 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 00:14:54,033 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:54,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:54,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:54,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:54,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:54,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:54,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:54,046 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 19 [2021-03-11 00:14:54,048 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:54,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:54,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:54,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:54,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:54,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:14:54,057 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:54,118 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-03-11 00:14:54,119 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 00:14:54,120 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-03-11 00:14:54,177 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 00:14:54,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:54,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:14:54,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688583133] [2021-03-11 00:14:54,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:14:54,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:54,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:14:54,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:14:54,178 INFO L87 Difference]: Start difference. First operand 1898 states and 6461 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 00:14:54,772 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2021-03-11 00:14:55,118 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-03-11 00:14:55,289 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-03-11 00:14:55,497 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2021-03-11 00:14:55,678 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2021-03-11 00:14:55,830 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2021-03-11 00:14:56,128 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-11 00:14:56,368 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-03-11 00:14:56,533 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2021-03-11 00:14:57,237 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-03-11 00:14:57,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:57,389 INFO L93 Difference]: Finished difference Result 2380 states and 7875 transitions. [2021-03-11 00:14:57,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:14:57,390 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 00:14:57,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:57,394 INFO L225 Difference]: With dead ends: 2380 [2021-03-11 00:14:57,394 INFO L226 Difference]: Without dead ends: 2358 [2021-03-11 00:14:57,394 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 3528.9ms TimeCoverageRelationStatistics Valid=290, Invalid=1270, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:14:57,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-03-11 00:14:57,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1890. [2021-03-11 00:14:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.4033880359978825) internal successors, (6429), 1889 states have internal predecessors, (6429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6429 transitions. [2021-03-11 00:14:57,415 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6429 transitions. Word has length 26 [2021-03-11 00:14:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:57,415 INFO L480 AbstractCegarLoop]: Abstraction has 1890 states and 6429 transitions. [2021-03-11 00:14:57,415 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 00:14:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6429 transitions. [2021-03-11 00:14:57,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:57,417 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:57,417 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 00:14:57,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1905,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:57,618 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:57,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:57,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-03-11 00:14:57,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:57,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922258426] [2021-03-11 00:14:57,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:57,858 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-03-11 00:14:58,028 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-11 00:14:58,405 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 00:14:58,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922258426] [2021-03-11 00:14:58,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571512586] [2021-03-11 00:14:58,405 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 00:14:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:58,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:14:58,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:58,923 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-03-11 00:14:59,009 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_221], 6=[v_prenex_219, v_prenex_223]} [2021-03-11 00:14:59,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:59,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:59,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:59,020 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-03-11 00:14:59,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:59,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:59,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:59,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2021-03-11 00:14:59,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:59,215 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-03-11 00:14:59,216 INFO L628 ElimStorePlain]: treesize reduction 170, result has 42.4 percent of original size [2021-03-11 00:14:59,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:59,222 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 00:14:59,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:59,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:59,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:59,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:59,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:59,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:59,298 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 31 treesize of output 13 [2021-03-11 00:14:59,300 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:59,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:59,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:59,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:59,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:14:59,368 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 29 treesize of output 13 [2021-03-11 00:14:59,370 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:59,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:59,425 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 00:14:59,426 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:365, output treesize:43 [2021-03-11 00:14:59,521 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 00:14:59,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:59,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:14:59,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638334695] [2021-03-11 00:14:59,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:14:59,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:59,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:14:59,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:14:59,522 INFO L87 Difference]: Start difference. First operand 1890 states and 6429 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 00:15:00,629 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-03-11 00:15:00,789 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 35 [2021-03-11 00:15:01,238 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2021-03-11 00:15:01,421 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-03-11 00:15:01,602 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-03-11 00:15:01,769 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-03-11 00:15:02,019 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-11 00:15:02,450 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-11 00:15:02,697 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-03-11 00:15:03,000 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-03-11 00:15:03,267 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-03-11 00:15:03,914 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-03-11 00:15:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:04,189 INFO L93 Difference]: Finished difference Result 2577 states and 8513 transitions. [2021-03-11 00:15:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:15:04,190 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 00:15:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:04,194 INFO L225 Difference]: With dead ends: 2577 [2021-03-11 00:15:04,194 INFO L226 Difference]: Without dead ends: 2562 [2021-03-11 00:15:04,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 4671.4ms TimeCoverageRelationStatistics Valid=476, Invalid=1876, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:15:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-03-11 00:15:04,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1890. [2021-03-11 00:15:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.4033880359978825) internal successors, (6429), 1889 states have internal predecessors, (6429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6429 transitions. [2021-03-11 00:15:04,218 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6429 transitions. Word has length 26 [2021-03-11 00:15:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:04,218 INFO L480 AbstractCegarLoop]: Abstraction has 1890 states and 6429 transitions. [2021-03-11 00:15:04,218 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 00:15:04,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6429 transitions. [2021-03-11 00:15:04,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:15:04,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:04,220 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 00:15:04,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2011,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:04,421 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:04,421 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-03-11 00:15:04,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:04,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245072369] [2021-03-11 00:15:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:04,958 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-03-11 00:15:05,199 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-11 00:15:05,307 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 00:15:05,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245072369] [2021-03-11 00:15:05,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272114461] [2021-03-11 00:15:05,307 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 00:15:05,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:15:05,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:05,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:15:05,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:06,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:06,384 INFO L354 Elim1Store]: treesize reduction 20, result has 55.6 percent of original size [2021-03-11 00:15:06,384 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 40 [2021-03-11 00:15:06,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:06,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:06,480 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-03-11 00:15:06,481 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 30 treesize of output 52 [2021-03-11 00:15:06,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:06,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:06,592 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-03-11 00:15:06,592 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 37 treesize of output 51 [2021-03-11 00:15:06,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:06,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:06,694 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-03-11 00:15:06,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 47 [2021-03-11 00:15:06,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:06,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:06,798 INFO L354 Elim1Store]: treesize reduction 17, result has 62.2 percent of original size [2021-03-11 00:15:06,798 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 39 treesize of output 46 [2021-03-11 00:15:06,801 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:06,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:06,890 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-03-11 00:15:06,891 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 30 treesize of output 44 [2021-03-11 00:15:06,903 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:06,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:07,005 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-03-11 00:15:07,005 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 30 treesize of output 52 [2021-03-11 00:15:07,023 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:07,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:07,124 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-03-11 00:15:07,124 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 00:15:07,132 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:07,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:07,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:07,204 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 23 treesize of output 57 [2021-03-11 00:15:07,224 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:07,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:07,326 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-03-11 00:15:07,326 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 55 [2021-03-11 00:15:07,336 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:07,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:07,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:07,416 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 37 treesize of output 63 [2021-03-11 00:15:07,435 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:07,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:07,475 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-03-11 00:15:07,475 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 37 treesize of output 1 [2021-03-11 00:15:07,477 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:07,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:07,566 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-03-11 00:15:07,566 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 44 [2021-03-11 00:15:07,579 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:07,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:07,621 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-03-11 00:15:07,621 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 37 treesize of output 1 [2021-03-11 00:15:07,623 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:07,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:07,709 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-03-11 00:15:07,710 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 39 treesize of output 37 [2021-03-11 00:15:07,712 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:07,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:07,738 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-03-11 00:15:07,738 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 32 treesize of output 1 [2021-03-11 00:15:07,740 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:09,196 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-03-11 00:15:09,196 INFO L628 ElimStorePlain]: treesize reduction 357, result has 50.3 percent of original size [2021-03-11 00:15:09,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-03-11 00:15:09,202 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:945, output treesize:402 [2021-03-11 00:15:09,768 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-11 00:15:10,000 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 00:15:10,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:10,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-11 00:15:10,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111416853] [2021-03-11 00:15:10,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:15:10,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:10,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:15:10,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:15:10,001 INFO L87 Difference]: Start difference. First operand 1890 states and 6429 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 00:15:10,503 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-11 00:15:10,681 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-11 00:15:11,148 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-03-11 00:15:11,530 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2021-03-11 00:15:11,723 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-11 00:15:11,992 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-11 00:15:12,204 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2021-03-11 00:15:12,811 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-03-11 00:15:13,123 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-11 00:15:13,310 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-11 00:15:13,872 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-11 00:15:14,396 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-03-11 00:15:15,198 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-11 00:15:15,418 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-03-11 00:15:15,618 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-11 00:15:15,834 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-11 00:15:16,087 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-03-11 00:15:16,351 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-03-11 00:15:16,598 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-11 00:15:16,854 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-11 00:15:17,102 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-11 00:15:17,649 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-03-11 00:15:18,161 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-03-11 00:15:18,604 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-03-11 00:15:19,023 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2021-03-11 00:15:19,446 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-03-11 00:15:19,774 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-03-11 00:15:20,096 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-11 00:15:20,603 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-03-11 00:15:21,289 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-03-11 00:15:21,617 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-03-11 00:15:22,057 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-03-11 00:15:22,297 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-11 00:15:22,506 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-03-11 00:15:23,138 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-03-11 00:15:23,559 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-03-11 00:15:24,024 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-11 00:15:24,219 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2021-03-11 00:15:24,515 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2021-03-11 00:15:24,763 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2021-03-11 00:15:24,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:24,867 INFO L93 Difference]: Finished difference Result 3267 states and 10417 transitions. [2021-03-11 00:15:24,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-11 00:15:24,869 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 00:15:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:24,873 INFO L225 Difference]: With dead ends: 3267 [2021-03-11 00:15:24,873 INFO L226 Difference]: Without dead ends: 3226 [2021-03-11 00:15:24,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 14754.1ms TimeCoverageRelationStatistics Valid=871, Invalid=4531, Unknown=0, NotChecked=0, Total=5402 [2021-03-11 00:15:24,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-03-11 00:15:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 1912. [2021-03-11 00:15:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 3.3966509680795394) internal successors, (6491), 1911 states have internal predecessors, (6491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 6491 transitions. [2021-03-11 00:15:24,901 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 6491 transitions. Word has length 26 [2021-03-11 00:15:24,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:24,901 INFO L480 AbstractCegarLoop]: Abstraction has 1912 states and 6491 transitions. [2021-03-11 00:15:24,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 00:15:24,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 6491 transitions. [2021-03-11 00:15:24,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:15:24,903 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:24,903 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 00:15:25,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2025,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:25,104 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:25,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:25,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1044384706, now seen corresponding path program 51 times [2021-03-11 00:15:25,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:25,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993060390] [2021-03-11 00:15:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:25,345 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 31 [2021-03-11 00:15:25,486 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-03-11 00:15:25,770 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-11 00:15:26,061 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 00:15:26,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993060390] [2021-03-11 00:15:26,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655546329] [2021-03-11 00:15:26,062 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 00:15:26,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:15:26,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:26,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:15:26,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:27,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,141 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-03-11 00:15:27,141 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 45 [2021-03-11 00:15:27,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:27,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,208 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-03-11 00:15:27,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 28 [2021-03-11 00:15:27,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:27,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,266 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-11 00:15:27,266 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 43 treesize of output 25 [2021-03-11 00:15:27,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:27,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,342 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 00:15:27,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 38 [2021-03-11 00:15:27,353 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:27,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,414 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-03-11 00:15:27,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:15:27,417 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:27,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,473 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-11 00:15:27,474 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 25 [2021-03-11 00:15:27,476 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:27,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,545 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 00:15:27,546 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 38 [2021-03-11 00:15:27,553 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:27,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,611 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:15:27,611 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 34 treesize of output 1 [2021-03-11 00:15:27,613 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:27,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,652 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:15:27,652 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 43 treesize of output 1 [2021-03-11 00:15:27,654 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:27,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,689 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:15:27,689 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 45 treesize of output 1 [2021-03-11 00:15:27,691 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:27,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,726 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:15:27,727 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 41 treesize of output 1 [2021-03-11 00:15:27,728 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:27,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,765 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:15:27,765 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 34 treesize of output 1 [2021-03-11 00:15:27,767 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:27,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,802 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:15:27,803 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 00:15:27,804 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:27,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:27,866 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 25 treesize of output 53 [2021-03-11 00:15:27,886 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:27,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,940 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-03-11 00:15:27,940 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 25 [2021-03-11 00:15:27,943 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:27,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:27,964 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:15:27,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:15:27,966 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:28,241 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-03-11 00:15:28,242 INFO L628 ElimStorePlain]: treesize reduction 157, result has 50.3 percent of original size [2021-03-11 00:15:28,244 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 00:15:28,244 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:180 [2021-03-11 00:15:28,406 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:15:28,667 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-11 00:15:28,770 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 00:15:28,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:28,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-03-11 00:15:28,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4370260] [2021-03-11 00:15:28,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:15:28,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:28,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:15:28,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:15:28,771 INFO L87 Difference]: Start difference. First operand 1912 states and 6491 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 00:15:29,555 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-11 00:15:29,906 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2021-03-11 00:15:30,152 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2021-03-11 00:15:30,547 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-03-11 00:15:30,773 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-03-11 00:15:31,037 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 33 [2021-03-11 00:15:31,195 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2021-03-11 00:15:31,472 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-03-11 00:15:32,065 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-03-11 00:15:32,513 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-11 00:15:32,921 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-03-11 00:15:33,241 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-11 00:15:33,491 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:15:33,765 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:15:34,138 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-03-11 00:15:34,289 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-11 00:15:34,554 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:15:35,002 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-11 00:15:35,194 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-11 00:15:35,558 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-03-11 00:15:35,764 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:15:36,191 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-11 00:15:36,580 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-11 00:15:37,097 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-11 00:15:37,442 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-11 00:15:37,708 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2021-03-11 00:15:38,378 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-03-11 00:15:38,777 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-03-11 00:15:39,052 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2021-03-11 00:15:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:39,267 INFO L93 Difference]: Finished difference Result 3131 states and 10142 transitions. [2021-03-11 00:15:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-11 00:15:39,268 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 00:15:39,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:39,274 INFO L225 Difference]: With dead ends: 3131 [2021-03-11 00:15:39,274 INFO L226 Difference]: Without dead ends: 3075 [2021-03-11 00:15:39,274 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 10702.0ms TimeCoverageRelationStatistics Valid=663, Invalid=3243, Unknown=0, NotChecked=0, Total=3906 [2021-03-11 00:15:39,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2021-03-11 00:15:39,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 1900. [2021-03-11 00:15:39,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 3.3933649289099526) internal successors, (6444), 1899 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:39,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 6444 transitions. [2021-03-11 00:15:39,302 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 6444 transitions. Word has length 26 [2021-03-11 00:15:39,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:39,302 INFO L480 AbstractCegarLoop]: Abstraction has 1900 states and 6444 transitions. [2021-03-11 00:15:39,302 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 00:15:39,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 6444 transitions. [2021-03-11 00:15:39,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:15:39,304 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:39,304 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 00:15:39,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2186,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:39,505 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:39,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:39,505 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 52 times [2021-03-11 00:15:39,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:39,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075274395] [2021-03-11 00:15:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:40,257 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 00:15:40,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075274395] [2021-03-11 00:15:40,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160423916] [2021-03-11 00:15:40,257 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 00:15:40,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:15:40,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:40,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:15:40,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:41,025 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:15:41,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:41,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:41,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:41,537 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 39 treesize of output 47 [2021-03-11 00:15:41,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:41,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:41,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:41,619 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:15:41,619 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 00:15:41,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:43,071 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 164 DAG size of output: 153 [2021-03-11 00:15:43,072 INFO L628 ElimStorePlain]: treesize reduction 40, result has 94.9 percent of original size [2021-03-11 00:15:43,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:43,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:43,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:43,139 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 00:15:43,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:43,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:43,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:43,180 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:15:43,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:15:43,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:43,873 WARN L205 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-03-11 00:15:43,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:43,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:43,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:43,949 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:15:43,949 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 00:15:43,952 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:43,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:43,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:44,002 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-03-11 00:15:44,002 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 00:15:44,006 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:44,624 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-03-11 00:15:44,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:44,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:44,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:44,696 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:15:44,697 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 00:15:44,706 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:44,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:44,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:44,735 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:15:44,735 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 00:15:44,737 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:45,295 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-03-11 00:15:45,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:45,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:45,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:45,363 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:15:45,363 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 00:15:45,372 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:45,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:45,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:45,445 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-03-11 00:15:45,445 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 00:15:45,453 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:45,973 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-03-11 00:15:45,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:45,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:45,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:46,061 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:15:46,061 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 00:15:46,066 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:46,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:46,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:46,132 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-03-11 00:15:46,132 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 00:15:46,136 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:46,651 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-11 00:15:46,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:46,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:46,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:46,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:46,706 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 00:15:46,722 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:46,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:46,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:46,773 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:15:46,773 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 00:15:46,778 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:47,285 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-11 00:15:47,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:47,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:47,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:47,357 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:15:47,358 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 00:15:47,367 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:47,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:47,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:47,391 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:15:47,391 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 00:15:47,393 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:47,786 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-03-11 00:15:47,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:47,805 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 00:15:47,805 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:348 [2021-03-11 00:15:48,200 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-03-11 00:15:48,303 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 00:15:48,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:48,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:15:48,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572265740] [2021-03-11 00:15:48,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:15:48,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:48,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:15:48,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:15:48,304 INFO L87 Difference]: Start difference. First operand 1900 states and 6444 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 00:15:48,701 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-03-11 00:15:48,938 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-11 00:15:49,123 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-11 00:15:49,530 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-11 00:15:49,753 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-03-11 00:15:50,300 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-03-11 00:15:52,186 WARN L205 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-03-11 00:16:05,872 WARN L205 SmtUtils]: Spent 13.49 s on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-03-11 00:16:06,100 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:16:06,431 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-03-11 00:16:06,777 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-11 00:16:07,039 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-11 00:16:07,345 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-03-11 00:16:07,520 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-03-11 00:16:07,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:07,794 INFO L93 Difference]: Finished difference Result 2531 states and 8249 transitions. [2021-03-11 00:16:07,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:16:07,796 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 00:16:07,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:07,807 INFO L225 Difference]: With dead ends: 2531 [2021-03-11 00:16:07,807 INFO L226 Difference]: Without dead ends: 2486 [2021-03-11 00:16:07,808 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 19073.0ms TimeCoverageRelationStatistics Valid=346, Invalid=1634, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:16:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-03-11 00:16:07,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1911. [2021-03-11 00:16:07,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.399476439790576) internal successors, (6493), 1910 states have internal predecessors, (6493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6493 transitions. [2021-03-11 00:16:07,831 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6493 transitions. Word has length 26 [2021-03-11 00:16:07,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:07,832 INFO L480 AbstractCegarLoop]: Abstraction has 1911 states and 6493 transitions. [2021-03-11 00:16:07,832 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 00:16:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6493 transitions. [2021-03-11 00:16:07,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:16:07,834 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:07,834 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 00:16:08,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2316,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:08,034 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:08,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:08,035 INFO L82 PathProgramCache]: Analyzing trace with hash -538930356, now seen corresponding path program 53 times [2021-03-11 00:16:08,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:08,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709505586] [2021-03-11 00:16:08,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:08,378 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-11 00:16:08,535 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-03-11 00:16:08,737 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-03-11 00:16:08,869 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-11 00:16:09,118 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 00:16:09,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709505586] [2021-03-11 00:16:09,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998242984] [2021-03-11 00:16:09,119 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 00:16:09,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:16:09,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:09,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:16:09,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:09,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:09,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:09,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:09,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-03-11 00:16:09,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:09,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:09,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:09,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:09,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 59 [2021-03-11 00:16:09,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:09,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:09,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,041 INFO L354 Elim1Store]: treesize reduction 27, result has 34.1 percent of original size [2021-03-11 00:16:10,041 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 41 treesize of output 32 [2021-03-11 00:16:10,044 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:10,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,141 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-03-11 00:16:10,141 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 40 [2021-03-11 00:16:10,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:10,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,202 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:16:10,203 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 00:16:10,205 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:10,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,292 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-03-11 00:16:10,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 36 [2021-03-11 00:16:10,296 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:10,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,372 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-03-11 00:16:10,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 23 [2021-03-11 00:16:10,376 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:10,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,425 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:16:10,425 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 00:16:10,427 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:10,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,513 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-03-11 00:16:10,513 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 43 treesize of output 26 [2021-03-11 00:16:10,516 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:10,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,563 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:16:10,564 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 34 treesize of output 1 [2021-03-11 00:16:10,566 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:10,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,644 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-03-11 00:16:10,644 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 41 treesize of output 26 [2021-03-11 00:16:10,648 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:10,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,697 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:16:10,698 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 41 treesize of output 1 [2021-03-11 00:16:10,700 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:10,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,794 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-03-11 00:16:10,794 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 36 [2021-03-11 00:16:10,805 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:10,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,895 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-03-11 00:16:10,895 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 27 [2021-03-11 00:16:10,899 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:10,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,948 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:16:10,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:16:10,950 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:10,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:10,978 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:16:10,979 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 41 treesize of output 1 [2021-03-11 00:16:10,981 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:11,283 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2021-03-11 00:16:11,284 INFO L628 ElimStorePlain]: treesize reduction 230, result has 32.2 percent of original size [2021-03-11 00:16:11,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:16:11,286 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:109 [2021-03-11 00:16:11,447 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:16:11,741 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 00:16:11,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:11,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-03-11 00:16:11,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035700845] [2021-03-11 00:16:11,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:16:11,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:11,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:16:11,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:16:11,742 INFO L87 Difference]: Start difference. First operand 1911 states and 6493 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 00:16:12,315 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2021-03-11 00:16:12,606 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2021-03-11 00:16:13,036 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-11 00:16:13,288 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2021-03-11 00:16:13,555 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2021-03-11 00:16:13,991 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-11 00:16:14,294 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2021-03-11 00:16:14,529 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-03-11 00:16:14,812 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-03-11 00:16:15,208 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-03-11 00:16:15,455 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-03-11 00:16:15,661 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-03-11 00:16:15,894 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-03-11 00:16:16,166 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-11 00:16:16,449 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-11 00:16:16,870 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-03-11 00:16:17,122 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2021-03-11 00:16:17,520 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2021-03-11 00:16:17,882 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2021-03-11 00:16:18,114 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2021-03-11 00:16:18,725 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-03-11 00:16:19,438 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 66 [2021-03-11 00:16:20,058 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2021-03-11 00:16:20,670 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2021-03-11 00:16:21,383 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-11 00:16:22,189 WARN L205 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2021-03-11 00:16:22,660 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2021-03-11 00:16:23,267 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2021-03-11 00:16:23,929 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-03-11 00:16:24,180 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 28 [2021-03-11 00:16:24,593 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-11 00:16:25,531 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2021-03-11 00:16:25,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:25,618 INFO L93 Difference]: Finished difference Result 3133 states and 9939 transitions. [2021-03-11 00:16:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:16:25,621 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 00:16:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:25,626 INFO L225 Difference]: With dead ends: 3133 [2021-03-11 00:16:25,626 INFO L226 Difference]: Without dead ends: 3095 [2021-03-11 00:16:25,626 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 12897.1ms TimeCoverageRelationStatistics Valid=642, Invalid=2898, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:16:25,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-03-11 00:16:25,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 1918. [2021-03-11 00:16:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.4042775169535733) internal successors, (6526), 1917 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 6526 transitions. [2021-03-11 00:16:25,653 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 6526 transitions. Word has length 26 [2021-03-11 00:16:25,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:25,653 INFO L480 AbstractCegarLoop]: Abstraction has 1918 states and 6526 transitions. [2021-03-11 00:16:25,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 00:16:25,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 6526 transitions. [2021-03-11 00:16:25,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:16:25,655 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:25,655 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 00:16:25,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2384,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:25,856 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:25,856 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 30 times [2021-03-11 00:16:25,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:25,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598971401] [2021-03-11 00:16:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:26,230 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-03-11 00:16:26,409 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-03-11 00:16:26,567 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-11 00:16:26,697 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-11 00:16:26,767 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 00:16:26,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598971401] [2021-03-11 00:16:26,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657700006] [2021-03-11 00:16:26,768 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 00:16:26,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:16:26,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:26,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:16:26,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:27,271 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:16:27,775 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-11 00:16:27,999 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:16:28,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:28,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:28,592 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:16:28,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:28,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:28,642 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:16:28,643 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:16:28,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:29,098 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-11 00:16:29,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:29,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:29,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:29,149 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:16:29,155 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:29,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:29,211 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:16:29,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:16:29,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:29,654 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-11 00:16:29,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:29,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:29,720 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:16:29,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:16:29,730 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:29,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:29,792 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:16:29,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:16:29,796 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:30,212 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-11 00:16:30,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:30,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:30,278 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:16:30,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:16:30,282 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:30,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:30,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:30,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:16:30,336 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:30,740 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-11 00:16:30,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:30,784 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 00:16:30,784 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:357, output treesize:334 [2021-03-11 00:16:31,593 WARN L205 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-03-11 00:16:31,830 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:16:31,852 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 00:16:31,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:31,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:16:31,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071181187] [2021-03-11 00:16:31,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:16:31,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:16:31,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:16:31,853 INFO L87 Difference]: Start difference. First operand 1918 states and 6526 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 00:16:32,172 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-03-11 00:16:32,726 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-11 00:16:33,085 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-03-11 00:16:33,425 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:16:33,846 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 31 [2021-03-11 00:16:34,359 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-11 00:16:35,180 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-03-11 00:16:36,063 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 47 [2021-03-11 00:16:37,504 WARN L205 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 70 [2021-03-11 00:16:37,718 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-11 00:16:38,354 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-03-11 00:16:38,933 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-11 00:16:39,576 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 87 [2021-03-11 00:16:40,085 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-03-11 00:16:40,928 WARN L205 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-03-11 00:16:41,638 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-11 00:16:42,488 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-03-11 00:16:43,461 WARN L205 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-03-11 00:16:44,576 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-03-11 00:16:45,321 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2021-03-11 00:16:45,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:45,545 INFO L93 Difference]: Finished difference Result 2567 states and 8413 transitions. [2021-03-11 00:16:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:16:45,547 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 00:16:45,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:45,551 INFO L225 Difference]: With dead ends: 2567 [2021-03-11 00:16:45,551 INFO L226 Difference]: Without dead ends: 2537 [2021-03-11 00:16:45,551 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 13153.7ms TimeCoverageRelationStatistics Valid=275, Invalid=1795, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:16:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-03-11 00:16:45,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1920. [2021-03-11 00:16:45,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1919 states have (on average 3.4048983845753) internal successors, (6534), 1919 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 6534 transitions. [2021-03-11 00:16:45,575 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 6534 transitions. Word has length 26 [2021-03-11 00:16:45,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:45,575 INFO L480 AbstractCegarLoop]: Abstraction has 1920 states and 6534 transitions. [2021-03-11 00:16:45,575 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 00:16:45,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 6534 transitions. [2021-03-11 00:16:45,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:16:45,577 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:45,577 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 00:16:45,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2421 [2021-03-11 00:16:45,779 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:45,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:45,779 INFO L82 PathProgramCache]: Analyzing trace with hash -589649742, now seen corresponding path program 31 times [2021-03-11 00:16:45,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:45,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705669361] [2021-03-11 00:16:45,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:46,202 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-03-11 00:16:46,640 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-11 00:16:47,060 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-11 00:16:47,262 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2021-03-11 00:16:47,390 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 00:16:47,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705669361] [2021-03-11 00:16:47,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382200658] [2021-03-11 00:16:47,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:47,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:16:47,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:47,883 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:16:48,177 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:16:48,987 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2021-03-11 00:16:49,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:49,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:49,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:49,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:16:49,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:49,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:49,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:49,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:16:49,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:49,501 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-11 00:16:49,502 INFO L628 ElimStorePlain]: treesize reduction 55, result has 68.4 percent of original size [2021-03-11 00:16:49,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:49,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:49,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:16:49,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:49,664 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:16:49,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:49,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:49,674 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 00:16:49,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:49,824 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:16:49,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:49,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:16:49,830 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:215, output treesize:51 [2021-03-11 00:16:50,023 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 00:16:50,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:50,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:16:50,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179234880] [2021-03-11 00:16:50,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:16:50,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:50,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:16:50,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:16:50,024 INFO L87 Difference]: Start difference. First operand 1920 states and 6534 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 00:16:50,241 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2021-03-11 00:16:50,821 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-03-11 00:16:51,129 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-11 00:16:51,966 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-03-11 00:16:52,157 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:16:52,594 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-03-11 00:16:52,883 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:16:53,714 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-03-11 00:16:54,092 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-11 00:16:54,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:54,374 INFO L93 Difference]: Finished difference Result 2316 states and 7767 transitions. [2021-03-11 00:16:54,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:16:54,376 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 00:16:54,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:54,380 INFO L225 Difference]: With dead ends: 2316 [2021-03-11 00:16:54,380 INFO L226 Difference]: Without dead ends: 2301 [2021-03-11 00:16:54,380 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 5996.1ms TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:16:54,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-03-11 00:16:54,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1912. [2021-03-11 00:16:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 3.4081632653061225) internal successors, (6513), 1911 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 6513 transitions. [2021-03-11 00:16:54,402 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 6513 transitions. Word has length 26 [2021-03-11 00:16:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:54,402 INFO L480 AbstractCegarLoop]: Abstraction has 1912 states and 6513 transitions. [2021-03-11 00:16:54,402 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 00:16:54,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 6513 transitions. [2021-03-11 00:16:54,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:16:54,404 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:54,405 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 00:16:54,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2487 [2021-03-11 00:16:54,619 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:54,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:54,619 INFO L82 PathProgramCache]: Analyzing trace with hash 224636922, now seen corresponding path program 32 times [2021-03-11 00:16:54,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:54,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309383376] [2021-03-11 00:16:54,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:55,141 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-03-11 00:16:55,373 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-11 00:16:55,560 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-11 00:16:55,735 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-11 00:16:55,856 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 00:16:55,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309383376] [2021-03-11 00:16:55,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837943550] [2021-03-11 00:16:55,856 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 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 00:16:55,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:16:55,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:55,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:16:55,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:56,272 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:16:56,451 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:16:56,635 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:16:56,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:56,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,771 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 36 treesize of output 20 [2021-03-11 00:16:56,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:56,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 46 treesize of output 26 [2021-03-11 00:16:56,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:56,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:56,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 23 [2021-03-11 00:16:56,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:56,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:56,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 26 [2021-03-11 00:16:56,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:56,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:56,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 20 [2021-03-11 00:16:56,853 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:56,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:56,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 23 [2021-03-11 00:16:56,872 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:56,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:56,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 34 treesize of output 20 [2021-03-11 00:16:56,894 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:56,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:56,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 17 [2021-03-11 00:16:56,916 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:56,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:56,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 23 [2021-03-11 00:16:56,936 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:56,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:56,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 23 [2021-03-11 00:16:56,956 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:56,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:56,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 52 treesize of output 26 [2021-03-11 00:16:56,975 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:56,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:56,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:56,993 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 43 treesize of output 23 [2021-03-11 00:16:56,996 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:57,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:57,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:57,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:57,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2021-03-11 00:16:57,015 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:57,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:57,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:57,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:57,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-03-11 00:16:57,034 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:57,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:57,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:57,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:57,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 34 treesize of output 20 [2021-03-11 00:16:57,054 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:57,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:57,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:57,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 23 [2021-03-11 00:16:57,067 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:57,459 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2021-03-11 00:16:57,460 INFO L628 ElimStorePlain]: treesize reduction 343, result has 25.3 percent of original size [2021-03-11 00:16:57,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:16:57,462 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:116 [2021-03-11 00:16:57,670 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:16:57,873 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 00:16:57,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:57,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:16:57,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385497495] [2021-03-11 00:16:57,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:16:57,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:57,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:16:57,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:16:57,874 INFO L87 Difference]: Start difference. First operand 1912 states and 6513 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 00:16:58,116 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 28 [2021-03-11 00:16:58,672 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-11 00:16:59,096 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-11 00:16:59,662 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-03-11 00:16:59,814 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:17:00,476 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-11 00:17:01,097 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-03-11 00:17:01,295 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:17:02,029 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2021-03-11 00:17:02,454 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-11 00:17:02,959 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2021-03-11 00:17:03,272 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:17:04,018 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-03-11 00:17:04,289 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:17:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:04,450 INFO L93 Difference]: Finished difference Result 2750 states and 9029 transitions. [2021-03-11 00:17:04,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:17:04,452 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 00:17:04,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:04,457 INFO L225 Difference]: With dead ends: 2750 [2021-03-11 00:17:04,457 INFO L226 Difference]: Without dead ends: 2714 [2021-03-11 00:17:04,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 6834.3ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:17:04,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-03-11 00:17:04,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1938. [2021-03-11 00:17:04,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 3.4021683014971607) internal successors, (6590), 1937 states have internal predecessors, (6590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 6590 transitions. [2021-03-11 00:17:04,483 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 6590 transitions. Word has length 26 [2021-03-11 00:17:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:04,483 INFO L480 AbstractCegarLoop]: Abstraction has 1938 states and 6590 transitions. [2021-03-11 00:17:04,483 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 00:17:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 6590 transitions. [2021-03-11 00:17:04,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:17:04,485 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:04,485 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 00:17:04,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2507,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:04,686 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:04,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:04,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1013178648, now seen corresponding path program 33 times [2021-03-11 00:17:04,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:04,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607014975] [2021-03-11 00:17:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:05,083 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-03-11 00:17:05,369 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-11 00:17:05,558 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-11 00:17:05,722 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 00:17:05,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607014975] [2021-03-11 00:17:05,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260241972] [2021-03-11 00:17:05,723 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 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 00:17:05,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:17:05,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:05,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:17:05,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:06,377 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:17:06,666 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-11 00:17:06,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:06,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:06,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:17:06,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:06,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:07,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:07,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 [2021-03-11 00:17:07,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:08,140 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2021-03-11 00:17:08,141 INFO L628 ElimStorePlain]: treesize reduction 17, result has 95.0 percent of original size [2021-03-11 00:17:08,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:08,209 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:17:08,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:17:08,214 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:08,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:08,279 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:17:08,279 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:17:08,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:08,737 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-11 00:17:08,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:08,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:08,808 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:17:08,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:17:08,812 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:08,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:08,866 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:17:08,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:17:08,870 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:09,369 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-11 00:17:09,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:09,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:09,445 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:17:09,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:17:09,456 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:09,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:09,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:09,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:17:09,520 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:09,988 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-11 00:17:09,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:10,026 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 00:17:10,026 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:357, output treesize:292 [2021-03-11 00:17:10,936 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-03-11 00:17:11,255 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:17:11,302 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 00:17:11,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:11,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-11 00:17:11,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661686186] [2021-03-11 00:17:11,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:17:11,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:11,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:17:11,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:17:11,303 INFO L87 Difference]: Start difference. First operand 1938 states and 6590 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 00:17:11,769 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-03-11 00:17:12,099 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2021-03-11 00:17:12,706 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 41 [2021-03-11 00:17:13,701 WARN L205 SmtUtils]: Spent 924.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-03-11 00:17:15,148 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-03-11 00:17:15,729 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 47 [2021-03-11 00:17:16,649 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-03-11 00:17:17,672 WARN L205 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-03-11 00:17:18,380 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2021-03-11 00:17:19,510 WARN L205 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-03-11 00:17:20,057 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 31 [2021-03-11 00:17:20,657 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 40 [2021-03-11 00:17:20,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:20,807 INFO L93 Difference]: Finished difference Result 2529 states and 8394 transitions. [2021-03-11 00:17:20,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:17:20,810 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 00:17:20,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:20,814 INFO L225 Difference]: With dead ends: 2529 [2021-03-11 00:17:20,814 INFO L226 Difference]: Without dead ends: 2514 [2021-03-11 00:17:20,814 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 10796.1ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:17:20,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-03-11 00:17:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1937. [2021-03-11 00:17:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 3.4008264462809916) internal successors, (6584), 1936 states have internal predecessors, (6584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 6584 transitions. [2021-03-11 00:17:20,838 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 6584 transitions. Word has length 26 [2021-03-11 00:17:20,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:20,838 INFO L480 AbstractCegarLoop]: Abstraction has 1937 states and 6584 transitions. [2021-03-11 00:17:20,838 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 00:17:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 6584 transitions. [2021-03-11 00:17:20,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:17:20,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:20,841 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 00:17:21,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2525 [2021-03-11 00:17:21,043 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:21,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:21,043 INFO L82 PathProgramCache]: Analyzing trace with hash -964138634, now seen corresponding path program 34 times [2021-03-11 00:17:21,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:21,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688118263] [2021-03-11 00:17:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:21,575 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-11 00:17:22,097 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-03-11 00:17:22,294 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-11 00:17:22,485 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-11 00:17:22,570 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 00:17:22,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688118263] [2021-03-11 00:17:22,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812200732] [2021-03-11 00:17:22,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:17:22,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:17:22,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:22,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:17:22,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:23,123 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:17:23,878 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-03-11 00:17:24,932 WARN L205 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 68 [2021-03-11 00:17:25,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:17:25,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:25,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:17:25,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:25,837 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-03-11 00:17:25,838 INFO L628 ElimStorePlain]: treesize reduction 62, result has 72.6 percent of original size [2021-03-11 00:17:25,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:25,850 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 00:17:25,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:26,080 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:17:26,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:26,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:17:26,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:26,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:17:26,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:17:26,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:26,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:17:26,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:26,115 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 28 treesize of output 16 [2021-03-11 00:17:26,118 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:26,296 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:17:26,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:26,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:17:26,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:26,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:17:26,311 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:26,466 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:17:26,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:26,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:17:26,474 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:247, output treesize:51 [2021-03-11 00:17:26,646 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 00:17:26,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:26,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:17:26,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587204584] [2021-03-11 00:17:26,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:17:26,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:26,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:17:26,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:17:26,647 INFO L87 Difference]: Start difference. First operand 1937 states and 6584 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 00:17:26,878 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 28 [2021-03-11 00:17:27,630 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-03-11 00:17:28,026 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-03-11 00:17:29,096 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-03-11 00:17:29,307 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:17:29,791 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2021-03-11 00:17:30,274 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-03-11 00:17:30,604 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:17:32,220 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 146 DAG size of output: 126 [2021-03-11 00:17:32,958 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-11 00:17:33,848 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-03-11 00:17:34,927 WARN L205 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 122 [2021-03-11 00:17:35,417 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-11 00:17:35,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:35,922 INFO L93 Difference]: Finished difference Result 2833 states and 9241 transitions. [2021-03-11 00:17:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:17:35,924 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 00:17:35,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:35,929 INFO L225 Difference]: With dead ends: 2833 [2021-03-11 00:17:35,929 INFO L226 Difference]: Without dead ends: 2788 [2021-03-11 00:17:35,929 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 10575.2ms TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:17:35,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2788 states. [2021-03-11 00:17:35,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2788 to 1948. [2021-03-11 00:17:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.403697996918336) internal successors, (6627), 1947 states have internal predecessors, (6627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:35,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6627 transitions. [2021-03-11 00:17:35,954 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6627 transitions. Word has length 26 [2021-03-11 00:17:35,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:35,954 INFO L480 AbstractCegarLoop]: Abstraction has 1948 states and 6627 transitions. [2021-03-11 00:17:35,954 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 00:17:35,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6627 transitions. [2021-03-11 00:17:35,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:17:35,957 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:35,957 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 00:17:36,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2567 [2021-03-11 00:17:36,157 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:36,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:36,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1713295882, now seen corresponding path program 35 times [2021-03-11 00:17:36,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:36,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984070339] [2021-03-11 00:17:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:36,632 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-11 00:17:36,868 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-11 00:17:37,048 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-11 00:17:37,233 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 00:17:37,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984070339] [2021-03-11 00:17:37,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897283370] [2021-03-11 00:17:37,233 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 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 00:17:37,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:17:37,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:37,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:17:37,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:37,664 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:17:37,813 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:17:38,391 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:17:38,522 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_305, A, v_prenex_293, v_prenex_295, v_prenex_297, v_prenex_301], 3=[v_prenex_299, v_prenex_303]} [2021-03-11 00:17:38,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:38,560 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:17:38,561 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 00:17:38,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:38,969 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-11 00:17:38,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:38,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:39,008 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:17:39,009 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 00:17:39,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:39,414 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-03-11 00:17:39,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:39,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:39,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:39,453 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 00:17:39,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:39,881 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-11 00:17:39,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:39,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:39,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:39,916 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 00:17:39,930 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:40,311 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-11 00:17:40,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:40,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:40,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:40,347 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 00:17:40,350 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:40,738 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-03-11 00:17:40,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:40,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:40,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:40,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:17:40,778 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:41,117 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-11 00:17:41,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:41,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:41,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:41,154 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:17:41,155 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 23 treesize of output 19 [2021-03-11 00:17:41,160 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:41,516 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-11 00:17:41,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:41,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:41,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:41,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:41,553 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 00:17:41,566 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:41,920 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:17:41,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:41,933 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 00:17:41,933 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:317, output treesize:184 [2021-03-11 00:17:42,301 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:17:42,589 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:17:42,659 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 00:17:42,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:42,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:17:42,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983505046] [2021-03-11 00:17:42,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:17:42,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:42,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:17:42,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:17:42,660 INFO L87 Difference]: Start difference. First operand 1948 states and 6627 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 00:17:42,984 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2021-03-11 00:17:43,551 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2021-03-11 00:17:43,886 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2021-03-11 00:17:44,203 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-11 00:17:44,401 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:17:44,933 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-03-11 00:17:45,509 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2021-03-11 00:17:45,698 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:17:46,088 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-03-11 00:17:46,699 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:17:47,856 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-03-11 00:17:49,804 WARN L205 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2021-03-11 00:17:50,200 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:17:50,950 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-03-11 00:17:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:51,380 INFO L93 Difference]: Finished difference Result 2625 states and 8640 transitions. [2021-03-11 00:17:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:17:51,383 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 00:17:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:51,387 INFO L225 Difference]: With dead ends: 2625 [2021-03-11 00:17:51,388 INFO L226 Difference]: Without dead ends: 2595 [2021-03-11 00:17:51,388 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 9771.5ms TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:17:51,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2021-03-11 00:17:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 1935. [2021-03-11 00:17:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1934 states have (on average 3.4012409513960704) internal successors, (6578), 1934 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 6578 transitions. [2021-03-11 00:17:51,412 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 6578 transitions. Word has length 26 [2021-03-11 00:17:51,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:51,412 INFO L480 AbstractCegarLoop]: Abstraction has 1935 states and 6578 transitions. [2021-03-11 00:17:51,412 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 00:17:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 6578 transitions. [2021-03-11 00:17:51,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:17:51,415 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:51,415 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 00:17:51,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2580,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:51,615 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:51,615 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 36 times [2021-03-11 00:17:51,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:51,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098423529] [2021-03-11 00:17:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:51,985 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-03-11 00:17:52,206 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-03-11 00:17:52,410 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-11 00:17:52,600 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-11 00:17:52,711 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 00:17:52,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098423529] [2021-03-11 00:17:52,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503899634] [2021-03-11 00:17:52,711 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 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 00:17:52,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:17:52,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:52,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:17:52,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:53,504 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:17:54,116 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-11 00:17:54,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:54,910 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:17:54,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:17:54,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:54,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:54,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:54,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 [2021-03-11 00:17:54,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:55,589 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-11 00:17:55,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:55,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:55,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:55,654 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 16 treesize of output 26 [2021-03-11 00:17:55,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:55,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:55,744 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:17:55,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:17:55,750 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:56,305 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-11 00:17:56,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:56,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:56,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:56,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 [2021-03-11 00:17:56,377 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:56,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:56,438 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:17:56,438 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 28 treesize of output 24 [2021-03-11 00:17:56,443 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:56,969 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-11 00:17:56,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:56,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:57,050 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:17:57,050 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 21 treesize of output 25 [2021-03-11 00:17:57,062 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:57,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:57,131 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:17:57,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:17:57,135 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:57,637 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-11 00:17:57,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:57,688 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 00:17:57,688 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:365 [2021-03-11 00:17:58,577 WARN L205 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-11 00:17:58,888 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:17:58,918 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 00:17:58,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:58,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:17:58,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957652913] [2021-03-11 00:17:58,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:17:58,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:58,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:17:58,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:17:58,919 INFO L87 Difference]: Start difference. First operand 1935 states and 6578 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 00:17:59,754 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-03-11 00:18:00,130 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-11 00:18:00,703 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 32 [2021-03-11 00:18:00,880 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:18:01,186 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-11 00:18:01,621 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-11 00:18:02,542 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-11 00:18:02,955 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-11 00:18:03,606 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 41 [2021-03-11 00:18:04,086 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:18:04,622 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2021-03-11 00:18:05,868 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-03-11 00:18:06,570 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-11 00:18:07,361 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-03-11 00:18:08,074 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-11 00:18:08,850 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2021-03-11 00:18:09,892 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2021-03-11 00:18:11,290 WARN L205 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-03-11 00:18:11,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:11,462 INFO L93 Difference]: Finished difference Result 2627 states and 8594 transitions. [2021-03-11 00:18:11,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:18:11,465 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 00:18:11,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:11,470 INFO L225 Difference]: With dead ends: 2627 [2021-03-11 00:18:11,470 INFO L226 Difference]: Without dead ends: 2587 [2021-03-11 00:18:11,470 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 12901.2ms TimeCoverageRelationStatistics Valid=303, Invalid=1767, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:18:11,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-03-11 00:18:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1944. [2021-03-11 00:18:11,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1943 states have (on average 3.4040144107050954) internal successors, (6614), 1943 states have internal predecessors, (6614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 6614 transitions. [2021-03-11 00:18:11,504 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 6614 transitions. Word has length 26 [2021-03-11 00:18:11,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:11,504 INFO L480 AbstractCegarLoop]: Abstraction has 1944 states and 6614 transitions. [2021-03-11 00:18:11,504 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 00:18:11,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 6614 transitions. [2021-03-11 00:18:11,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:18:11,507 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:11,507 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 00:18:11,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2595,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:11,721 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:11,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:11,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1571862210, now seen corresponding path program 37 times [2021-03-11 00:18:11,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:11,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120015806] [2021-03-11 00:18:11,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:12,183 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-11 00:18:12,343 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-11 00:18:12,496 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-11 00:18:12,711 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 00:18:12,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120015806] [2021-03-11 00:18:12,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789654383] [2021-03-11 00:18:12,712 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 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 00:18:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:12,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:18:12,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:13,358 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:18:13,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:13,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:13,704 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 00:18:13,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:13,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:13,758 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:18:13,758 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 21 treesize of output 17 [2021-03-11 00:18:13,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:13,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:13,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:13,810 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 00:18:13,824 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:13,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:13,872 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:18:13,873 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 00:18:13,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:13,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:13,912 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:18:13,913 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 00:18:13,916 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:13,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:13,948 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:18:13,949 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 00:18:13,952 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:13,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:13,983 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:18:13,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:18:13,987 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:13,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:14,019 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:18:14,019 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 26 treesize of output 16 [2021-03-11 00:18:14,022 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:14,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:14,070 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:18:14,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:18:14,077 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:14,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:14,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:14,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:18:14,131 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:14,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:14,164 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:18:14,164 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 00:18:14,167 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:14,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:14,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:14,215 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 00:18:14,221 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:14,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:14,254 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:18:14,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:18:14,258 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:14,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:14,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:14,299 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 00:18:14,313 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:14,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:14,345 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:18:14,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:18:14,348 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:14,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:14,366 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:18:14,366 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 28 treesize of output 16 [2021-03-11 00:18:14,369 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:14,695 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:18:14,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:14,706 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 00:18:14,706 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:174 [2021-03-11 00:18:15,049 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:18:15,320 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:18:15,389 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 00:18:15,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:15,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:18:15,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920625679] [2021-03-11 00:18:15,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:18:15,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:15,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:18:15,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:18:15,390 INFO L87 Difference]: Start difference. First operand 1944 states and 6614 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 00:18:15,554 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-03-11 00:18:15,974 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-03-11 00:18:16,139 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-03-11 00:18:16,892 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-11 00:18:17,257 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:18:17,756 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-03-11 00:18:18,296 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:18:19,100 WARN L205 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-11 00:18:19,591 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-11 00:18:19,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:19,812 INFO L93 Difference]: Finished difference Result 2697 states and 8928 transitions. [2021-03-11 00:18:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:18:19,815 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 00:18:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:19,820 INFO L225 Difference]: With dead ends: 2697 [2021-03-11 00:18:19,820 INFO L226 Difference]: Without dead ends: 2672 [2021-03-11 00:18:19,820 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 5332.4ms TimeCoverageRelationStatistics Valid=228, Invalid=828, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:18:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-03-11 00:18:19,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 1935. [2021-03-11 00:18:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1934 states have (on average 3.4012409513960704) internal successors, (6578), 1934 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 6578 transitions. [2021-03-11 00:18:19,853 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 6578 transitions. Word has length 26 [2021-03-11 00:18:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:19,854 INFO L480 AbstractCegarLoop]: Abstraction has 1935 states and 6578 transitions. [2021-03-11 00:18:19,854 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 00:18:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 6578 transitions. [2021-03-11 00:18:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:18:19,856 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:19,856 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 00:18:20,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2665 [2021-03-11 00:18:20,056 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:20,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:20,057 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 38 times [2021-03-11 00:18:20,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:20,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387687698] [2021-03-11 00:18:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:20,516 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-03-11 00:18:20,674 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-03-11 00:18:20,947 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-11 00:18:21,044 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 00:18:21,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387687698] [2021-03-11 00:18:21,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376122476] [2021-03-11 00:18:21,044 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 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 00:18:21,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:18:21,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:21,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:18:21,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:21,875 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:18:22,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:22,505 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:18:22,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:18:22,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:22,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:22,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:22,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:18:22,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:23,084 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:18:23,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:23,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:23,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:23,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:18:23,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:23,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:23,231 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:18:23,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:18:23,236 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:24,267 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-03-11 00:18:24,268 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-03-11 00:18:24,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:24,355 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:18:24,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:18:24,368 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:24,446 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:18:24,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:18:24,451 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:24,951 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-11 00:18:24,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:24,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:25,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:25,020 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 33 treesize of output 35 [2021-03-11 00:18:25,032 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:25,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:25,104 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:18:25,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:18:25,108 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:26,051 WARN L205 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-11 00:18:26,052 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-03-11 00:18:26,095 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 00:18:26,095 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:253 [2021-03-11 00:18:26,880 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-11 00:18:27,164 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:18:27,226 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 00:18:27,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:27,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-11 00:18:27,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319081151] [2021-03-11 00:18:27,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:18:27,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:27,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:18:27,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:18:27,227 INFO L87 Difference]: Start difference. First operand 1935 states and 6578 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 00:18:27,690 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-03-11 00:18:28,037 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-03-11 00:18:28,460 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:18:28,822 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-11 00:18:29,263 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:18:29,883 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-11 00:18:30,673 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-03-11 00:18:30,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:30,828 INFO L93 Difference]: Finished difference Result 2142 states and 7177 transitions. [2021-03-11 00:18:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:18:30,831 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 00:18:30,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:30,835 INFO L225 Difference]: With dead ends: 2142 [2021-03-11 00:18:30,835 INFO L226 Difference]: Without dead ends: 2117 [2021-03-11 00:18:30,836 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 5142.8ms TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:18:30,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-03-11 00:18:30,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1917. [2021-03-11 00:18:30,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1916 states have (on average 3.405010438413361) internal successors, (6524), 1916 states have internal predecessors, (6524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 6524 transitions. [2021-03-11 00:18:30,858 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 6524 transitions. Word has length 26 [2021-03-11 00:18:30,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:30,858 INFO L480 AbstractCegarLoop]: Abstraction has 1917 states and 6524 transitions. [2021-03-11 00:18:30,858 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 00:18:30,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 6524 transitions. [2021-03-11 00:18:30,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:18:30,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:30,860 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 00:18:31,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2702 [2021-03-11 00:18:31,061 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:31,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 39 times [2021-03-11 00:18:31,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:31,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759372321] [2021-03-11 00:18:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:31,516 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-11 00:18:31,761 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-11 00:18:31,958 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 17 [2021-03-11 00:18:32,107 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 00:18:32,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759372321] [2021-03-11 00:18:32,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405251589] [2021-03-11 00:18:32,107 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 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 00:18:32,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:18:32,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:32,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:18:32,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:32,742 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:18:33,274 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-03-11 00:18:33,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:33,978 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:18:33,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:18:33,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:34,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:34,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:34,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:18:34,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:35,139 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-03-11 00:18:35,140 INFO L628 ElimStorePlain]: treesize reduction 12, result has 96.7 percent of original size [2021-03-11 00:18:35,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:35,220 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:18:35,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:18:35,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:35,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:35,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:35,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:18:35,304 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:35,846 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-11 00:18:35,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:35,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:35,933 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:18:35,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:18:35,937 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:35,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:35,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:35,994 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 33 treesize of output 35 [2021-03-11 00:18:36,007 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:37,048 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-03-11 00:18:37,050 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.4 percent of original size [2021-03-11 00:18:37,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:37,137 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:18:37,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:18:37,151 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:37,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:37,231 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:18:37,231 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:18:37,236 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:37,756 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-11 00:18:37,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:37,798 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 00:18:37,799 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:381, output treesize:277 [2021-03-11 00:18:38,648 WARN L205 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-11 00:18:38,949 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:18:39,024 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 00:18:39,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:39,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:18:39,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321825864] [2021-03-11 00:18:39,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:18:39,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:39,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:18:39,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:18:39,025 INFO L87 Difference]: Start difference. First operand 1917 states and 6524 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 00:18:40,185 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-03-11 00:18:40,867 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-03-11 00:18:41,384 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:18:41,731 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:18:42,532 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:18:42,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:42,695 INFO L93 Difference]: Finished difference Result 2427 states and 8111 transitions. [2021-03-11 00:18:42,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:18:42,698 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 00:18:42,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:42,702 INFO L225 Difference]: With dead ends: 2427 [2021-03-11 00:18:42,702 INFO L226 Difference]: Without dead ends: 2402 [2021-03-11 00:18:42,702 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 5548.5ms TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:18:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-03-11 00:18:42,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1906. [2021-03-11 00:18:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.4031496062992126) internal successors, (6483), 1905 states have internal predecessors, (6483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:42,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6483 transitions. [2021-03-11 00:18:42,726 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6483 transitions. Word has length 26 [2021-03-11 00:18:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:42,726 INFO L480 AbstractCegarLoop]: Abstraction has 1906 states and 6483 transitions. [2021-03-11 00:18:42,726 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 00:18:42,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6483 transitions. [2021-03-11 00:18:42,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:18:42,728 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:42,728 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 00:18:42,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2760 [2021-03-11 00:18:42,929 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:42,929 INFO L82 PathProgramCache]: Analyzing trace with hash 518793590, now seen corresponding path program 40 times [2021-03-11 00:18:42,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:42,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645584206] [2021-03-11 00:18:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:43,361 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-03-11 00:18:43,598 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-03-11 00:18:43,890 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-11 00:18:44,165 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-03-11 00:18:44,225 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 00:18:44,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645584206] [2021-03-11 00:18:44,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450118596] [2021-03-11 00:18:44,226 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 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 00:18:44,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:18:44,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:44,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:18:44,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:44,876 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:18:45,687 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-11 00:18:46,570 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 67 [2021-03-11 00:18:46,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:46,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:18:46,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:18:46,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:18:46,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:46,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:46,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:18:46,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:18:46,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:47,464 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-11 00:18:47,465 INFO L628 ElimStorePlain]: treesize reduction 55, result has 68.4 percent of original size [2021-03-11 00:18:47,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:47,476 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 00:18:47,480 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:47,719 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:18:47,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:47,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:47,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:47,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:18:47,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:18:47,740 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:47,923 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:18:47,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:47,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:18:47,930 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:215, output treesize:51 [2021-03-11 00:18:48,080 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-11 00:18:48,134 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 00:18:48,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:48,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:18:48,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564390728] [2021-03-11 00:18:48,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:18:48,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:48,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:18:48,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:18:48,135 INFO L87 Difference]: Start difference. First operand 1906 states and 6483 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 00:18:48,352 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-03-11 00:18:48,959 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-11 00:18:49,904 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-11 00:18:50,061 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:18:50,439 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-11 00:18:50,765 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-11 00:18:51,270 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:18:52,063 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-11 00:18:53,728 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 116 DAG size of output: 95 [2021-03-11 00:18:54,310 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-03-11 00:18:54,820 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:18:54,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:54,900 INFO L93 Difference]: Finished difference Result 2670 states and 8741 transitions. [2021-03-11 00:18:54,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:18:54,903 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 00:18:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:54,908 INFO L225 Difference]: With dead ends: 2670 [2021-03-11 00:18:54,908 INFO L226 Difference]: Without dead ends: 2625 [2021-03-11 00:18:54,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 8085.8ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:18:54,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-03-11 00:18:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1911. [2021-03-11 00:18:54,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.4078534031413614) internal successors, (6509), 1910 states have internal predecessors, (6509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6509 transitions. [2021-03-11 00:18:54,941 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6509 transitions. Word has length 26 [2021-03-11 00:18:54,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:54,941 INFO L480 AbstractCegarLoop]: Abstraction has 1911 states and 6509 transitions. [2021-03-11 00:18:54,941 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 00:18:54,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6509 transitions. [2021-03-11 00:18:54,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:18:54,944 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:54,944 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 00:18:55,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2817,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:55,144 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:55,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1098739190, now seen corresponding path program 41 times [2021-03-11 00:18:55,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:55,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568122996] [2021-03-11 00:18:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:55,827 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2021-03-11 00:18:56,323 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-11 00:18:56,580 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:18:56,813 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 00:18:56,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568122996] [2021-03-11 00:18:56,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463054164] [2021-03-11 00:18:56,813 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 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 00:18:56,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:18:56,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:56,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:18:56,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:57,571 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:18:58,466 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-11 00:18:58,604 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_366, v_prenex_369, v_prenex_359], 3=[v_prenex_360, v_prenex_361, v_prenex_363, v_prenex_364]} [2021-03-11 00:18:58,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:58,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:58,639 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 00:18:58,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:59,110 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-11 00:18:59,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:59,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:59,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:59,155 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 33 treesize of output 27 [2021-03-11 00:18:59,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:59,683 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-11 00:18:59,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:59,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:59,728 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:18:59,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:18:59,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:00,224 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-11 00:19:00,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:00,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:00,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:00,265 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 00:19:00,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:00,762 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-11 00:19:00,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:00,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:00,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:00,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:00,805 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 00:19:00,820 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:01,286 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-03-11 00:19:01,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:01,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:01,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:01,332 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:19:01,332 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 00:19:01,339 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:01,790 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-11 00:19:01,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:01,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:01,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:01,829 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:19:01,829 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 00:19:01,834 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:02,191 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-11 00:19:02,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:02,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:02,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:02,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:02,224 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 26 [2021-03-11 00:19:02,237 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:02,599 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:19:02,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:02,612 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 00:19:02,612 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:329, output treesize:194 [2021-03-11 00:19:02,972 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:19:03,256 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:19:03,325 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 00:19:03,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:03,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:19:03,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288259867] [2021-03-11 00:19:03,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:19:03,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:03,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:19:03,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:19:03,326 INFO L87 Difference]: Start difference. First operand 1911 states and 6509 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 00:19:03,540 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-03-11 00:19:03,785 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:19:04,203 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-11 00:19:04,957 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-03-11 00:19:05,392 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-03-11 00:19:05,964 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:19:06,764 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-11 00:19:08,122 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-03-11 00:19:08,551 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:19:09,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:09,060 INFO L93 Difference]: Finished difference Result 2475 states and 8242 transitions. [2021-03-11 00:19:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:19:09,063 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 00:19:09,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:09,066 INFO L225 Difference]: With dead ends: 2475 [2021-03-11 00:19:09,066 INFO L226 Difference]: Without dead ends: 2456 [2021-03-11 00:19:09,067 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 7737.2ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:19:09,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-03-11 00:19:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 1892. [2021-03-11 00:19:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.401374933897409) internal successors, (6432), 1891 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:09,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6432 transitions. [2021-03-11 00:19:09,100 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6432 transitions. Word has length 26 [2021-03-11 00:19:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:09,100 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 6432 transitions. [2021-03-11 00:19:09,100 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 00:19:09,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6432 transitions. [2021-03-11 00:19:09,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:19:09,102 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:09,102 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 00:19:09,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2829,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:09,303 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:09,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:09,303 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 42 times [2021-03-11 00:19:09,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:09,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107422282] [2021-03-11 00:19:09,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:09,621 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-03-11 00:19:09,772 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-03-11 00:19:09,960 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-03-11 00:19:10,135 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-11 00:19:10,276 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2021-03-11 00:19:10,279 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 00:19:10,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107422282] [2021-03-11 00:19:10,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119599403] [2021-03-11 00:19:10,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:19:10,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:19:10,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:10,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:19:10,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:11,083 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:19:11,699 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:19:12,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:12,485 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:19:12,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:19:12,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:12,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:12,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:12,543 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 33 treesize of output 35 [2021-03-11 00:19:12,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:13,092 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:19:13,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:13,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:13,177 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:19:13,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:19:13,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:13,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:13,259 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:19:13,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:19:13,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:13,807 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-11 00:19:13,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:13,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:13,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:13,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:19:13,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:13,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:13,948 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:19:13,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:19:13,954 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:14,459 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-11 00:19:14,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:14,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:14,542 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:19:14,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:19:14,556 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:14,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:14,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:14,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 [2021-03-11 00:19:14,614 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:15,077 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:19:15,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:15,127 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 00:19:15,127 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:329 [2021-03-11 00:19:15,969 WARN L205 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:19:16,281 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:19:16,310 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 00:19:16,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:16,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:19:16,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364721634] [2021-03-11 00:19:16,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:19:16,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:16,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:19:16,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:19:16,311 INFO L87 Difference]: Start difference. First operand 1892 states and 6432 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 00:19:16,699 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-03-11 00:19:17,057 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-11 00:19:17,637 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-03-11 00:19:18,008 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-11 00:19:18,564 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 35 [2021-03-11 00:19:19,243 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-03-11 00:19:19,974 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-03-11 00:19:20,657 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2021-03-11 00:19:21,465 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2021-03-11 00:19:21,909 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:19:22,363 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:19:23,318 WARN L205 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2021-03-11 00:19:23,926 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-11 00:19:25,423 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2021-03-11 00:19:25,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:25,504 INFO L93 Difference]: Finished difference Result 2514 states and 8295 transitions. [2021-03-11 00:19:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:19:25,507 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 00:19:25,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:25,510 INFO L225 Difference]: With dead ends: 2514 [2021-03-11 00:19:25,511 INFO L226 Difference]: Without dead ends: 2484 [2021-03-11 00:19:25,511 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 10584.1ms TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:19:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-03-11 00:19:25,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1937. [2021-03-11 00:19:25,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 3.396694214876033) internal successors, (6576), 1936 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 6576 transitions. [2021-03-11 00:19:25,533 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 6576 transitions. Word has length 26 [2021-03-11 00:19:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:25,533 INFO L480 AbstractCegarLoop]: Abstraction has 1937 states and 6576 transitions. [2021-03-11 00:19:25,533 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 00:19:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 6576 transitions. [2021-03-11 00:19:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:19:25,535 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:25,535 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 00:19:25,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2845,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:25,736 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:25,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:25,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1930035334, now seen corresponding path program 43 times [2021-03-11 00:19:25,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:25,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954771684] [2021-03-11 00:19:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:26,089 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-11 00:19:26,253 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-11 00:19:26,563 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 00:19:26,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954771684] [2021-03-11 00:19:26,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891520956] [2021-03-11 00:19:26,563 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 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 00:19:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:26,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:19:26,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:27,050 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:19:27,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:27,804 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:27,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:19:27,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:27,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:27,840 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:27,840 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 00:19:27,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:27,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:27,874 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:27,874 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 00:19:27,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:27,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:27,922 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:19:27,922 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 00:19:27,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:27,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:27,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:27,970 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 40 treesize of output 32 [2021-03-11 00:19:27,977 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:27,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,009 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,009 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 15 [2021-03-11 00:19:28,012 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:28,056 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 40 treesize of output 32 [2021-03-11 00:19:28,059 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,094 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,094 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 21 [2021-03-11 00:19:28,097 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,134 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,134 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 1 [2021-03-11 00:19:28,137 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,170 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,170 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 00:19:28,173 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,206 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 21 [2021-03-11 00:19:28,209 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,242 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,242 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 00:19:28,245 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,287 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,288 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 21 [2021-03-11 00:19:28,291 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,335 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:19:28,336 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 00:19:28,341 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,376 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,376 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 00:19:28,380 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:28,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:19:28,447 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,478 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,478 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 18 [2021-03-11 00:19:28,481 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:28,523 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 27 [2021-03-11 00:19:28,527 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,563 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-03-11 00:19:28,566 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,599 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:19:28,602 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,637 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,637 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 21 [2021-03-11 00:19:28,640 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-11 00:19:28,651 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,688 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-03-11 00:19:28,691 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,724 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,724 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 00:19:28,727 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,760 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,760 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 18 [2021-03-11 00:19:28,763 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,796 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 18 [2021-03-11 00:19:28,800 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,832 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,832 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 00:19:28,836 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,883 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:19:28,884 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 25 [2021-03-11 00:19:28,888 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,921 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 21 [2021-03-11 00:19:28,924 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,957 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,957 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 00:19:28,960 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:28,993 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:19:28,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-03-11 00:19:28,997 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:29,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:29,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:29,026 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 35 treesize of output 29 [2021-03-11 00:19:29,040 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:29,722 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-03-11 00:19:29,723 INFO L628 ElimStorePlain]: treesize reduction 102, result has 67.6 percent of original size [2021-03-11 00:19:29,733 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 00:19:29,733 INFO L247 ElimStorePlain]: Needed 33 recursive calls to eliminate 2 variables, input treesize:1449, output treesize:182 [2021-03-11 00:19:30,078 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:19:30,366 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-11 00:19:30,438 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 00:19:30,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:30,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:19:30,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163964597] [2021-03-11 00:19:30,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:19:30,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:30,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:19:30,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:19:30,438 INFO L87 Difference]: Start difference. First operand 1937 states and 6576 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 00:19:30,622 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-03-11 00:19:31,158 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-03-11 00:19:31,920 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:19:32,422 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-03-11 00:19:32,968 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:19:33,806 WARN L205 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-11 00:19:34,217 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-03-11 00:19:34,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:34,462 INFO L93 Difference]: Finished difference Result 2649 states and 8796 transitions. [2021-03-11 00:19:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:19:34,465 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 00:19:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:34,469 INFO L225 Difference]: With dead ends: 2649 [2021-03-11 00:19:34,469 INFO L226 Difference]: Without dead ends: 2634 [2021-03-11 00:19:34,469 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 4623.8ms TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:19:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-03-11 00:19:34,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 1938. [2021-03-11 00:19:34,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 3.398038203407331) internal successors, (6582), 1937 states have internal predecessors, (6582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 6582 transitions. [2021-03-11 00:19:34,493 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 6582 transitions. Word has length 26 [2021-03-11 00:19:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:34,493 INFO L480 AbstractCegarLoop]: Abstraction has 1938 states and 6582 transitions. [2021-03-11 00:19:34,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 00:19:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 6582 transitions. [2021-03-11 00:19:34,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:19:34,495 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:34,495 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 00:19:34,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2909 [2021-03-11 00:19:34,696 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:34,696 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 44 times [2021-03-11 00:19:34,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:34,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831176423] [2021-03-11 00:19:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:35,065 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-11 00:19:35,261 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-11 00:19:35,497 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-11 00:19:35,704 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-03-11 00:19:35,896 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 13 [2021-03-11 00:19:35,899 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 00:19:35,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831176423] [2021-03-11 00:19:35,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672257259] [2021-03-11 00:19:35,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:19:35,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:19:35,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:35,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:19:35,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:36,582 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:19:37,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:37,253 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:19:37,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:19:37,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:37,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:37,338 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:19:37,338 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 21 treesize of output 25 [2021-03-11 00:19:37,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:37,932 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-11 00:19:37,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:37,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:38,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:38,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 [2021-03-11 00:19:38,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:38,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:38,102 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:19:38,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 [2021-03-11 00:19:38,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:39,252 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-03-11 00:19:39,254 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-03-11 00:19:39,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:39,332 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:19:39,333 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 21 treesize of output 21 [2021-03-11 00:19:39,338 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:39,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:39,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:39,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:19:39,411 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:39,943 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:19:39,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:39,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:40,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:40,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 34 [2021-03-11 00:19:40,032 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:40,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:40,096 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:19:40,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 [2021-03-11 00:19:40,101 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:41,114 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-03-11 00:19:41,115 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-03-11 00:19:41,155 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 00:19:41,155 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:389, output treesize:298 [2021-03-11 00:19:42,137 WARN L205 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-03-11 00:19:42,442 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-03-11 00:19:42,499 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 00:19:42,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:42,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:19:42,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059138038] [2021-03-11 00:19:42,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:19:42,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:42,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:19:42,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:19:42,500 INFO L87 Difference]: Start difference. First operand 1938 states and 6582 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 00:19:44,129 WARN L205 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-03-11 00:19:44,446 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-11 00:19:44,800 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-11 00:19:45,200 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:19:46,252 WARN L205 SmtUtils]: Spent 916.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-03-11 00:19:46,766 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2021-03-11 00:19:46,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:46,846 INFO L93 Difference]: Finished difference Result 2483 states and 8296 transitions. [2021-03-11 00:19:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:19:46,849 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 00:19:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:46,853 INFO L225 Difference]: With dead ends: 2483 [2021-03-11 00:19:46,853 INFO L226 Difference]: Without dead ends: 2468 [2021-03-11 00:19:46,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 6551.8ms TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:19:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2021-03-11 00:19:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 1941. [2021-03-11 00:19:46,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 3.4010309278350515) internal successors, (6598), 1940 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 6598 transitions. [2021-03-11 00:19:46,875 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 6598 transitions. Word has length 26 [2021-03-11 00:19:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:46,875 INFO L480 AbstractCegarLoop]: Abstraction has 1941 states and 6598 transitions. [2021-03-11 00:19:46,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 00:19:46,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 6598 transitions. [2021-03-11 00:19:46,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:19:46,877 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:46,877 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 00:19:47,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3000 [2021-03-11 00:19:47,078 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:47,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 45 times [2021-03-11 00:19:47,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:47,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684104363] [2021-03-11 00:19:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:47,408 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-03-11 00:19:47,775 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-11 00:19:47,920 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-11 00:19:48,131 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 00:19:48,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684104363] [2021-03-11 00:19:48,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036203912] [2021-03-11 00:19:48,131 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 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 00:19:48,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:19:48,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:48,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:19:48,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:48,768 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:19:49,077 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-11 00:19:49,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:49,823 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:19:49,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:19:49,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:49,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:49,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:49,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 [2021-03-11 00:19:49,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:51,040 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2021-03-11 00:19:51,041 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.5 percent of original size [2021-03-11 00:19:51,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:51,120 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:19:51,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:19:51,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:51,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:51,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:51,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:19:51,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:51,760 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-11 00:19:51,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:51,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:51,852 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:19:51,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:19:51,857 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:51,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:51,933 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:19:51,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:19:51,946 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:52,486 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-11 00:19:52,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:52,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:52,564 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:19:52,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:19:52,569 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:52,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:19:52,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:52,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:19:52,644 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:53,669 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-03-11 00:19:53,670 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-03-11 00:19:53,713 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 00:19:53,713 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:373, output treesize:282 [2021-03-11 00:19:54,627 WARN L205 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-11 00:19:54,935 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:19:54,994 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 00:19:54,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:54,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:19:54,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144746306] [2021-03-11 00:19:54,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:19:54,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:54,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:19:54,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:19:54,995 INFO L87 Difference]: Start difference. First operand 1941 states and 6598 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 00:19:56,241 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-03-11 00:19:56,864 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-11 00:19:57,149 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-11 00:19:57,522 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:19:58,104 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-11 00:19:58,905 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-11 00:19:59,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:59,049 INFO L93 Difference]: Finished difference Result 2513 states and 8392 transitions. [2021-03-11 00:19:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:19:59,052 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 00:19:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:59,056 INFO L225 Difference]: With dead ends: 2513 [2021-03-11 00:19:59,056 INFO L226 Difference]: Without dead ends: 2498 [2021-03-11 00:19:59,056 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 5523.5ms TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:19:59,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-03-11 00:19:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 1959. [2021-03-11 00:19:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1958 states have (on average 3.397344228804903) internal successors, (6652), 1958 states have internal predecessors, (6652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 6652 transitions. [2021-03-11 00:19:59,079 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 6652 transitions. Word has length 26 [2021-03-11 00:19:59,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:59,079 INFO L480 AbstractCegarLoop]: Abstraction has 1959 states and 6652 transitions. [2021-03-11 00:19:59,079 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 00:19:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 6652 transitions. [2021-03-11 00:19:59,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:19:59,082 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:59,082 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 00:19:59,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3063,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:59,282 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:59,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:59,282 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 46 times [2021-03-11 00:19:59,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:59,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435714640] [2021-03-11 00:19:59,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:59,703 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-03-11 00:20:00,167 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-03-11 00:20:00,433 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-11 00:20:00,702 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-11 00:20:00,811 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 00:20:00,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435714640] [2021-03-11 00:20:00,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40985356] [2021-03-11 00:20:00,811 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 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 00:20:00,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:20:00,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:00,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:20:00,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:01,378 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:20:01,685 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:20:01,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:01,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:01,848 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:20:01,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:20:01,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:01,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:01,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:01,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:01,910 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 00:20:01,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:01,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:01,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:01,967 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:20:01,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:20:01,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:02,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:02,039 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 31 [2021-03-11 00:20:02,043 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,087 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:20:02,087 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 00:20:02,091 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:02,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,146 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:20:02,147 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 24 [2021-03-11 00:20:02,152 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:02,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:02,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 30 [2021-03-11 00:20:02,211 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:02,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,252 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:20:02,252 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 25 [2021-03-11 00:20:02,256 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:02,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,299 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:20:02,299 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 50 treesize of output 30 [2021-03-11 00:20:02,303 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:02,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,339 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:20:02,340 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 00:20:02,343 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:02,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,379 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:20:02,379 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 40 treesize of output 22 [2021-03-11 00:20:02,382 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:02,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:02,432 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 00:20:02,447 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:02,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,500 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:20:02,501 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 00:20:02,507 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:02,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,547 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:20:02,547 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 00:20:02,551 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:02,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:02,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:20:02,613 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:02,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:02,647 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:20:02,647 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 00:20:02,653 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:03,018 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:20:03,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:03,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:20:03,023 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-03-11 00:20:03,457 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:20:03,812 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-11 00:20:03,869 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 00:20:03,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:03,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:20:03,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994227802] [2021-03-11 00:20:03,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:20:03,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:03,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:20:03,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:20:03,870 INFO L87 Difference]: Start difference. First operand 1959 states and 6652 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 00:20:04,226 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-03-11 00:20:04,533 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:20:05,093 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-03-11 00:20:05,726 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:20:05,933 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-03-11 00:20:06,269 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-03-11 00:20:06,720 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2021-03-11 00:20:07,450 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-03-11 00:20:07,981 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-03-11 00:20:08,419 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:20:09,010 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-03-11 00:20:10,076 WARN L205 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-11 00:20:11,426 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2021-03-11 00:20:11,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:11,970 INFO L93 Difference]: Finished difference Result 2496 states and 8344 transitions. [2021-03-11 00:20:11,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:20:11,973 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 00:20:11,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:11,977 INFO L225 Difference]: With dead ends: 2496 [2021-03-11 00:20:11,977 INFO L226 Difference]: Without dead ends: 2481 [2021-03-11 00:20:11,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 8560.2ms TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:20:11,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-03-11 00:20:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1977. [2021-03-11 00:20:11,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1976 states have (on average 3.395242914979757) internal successors, (6709), 1976 states have internal predecessors, (6709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:12,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 6709 transitions. [2021-03-11 00:20:12,002 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 6709 transitions. Word has length 26 [2021-03-11 00:20:12,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:12,002 INFO L480 AbstractCegarLoop]: Abstraction has 1977 states and 6709 transitions. [2021-03-11 00:20:12,002 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 00:20:12,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 6709 transitions. [2021-03-11 00:20:12,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:20:12,005 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:12,005 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 00:20:12,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3124,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:12,206 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:12,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:12,206 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-03-11 00:20:12,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:12,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423399894] [2021-03-11 00:20:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:12,679 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-03-11 00:20:13,084 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-11 00:20:13,266 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-11 00:20:13,519 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 00:20:13,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423399894] [2021-03-11 00:20:13,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924087698] [2021-03-11 00:20:13,519 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 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 00:20:13,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:20:13,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:13,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:20:13,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:14,292 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:20:15,033 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-03-11 00:20:15,393 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_402], 3=[v_prenex_404, A, v_prenex_403]} [2021-03-11 00:20:15,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:15,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:15,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:20:15,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:15,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:15,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:15,483 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 33 treesize of output 27 [2021-03-11 00:20:15,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:16,107 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-11 00:20:16,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:16,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:16,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:16,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:16,188 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 26 [2021-03-11 00:20:16,193 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:16,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:16,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:16,237 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:20:16,237 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 23 treesize of output 19 [2021-03-11 00:20:16,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:16,816 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-11 00:20:16,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:16,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:16,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:16,876 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:20:16,876 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 00:20:16,882 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:16,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:16,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:16,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:16,923 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 26 [2021-03-11 00:20:16,939 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:17,432 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-11 00:20:17,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:17,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:17,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:17,483 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:20:17,483 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 25 treesize of output 19 [2021-03-11 00:20:17,489 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:17,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:17,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:17,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:17,518 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 00:20:17,533 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:17,985 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-11 00:20:17,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:18,000 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 00:20:18,001 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:387, output treesize:208 [2021-03-11 00:20:18,459 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:20:18,775 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-11 00:20:18,874 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 00:20:18,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:18,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:20:18,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304670507] [2021-03-11 00:20:18,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:20:18,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:18,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:20:18,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:20:18,874 INFO L87 Difference]: Start difference. First operand 1977 states and 6709 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 00:20:19,533 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-03-11 00:20:20,060 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:20:20,364 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-11 00:20:20,905 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:20:21,303 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-11 00:20:22,086 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:20:22,964 WARN L205 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2021-03-11 00:20:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:23,240 INFO L93 Difference]: Finished difference Result 2549 states and 8489 transitions. [2021-03-11 00:20:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:20:23,243 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 00:20:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:23,246 INFO L225 Difference]: With dead ends: 2549 [2021-03-11 00:20:23,246 INFO L226 Difference]: Without dead ends: 2524 [2021-03-11 00:20:23,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 5948.3ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:20:23,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-03-11 00:20:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 1981. [2021-03-11 00:20:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 3.3954545454545455) internal successors, (6723), 1980 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 6723 transitions. [2021-03-11 00:20:23,268 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 6723 transitions. Word has length 26 [2021-03-11 00:20:23,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:23,268 INFO L480 AbstractCegarLoop]: Abstraction has 1981 states and 6723 transitions. [2021-03-11 00:20:23,268 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 00:20:23,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 6723 transitions. [2021-03-11 00:20:23,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:20:23,271 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:23,271 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 00:20:23,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3142 [2021-03-11 00:20:23,473 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:23,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:23,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-03-11 00:20:23,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:23,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232766307] [2021-03-11 00:20:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:23,928 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-11 00:20:24,259 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-11 00:20:24,472 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-11 00:20:24,713 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 00:20:24,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232766307] [2021-03-11 00:20:24,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773959170] [2021-03-11 00:20:24,714 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 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 00:20:24,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:20:24,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:24,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:20:24,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:25,431 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:20:25,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:25,543 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:20:25,544 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 00:20:25,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:25,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:25,578 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:20:25,578 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 00:20:25,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:25,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:25,613 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:20:25,614 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 00:20:25,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:25,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:25,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:25,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:20:25,669 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:25,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:25,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:25,715 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 00:20:25,730 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:25,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:25,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:25,777 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 00:20:25,781 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:25,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:25,814 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:20:25,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:20:25,817 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:25,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:25,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:25,864 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 00:20:25,880 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:25,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:25,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:25,927 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 00:20:25,932 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:25,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:25,968 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:20:25,968 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 36 treesize of output 22 [2021-03-11 00:20:25,972 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:25,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:26,007 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:20:26,008 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 00:20:26,011 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:26,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:26,045 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:20:26,045 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 00:20:26,049 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:26,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:26,099 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:20:26,100 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 00:20:26,106 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:26,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:26,143 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:20:26,143 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 00:20:26,149 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:26,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:26,196 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:20:26,196 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 00:20:26,201 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:26,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:26,221 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:20:26,221 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 00:20:26,224 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:26,536 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:20:26,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:26,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:20:26,540 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-03-11 00:20:26,936 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:20:27,312 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:20:27,368 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 00:20:27,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:27,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:20:27,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304211513] [2021-03-11 00:20:27,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:20:27,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:27,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:20:27,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:20:27,369 INFO L87 Difference]: Start difference. First operand 1981 states and 6723 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 00:20:28,034 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-11 00:20:28,552 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-03-11 00:20:28,955 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2021-03-11 00:20:29,603 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-03-11 00:20:30,787 WARN L205 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-11 00:20:31,700 WARN L205 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-11 00:20:32,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:32,098 INFO L93 Difference]: Finished difference Result 2502 states and 8362 transitions. [2021-03-11 00:20:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:20:32,101 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 00:20:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:32,105 INFO L225 Difference]: With dead ends: 2502 [2021-03-11 00:20:32,106 INFO L226 Difference]: Without dead ends: 2487 [2021-03-11 00:20:32,106 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 5552.1ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:20:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-03-11 00:20:32,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1981. [2021-03-11 00:20:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 3.3954545454545455) internal successors, (6723), 1980 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:32,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 6723 transitions. [2021-03-11 00:20:32,130 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 6723 transitions. Word has length 26 [2021-03-11 00:20:32,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:32,130 INFO L480 AbstractCegarLoop]: Abstraction has 1981 states and 6723 transitions. [2021-03-11 00:20:32,130 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 00:20:32,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 6723 transitions. [2021-03-11 00:20:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:20:32,132 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:32,132 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 00:20:32,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3176 [2021-03-11 00:20:32,333 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:32,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:32,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 54 times [2021-03-11 00:20:32,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:32,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319374416] [2021-03-11 00:20:32,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:32,592 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-11 00:20:32,837 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-11 00:20:32,966 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2021-03-11 00:20:33,214 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-03-11 00:20:33,475 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-03-11 00:20:33,735 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-11 00:20:33,899 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2021-03-11 00:20:33,903 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 00:20:33,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319374416] [2021-03-11 00:20:33,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169031937] [2021-03-11 00:20:33,903 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 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 00:20:33,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:20:33,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:33,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:20:33,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:34,607 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:20:34,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:34,712 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 41 treesize of output 19 [2021-03-11 00:20:34,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:34,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:34,735 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 32 treesize of output 16 [2021-03-11 00:20:34,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:34,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:34,758 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 27 treesize of output 13 [2021-03-11 00:20:34,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:34,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:34,778 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 32 treesize of output 16 [2021-03-11 00:20:34,782 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:34,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:34,797 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 39 treesize of output 19 [2021-03-11 00:20:34,801 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:34,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:34,818 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 27 treesize of output 13 [2021-03-11 00:20:34,821 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:34,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:34,836 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 29 treesize of output 13 [2021-03-11 00:20:34,840 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:34,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:34,856 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 36 treesize of output 16 [2021-03-11 00:20:34,859 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:34,876 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 34 treesize of output 16 [2021-03-11 00:20:34,879 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:34,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:34,896 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 34 treesize of output 16 [2021-03-11 00:20:34,900 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:34,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:34,915 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 27 treesize of output 13 [2021-03-11 00:20:34,920 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:34,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:34,937 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 36 treesize of output 16 [2021-03-11 00:20:34,941 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:34,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:34,956 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 25 treesize of output 13 [2021-03-11 00:20:34,960 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:34,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:34,977 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 41 treesize of output 19 [2021-03-11 00:20:34,981 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:34,996 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 39 treesize of output 19 [2021-03-11 00:20:35,000 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:35,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:35,008 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 13 treesize of output 7 [2021-03-11 00:20:35,015 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:35,129 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2021-03-11 00:20:35,130 INFO L628 ElimStorePlain]: treesize reduction 28, result has 49.1 percent of original size [2021-03-11 00:20:35,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:20:35,132 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:633, output treesize:27 [2021-03-11 00:20:35,283 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 00:20:35,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:35,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:20:35,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127935629] [2021-03-11 00:20:35,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:20:35,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:35,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:20:35,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:20:35,284 INFO L87 Difference]: Start difference. First operand 1981 states and 6723 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:35,572 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:20:36,178 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:20:36,661 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:20:36,830 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:20:37,244 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:20:37,706 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-03-11 00:20:38,128 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-11 00:20:38,400 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-11 00:20:38,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:38,418 INFO L93 Difference]: Finished difference Result 2559 states and 8205 transitions. [2021-03-11 00:20:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:20:38,421 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:20:38,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:38,425 INFO L225 Difference]: With dead ends: 2559 [2021-03-11 00:20:38,425 INFO L226 Difference]: Without dead ends: 2522 [2021-03-11 00:20:38,425 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 4496.0ms TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:20:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2021-03-11 00:20:38,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2001. [2021-03-11 00:20:38,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 3.3945) internal successors, (6789), 2000 states have internal predecessors, (6789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:38,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 6789 transitions. [2021-03-11 00:20:38,449 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 6789 transitions. Word has length 26 [2021-03-11 00:20:38,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:38,449 INFO L480 AbstractCegarLoop]: Abstraction has 2001 states and 6789 transitions. [2021-03-11 00:20:38,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:38,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 6789 transitions. [2021-03-11 00:20:38,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:20:38,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:38,451 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 00:20:38,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3193,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:38,652 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:38,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:38,652 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 55 times [2021-03-11 00:20:38,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:38,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684195213] [2021-03-11 00:20:38,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:38,937 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-03-11 00:20:39,272 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-11 00:20:39,589 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-03-11 00:20:39,994 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-11 00:20:40,221 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-03-11 00:20:40,464 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 00:20:40,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684195213] [2021-03-11 00:20:40,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653544449] [2021-03-11 00:20:40,465 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 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 00:20:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:40,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:20:40,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:41,205 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:20:41,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:41,260 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 41 treesize of output 19 [2021-03-11 00:20:41,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:41,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:41,283 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 32 treesize of output 16 [2021-03-11 00:20:41,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:41,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:41,307 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 27 treesize of output 13 [2021-03-11 00:20:41,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:41,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:41,327 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 32 treesize of output 16 [2021-03-11 00:20:41,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:41,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:41,346 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 39 treesize of output 19 [2021-03-11 00:20:41,349 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:41,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:41,366 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 27 treesize of output 13 [2021-03-11 00:20:41,369 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:41,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:41,384 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 29 treesize of output 13 [2021-03-11 00:20:41,388 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:41,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:41,404 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 36 treesize of output 16 [2021-03-11 00:20:41,407 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:41,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:41,424 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 34 treesize of output 16 [2021-03-11 00:20:41,428 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:41,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:41,445 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 34 treesize of output 16 [2021-03-11 00:20:41,448 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:41,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:41,462 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 27 treesize of output 13 [2021-03-11 00:20:41,467 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:41,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:41,481 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 36 treesize of output 16 [2021-03-11 00:20:41,484 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:41,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:41,499 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 25 treesize of output 13 [2021-03-11 00:20:41,503 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:41,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:41,517 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 41 treesize of output 19 [2021-03-11 00:20:41,520 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:41,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:41,534 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 39 treesize of output 19 [2021-03-11 00:20:41,537 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:41,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:41,545 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 13 treesize of output 7 [2021-03-11 00:20:41,551 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:41,660 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2021-03-11 00:20:41,661 INFO L628 ElimStorePlain]: treesize reduction 28, result has 49.1 percent of original size [2021-03-11 00:20:41,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:20:41,663 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:633, output treesize:27 [2021-03-11 00:20:41,827 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 00:20:41,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:41,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:20:41,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924687550] [2021-03-11 00:20:41,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:20:41,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:41,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:20:41,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:20:41,828 INFO L87 Difference]: Start difference. First operand 2001 states and 6789 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 00:20:42,291 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 22 [2021-03-11 00:20:42,727 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-03-11 00:20:42,985 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:20:43,469 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-11 00:20:43,946 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-11 00:20:44,491 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-03-11 00:20:44,847 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-11 00:20:45,085 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2021-03-11 00:20:45,476 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:20:46,221 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-03-11 00:20:47,084 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-03-11 00:20:47,751 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-03-11 00:20:48,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:48,236 INFO L93 Difference]: Finished difference Result 2451 states and 8116 transitions. [2021-03-11 00:20:48,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:20:48,239 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 00:20:48,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:48,243 INFO L225 Difference]: With dead ends: 2451 [2021-03-11 00:20:48,243 INFO L226 Difference]: Without dead ends: 2405 [2021-03-11 00:20:48,244 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 7472.9ms TimeCoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:20:48,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-03-11 00:20:48,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2001. [2021-03-11 00:20:48,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 3.3895) internal successors, (6779), 2000 states have internal predecessors, (6779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 6779 transitions. [2021-03-11 00:20:48,265 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 6779 transitions. Word has length 26 [2021-03-11 00:20:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:48,265 INFO L480 AbstractCegarLoop]: Abstraction has 2001 states and 6779 transitions. [2021-03-11 00:20:48,265 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 00:20:48,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 6779 transitions. [2021-03-11 00:20:48,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:20:48,268 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:48,268 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 00:20:48,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3199 [2021-03-11 00:20:48,468 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:48,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:48,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 56 times [2021-03-11 00:20:48,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:48,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019819752] [2021-03-11 00:20:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:48,740 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-03-11 00:20:48,966 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-03-11 00:20:49,144 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-11 00:20:49,495 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:20:49,786 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-11 00:20:49,953 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-11 00:20:50,104 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-03-11 00:20:50,108 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 00:20:50,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019819752] [2021-03-11 00:20:50,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604472861] [2021-03-11 00:20:50,108 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 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 00:20:50,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:20:50,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:50,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:20:50,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:51,022 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:20:51,791 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-11 00:20:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:52,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:52,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:52,866 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-03-11 00:20:52,866 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 00:20:52,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:52,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:52,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:52,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:52,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:52,972 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 00:20:52,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:54,363 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 155 [2021-03-11 00:20:54,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:54,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:54,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:54,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:54,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:54,498 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 43 treesize of output 51 [2021-03-11 00:20:54,527 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:54,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:54,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:54,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:54,582 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-03-11 00:20:54,582 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 45 treesize of output 1 [2021-03-11 00:20:54,586 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:55,808 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 149 [2021-03-11 00:20:55,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:55,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:55,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:55,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:55,946 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-11 00:20:55,946 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 37 [2021-03-11 00:20:55,963 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:55,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:55,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:55,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:56,015 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-03-11 00:20:56,015 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 00:20:56,019 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:57,152 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 136 [2021-03-11 00:20:57,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:57,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:57,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:57,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:57,298 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-11 00:20:57,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 00:20:57,316 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:57,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:57,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:57,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:57,367 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-03-11 00:20:57,368 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 00:20:57,371 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:58,386 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 124 [2021-03-11 00:20:58,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:58,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:58,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:58,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:58,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:58,514 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 43 treesize of output 51 [2021-03-11 00:20:58,535 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:58,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:58,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:58,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:58,654 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-11 00:20:58,654 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 37 [2021-03-11 00:20:58,669 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:00,589 WARN L205 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 125 DAG size of output: 115 [2021-03-11 00:21:00,591 INFO L628 ElimStorePlain]: treesize reduction 54, result has 91.1 percent of original size [2021-03-11 00:21:00,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:00,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:00,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:00,762 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-11 00:21:00,763 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-03-11 00:21:00,764 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 47 [2021-03-11 00:21:00,781 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:00,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:00,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:00,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:00,904 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-11 00:21:00,904 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 34 [2021-03-11 00:21:00,923 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:01,892 WARN L205 SmtUtils]: Spent 968.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-11 00:21:01,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:01,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:01,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:01,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:02,022 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-03-11 00:21:02,023 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 30 [2021-03-11 00:21:02,030 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:02,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:02,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:02,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:02,143 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-11 00:21:02,143 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 37 [2021-03-11 00:21:02,154 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:03,033 WARN L205 SmtUtils]: Spent 878.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-03-11 00:21:03,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:03,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:03,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:03,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:03,172 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-11 00:21:03,172 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 43 treesize of output 37 [2021-03-11 00:21:03,178 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:03,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:03,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:03,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:03,270 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-03-11 00:21:03,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-03-11 00:21:03,277 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:04,122 WARN L205 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-11 00:21:04,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:04,151 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 00:21:04,151 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:889, output treesize:585 [2021-03-11 00:21:04,729 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2021-03-11 00:21:04,838 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 00:21:04,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:04,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:21:04,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916945152] [2021-03-11 00:21:04,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:21:04,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:04,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:21:04,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:21:04,839 INFO L87 Difference]: Start difference. First operand 2001 states and 6779 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 00:21:05,048 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-03-11 00:21:05,857 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-11 00:21:06,102 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-11 00:21:06,740 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-11 00:21:07,051 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-11 00:21:07,707 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:21:08,485 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:21:08,911 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-11 00:21:09,644 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-03-11 00:21:10,548 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-11 00:21:11,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:11,534 INFO L93 Difference]: Finished difference Result 2548 states and 8505 transitions. [2021-03-11 00:21:11,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:21:11,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 26 [2021-03-11 00:21:11,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:11,541 INFO L225 Difference]: With dead ends: 2548 [2021-03-11 00:21:11,541 INFO L226 Difference]: Without dead ends: 2533 [2021-03-11 00:21:11,542 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 7144.2ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:21:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-03-11 00:21:11,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2016. [2021-03-11 00:21:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 3.3955334987593053) internal successors, (6842), 2015 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:11,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 6842 transitions. [2021-03-11 00:21:11,564 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 6842 transitions. Word has length 26 [2021-03-11 00:21:11,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:11,565 INFO L480 AbstractCegarLoop]: Abstraction has 2016 states and 6842 transitions. [2021-03-11 00:21:11,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 00:21:11,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 6842 transitions. [2021-03-11 00:21:11,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:21:11,567 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:11,567 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 00:21:11,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3205 [2021-03-11 00:21:11,767 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:11,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:11,768 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-03-11 00:21:11,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:11,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236326294] [2021-03-11 00:21:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:12,295 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2021-03-11 00:21:12,793 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-03-11 00:21:13,141 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:21:13,486 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-11 00:21:13,808 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-11 00:21:13,927 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 00:21:13,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236326294] [2021-03-11 00:21:13,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918943078] [2021-03-11 00:21:13,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:13,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:21:13,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:14,392 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:21:14,663 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:21:14,913 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:21:15,888 WARN L205 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-11 00:21:16,022 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_423, v_prenex_425]} [2021-03-11 00:21:16,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:16,035 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 00:21:16,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:16,611 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:21:16,612 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-03-11 00:21:16,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:16,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:16,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:16,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:21:16,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:16,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:16,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:16,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:21:16,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:16,861 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:21:16,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:16,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:16,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:16,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:21:16,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:17,054 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:21:17,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:17,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:21:17,061 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-03-11 00:21:17,245 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-11 00:21:17,309 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 00:21:17,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:17,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:21:17,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641095602] [2021-03-11 00:21:17,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:21:17,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:17,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:21:17,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:21:17,310 INFO L87 Difference]: Start difference. First operand 2016 states and 6842 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 00:21:17,548 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-03-11 00:21:17,718 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2021-03-11 00:21:17,901 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:21:18,349 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:21:18,789 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-03-11 00:21:19,190 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-03-11 00:21:19,629 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-11 00:21:20,333 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-03-11 00:21:21,314 WARN L205 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-03-11 00:21:21,758 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:21:22,699 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-03-11 00:21:23,082 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:21:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:23,258 INFO L93 Difference]: Finished difference Result 2516 states and 8361 transitions. [2021-03-11 00:21:23,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:21:23,262 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 00:21:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:23,266 INFO L225 Difference]: With dead ends: 2516 [2021-03-11 00:21:23,266 INFO L226 Difference]: Without dead ends: 2501 [2021-03-11 00:21:23,266 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 8020.6ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:21:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-03-11 00:21:23,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2027. [2021-03-11 00:21:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.395853899308983) internal successors, (6880), 2026 states have internal predecessors, (6880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:23,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 6880 transitions. [2021-03-11 00:21:23,288 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 6880 transitions. Word has length 26 [2021-03-11 00:21:23,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:23,288 INFO L480 AbstractCegarLoop]: Abstraction has 2027 states and 6880 transitions. [2021-03-11 00:21:23,288 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 00:21:23,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 6880 transitions. [2021-03-11 00:21:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:21:23,290 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:23,290 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 00:21:23,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-03-11 00:21:23,491 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:23,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 57 times [2021-03-11 00:21:23,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:23,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759939656] [2021-03-11 00:21:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:23,852 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-11 00:21:24,207 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-03-11 00:21:24,445 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-03-11 00:21:24,658 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2021-03-11 00:21:24,734 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 00:21:24,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759939656] [2021-03-11 00:21:24,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810619135] [2021-03-11 00:21:24,735 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 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 00:21:24,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:21:24,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:24,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:21:24,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:25,388 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:21:25,628 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:21:25,957 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:21:27,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,075 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 00:21:27,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,119 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 37 treesize of output 13 [2021-03-11 00:21:27,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,163 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 34 treesize of output 16 [2021-03-11 00:21:27,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,210 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 25 treesize of output 7 [2021-03-11 00:21:27,217 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,262 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 00:21:27,266 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,306 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 00:21:27,311 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,351 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 45 treesize of output 16 [2021-03-11 00:21:27,355 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-03-11 00:21:27,402 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,442 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 13 [2021-03-11 00:21:27,446 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,483 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 43 treesize of output 13 [2021-03-11 00:21:27,488 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,525 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 43 treesize of output 19 [2021-03-11 00:21:27,529 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,564 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 00:21:27,568 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 19 [2021-03-11 00:21:27,607 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,639 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 36 treesize of output 16 [2021-03-11 00:21:27,643 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,675 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 37 treesize of output 19 [2021-03-11 00:21:27,679 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:27,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:21:27,695 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 30 treesize of output 13 [2021-03-11 00:21:27,699 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,858 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-11 00:21:27,860 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-03-11 00:21:27,862 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 00:21:27,862 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-03-11 00:21:28,006 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 00:21:28,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:28,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:21:28,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101216027] [2021-03-11 00:21:28,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:21:28,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:28,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:21:28,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:21:28,007 INFO L87 Difference]: Start difference. First operand 2027 states and 6880 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 00:21:28,781 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-11 00:21:28,960 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:21:29,856 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-11 00:21:30,035 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:21:30,278 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:21:30,677 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:21:31,230 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:21:31,921 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-03-11 00:21:32,396 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:21:32,930 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-03-11 00:21:33,294 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-03-11 00:21:33,517 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-11 00:21:33,959 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-11 00:21:34,145 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-11 00:21:34,521 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-03-11 00:21:34,758 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-03-11 00:21:34,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:34,849 INFO L93 Difference]: Finished difference Result 3330 states and 10522 transitions. [2021-03-11 00:21:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:21:34,853 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 00:21:34,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:34,858 INFO L225 Difference]: With dead ends: 3330 [2021-03-11 00:21:34,858 INFO L226 Difference]: Without dead ends: 3300 [2021-03-11 00:21:34,858 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 7123.4ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:21:34,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3300 states. [2021-03-11 00:21:34,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3300 to 2065. [2021-03-11 00:21:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 3.3997093023255816) internal successors, (7017), 2064 states have internal predecessors, (7017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:34,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 7017 transitions. [2021-03-11 00:21:34,886 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 7017 transitions. Word has length 26 [2021-03-11 00:21:34,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:34,886 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 7017 transitions. [2021-03-11 00:21:34,886 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 00:21:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 7017 transitions. [2021-03-11 00:21:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:21:34,889 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:34,889 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 00:21:35,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3285,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:35,089 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:35,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 50 times [2021-03-11 00:21:35,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:35,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983649609] [2021-03-11 00:21:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:35,517 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-03-11 00:21:35,914 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-11 00:21:36,215 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-11 00:21:36,471 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-11 00:21:36,744 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-11 00:21:36,870 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 00:21:36,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983649609] [2021-03-11 00:21:36,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528640243] [2021-03-11 00:21:36,870 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 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 00:21:36,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:21:36,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:36,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:21:36,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:37,245 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:21:37,618 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:21:38,063 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-11 00:21:39,043 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-11 00:21:40,286 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_451, v_prenex_453, v_prenex_454, v_prenex_456], 6=[v_prenex_450, v_prenex_446, v_prenex_447]} [2021-03-11 00:21:40,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:40,408 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:21:40,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 34 treesize of output 36 [2021-03-11 00:21:40,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:41,984 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 159 DAG size of output: 144 [2021-03-11 00:21:41,985 INFO L628 ElimStorePlain]: treesize reduction 191, result has 68.9 percent of original size [2021-03-11 00:21:42,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:42,074 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-03-11 00:21:42,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-03-11 00:21:42,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:42,728 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-03-11 00:21:42,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:42,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:42,828 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:21:42,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 34 [2021-03-11 00:21:42,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:43,490 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-03-11 00:21:43,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:43,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:43,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:43,565 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 43 treesize of output 41 [2021-03-11 00:21:43,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:44,248 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-03-11 00:21:44,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:44,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:44,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:44,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 41 [2021-03-11 00:21:44,335 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:45,012 WARN L205 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-03-11 00:21:45,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:45,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:45,109 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-03-11 00:21:45,109 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 27 treesize of output 29 [2021-03-11 00:21:45,125 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:45,781 WARN L205 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-03-11 00:21:45,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:45,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:45,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:45,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 30 [2021-03-11 00:21:45,873 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:46,524 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-11 00:21:46,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:46,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:46,607 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-03-11 00:21:46,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:21:46,616 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:47,225 WARN L205 SmtUtils]: Spent 609.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-11 00:21:47,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:47,258 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 00:21:47,258 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:624, output treesize:477 [2021-03-11 00:21:48,904 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-03-11 00:21:50,084 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-03-11 00:21:50,620 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:21:50,665 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 00:21:50,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:50,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:21:50,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255751546] [2021-03-11 00:21:50,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:21:50,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:21:50,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:21:50,666 INFO L87 Difference]: Start difference. First operand 2065 states and 7017 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 00:21:51,170 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-03-11 00:21:51,456 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 27 [2021-03-11 00:21:51,710 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:21:52,578 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-11 00:21:52,779 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:21:53,590 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-03-11 00:21:54,154 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-03-11 00:21:54,854 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 56 [2021-03-11 00:21:56,780 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2021-03-11 00:21:57,082 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-11 00:21:57,969 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:21:59,370 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 106 DAG size of output: 94 [2021-03-11 00:22:00,470 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-11 00:22:03,775 WARN L205 SmtUtils]: Spent 2.89 s on a formula simplification. DAG size of input: 110 DAG size of output: 97 [2021-03-11 00:22:05,810 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 149 DAG size of output: 115 [2021-03-11 00:22:06,783 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-11 00:22:09,865 WARN L205 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 108 DAG size of output: 95 [2021-03-11 00:22:11,437 WARN L205 SmtUtils]: Spent 744.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:22:13,908 WARN L205 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 105 DAG size of output: 77 [2021-03-11 00:22:15,952 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2021-03-11 00:22:18,332 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 104 DAG size of output: 71 [2021-03-11 00:22:19,884 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-03-11 00:22:22,714 WARN L205 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 126 DAG size of output: 81 [2021-03-11 00:22:24,606 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2021-03-11 00:22:26,953 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 132 DAG size of output: 57 [2021-03-11 00:22:27,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:27,702 INFO L93 Difference]: Finished difference Result 2822 states and 9262 transitions. [2021-03-11 00:22:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:22:27,706 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 00:22:27,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:27,710 INFO L225 Difference]: With dead ends: 2822 [2021-03-11 00:22:27,710 INFO L226 Difference]: Without dead ends: 2807 [2021-03-11 00:22:27,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 37041.8ms TimeCoverageRelationStatistics Valid=335, Invalid=1827, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:22:27,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2021-03-11 00:22:27,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 2071. [2021-03-11 00:22:27,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 2070 states have (on average 3.4009661835748792) internal successors, (7040), 2070 states have internal predecessors, (7040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 7040 transitions. [2021-03-11 00:22:27,736 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 7040 transitions. Word has length 26 [2021-03-11 00:22:27,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:27,736 INFO L480 AbstractCegarLoop]: Abstraction has 2071 states and 7040 transitions. [2021-03-11 00:22:27,736 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 00:22:27,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 7040 transitions. [2021-03-11 00:22:27,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:22:27,738 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:27,738 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 00:22:27,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:27,939 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:27,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:27,939 INFO L82 PathProgramCache]: Analyzing trace with hash 719147274, now seen corresponding path program 51 times [2021-03-11 00:22:27,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:27,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417471539] [2021-03-11 00:22:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:28,407 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-03-11 00:22:28,767 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-11 00:22:29,122 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-11 00:22:29,444 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-11 00:22:29,588 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-11 00:22:29,722 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-03-11 00:22:29,726 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 00:22:29,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417471539] [2021-03-11 00:22:29,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953576363] [2021-03-11 00:22:29,726 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 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 00:22:29,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:22:29,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:29,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:22:29,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:30,204 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:22:30,994 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:22:31,814 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-03-11 00:22:32,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:32,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:32,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 [2021-03-11 00:22:32,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:33,459 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 155 DAG size of output: 150 [2021-03-11 00:22:33,461 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.5 percent of original size [2021-03-11 00:22:33,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:33,559 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:22:33,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:22:33,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:34,219 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-03-11 00:22:34,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:34,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:34,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:34,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:22:34,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:34,941 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-03-11 00:22:34,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:34,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:35,046 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:22:35,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:22:35,064 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:35,668 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-03-11 00:22:35,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:35,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:35,773 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:22:35,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:22:35,779 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:36,377 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-03-11 00:22:36,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:36,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:36,468 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:22:36,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 00:22:36,474 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:37,066 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-03-11 00:22:37,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:37,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:37,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:37,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:22:37,160 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:38,218 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 123 DAG size of output: 118 [2021-03-11 00:22:38,220 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-03-11 00:22:38,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:22:38,337 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:22:38,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 00:22:38,343 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-03-11 00:22:38,373 WARN L222 SmtUtils]: Removed 2 from assertion stack [2021-03-11 00:22:38,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3423,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:38,574 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-11 00:22:38,577 WARN L224 ceAbstractionStarter]: Timeout [2021-03-11 00:22:38,577 INFO L202 PluginConnector]: Adding new model min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 12:22:38 BasicIcfg [2021-03-11 00:22:38,577 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 00:22:38,577 INFO L168 Benchmark]: Toolchain (without parser) took 822723.41 ms. Allocated memory was 255.9 MB in the beginning and 507.5 MB in the end (delta: 251.7 MB). Free memory was 236.5 MB in the beginning and 389.5 MB in the end (delta: -153.0 MB). Peak memory consumption was 305.5 MB. Max. memory is 16.0 GB. [2021-03-11 00:22:38,577 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 171.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:22:38,577 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.38 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:22:38,578 INFO L168 Benchmark]: Boogie Preprocessor took 17.63 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:22:38,578 INFO L168 Benchmark]: RCFGBuilder took 317.14 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 235.3 MB in the end (delta: -1.9 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. [2021-03-11 00:22:38,578 INFO L168 Benchmark]: TraceAbstraction took 822355.92 ms. Allocated memory was 255.9 MB in the beginning and 507.5 MB in the end (delta: 251.7 MB). Free memory was 234.6 MB in the beginning and 389.5 MB in the end (delta: -154.9 MB). Peak memory consumption was 302.4 MB. Max. memory is 16.0 GB. [2021-03-11 00:22:38,578 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 0.19 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 171.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.38 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.63 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 317.14 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 235.3 MB in the end (delta: -1.9 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 822355.92 ms. Allocated memory was 255.9 MB in the beginning and 507.5 MB in the end (delta: 251.7 MB). Free memory was 234.6 MB in the beginning and 389.5 MB in the end (delta: -154.9 MB). Peak memory consumption was 302.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). 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 113 for 27ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 822262.4ms, OverallIterations: 111, TraceHistogramMax: 2, EmptinessCheckTime: 269.2ms, AutomataDifference: 479583.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 31.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4510 SDtfs, 21980 SDslu, 34036 SDs, 0 SdLazy, 63659 SolverSat, 3670 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 62975.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5835 GetRequests, 1990 SyntacticMatches, 117 SemanticMatches, 3728 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43665 ImplicationChecksByTransitivity, 517237.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2071occurred in iteration=110, InterpolantAutomatonStates: 2853, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2900.0ms AutomataMinimizationTime, 110 MinimizatonAttempts, 81318 StatesRemovedByMinimization, 110 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 368.2ms SsaConstructionTime, 1330.6ms SatisfiabilityAnalysisTime, 303134.8ms InterpolantComputationTime, 5454 NumberOfCodeBlocks, 5454 NumberOfCodeBlocksAsserted, 344 NumberOfCheckSat, 5237 ConstructedInterpolants, 155 QuantifiedInterpolants, 173251 SizeOfPredicates, 631 NumberOfNonLiveVariables, 7066 ConjunctsInSsa, 2193 ConjunctsInUnsatCore, 217 InterpolantComputations, 3 PerfectInterpolantSequences, 107/1262 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